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Why settle for less when you can capture the cosmos in all its glory with the high-quality Light Pollution Imaging Filter for Rowe-Ackermann Schmidt Astrograph (RASA) 11"? This innovative filter, custom-designed by Celestron and Astrodon, is your ultimate solution to light pollution challenges in astrophotography. This advanced filter is specifically engineered to enhance your experience with the Celestron Rowe-Ackermann Schmidt Astrograph, even in light-polluted environments. With its generous 72mm diameter, it effortlessly accommodates the largest sensors of today's cameras, ensuring you never miss a detail. The Light Pollution Imaging Filter for RASA is a testament to the collaborative genius of Celestron engineers and Astrodon, the world's leading imaging filter company. The outcome is a durable and effective light pollution suppression filter that optimizes your astroimaging experience. This innovative filter replaces a placeholder glass in the optical path, ensuring RASA's precise optical path remains unaltered. It's not just about removing light pollution; this filter is designed to keep your images bright and vibrant. In light-polluted areas, skyglow can degrade the quality of your astrophotography images. This filter selectively blocks light emitted from common streetlights and other ambient lighting, without compromising the total light throughput. Unlike most light pollution filters, the Light Pollution Imaging Filter for RASA preserves over 90 percent of the light captured by your telescope at many wavelengths, ensuring your images never appear too green or blue. The Celestron LP Imaging Filter for RASA stands out with its neutral color balance. Its dielectric coatings further enhance light transmission, allowing you to bring out subtle color in galaxies and other faint deep sky objects. The filter also features anti-reflective coatings to prevent star halos and minimize internal reflections. Every Celestron Light Pollution Imaging Filter undergoes individual testing for light transmission. You'll receive the actual transmission spectrum for your specific filter, prepared by Astrodon and matched to your filter's serial number. This ensures you have total confidence in your filter's performance and the quality of your astrophotography.

Take your astrophotography to the next level with the 36cm Rowe-Ackermann Schmidt Astrograph (RASA) Telescope, a pinnacle of Celestron's innovative optics technology. This high-quality, durable astrograph is designed for the serious astrophotographer who demands sophisticated and advanced equipment for space surveillance, Space Situational Awareness (SSA), and other scientific applications.The RASA Telescope stands out with its large 14-inch (355mm) aperture, which significantly enhances its light-gathering capability, resulting in brighter and more detailed images of the cosmos. Its fast f/2.2 optical system allows for rapid image capture, making it ideal for capturing fleeting celestial events and detailed wide field astroimaging.Celestron's RASA design is optimized for a flat focal plane, ensuring sharp focus all the way to the edge of its expansive field of view. This innovative design eliminates common optical defects such as field curvature, off-axis coma, and astigmatism, providing you with pristine, professional-grade images.As the largest RASA model Celestron offers, this telescope is unmatched in its class, providing an "off-the-shelf" solution that rivals custom-built instruments. The extended spectral range focus (400-900 nm) of the RASA 36 cm allows for a brighter signal capture, enhancing the capabilities of your camera sensor and ensuring superior image quality.The telescope's redesigned focus system is a testament to Celestron's commitment to user-friendly, stable, and precise focusing. With an ample back-focus distance of 77.5 mm, the RASA 36 cm is versatile enough to accommodate a wide array of imaging sensors. For those seeking an even broader perspective, a custom camera adapter can be added to achieve an impressive field of view up to 4.4 degrees.Choose the 36cm Rowe-Ackermann Schmidt Astrograph RASA Telescope for its unparalleled aperture, speed, and field of view, and join the ranks of astrophotographers who trust Celestron's legacy of quality and performance.

This kit combines the 8" Rowe-Ackermann Schmidt Astrograph (RASA) with the state-of-the-art CGX German equatorial mount. Simply add a camera and this package offers everything you need to take spectacular images of wide-field deep sky objects. Although about the same size as the CGEM II, the CGX is a big step up in performance and features, especially for imaging applications. RASA Performance Made for Everyone Capture spectacular wide-field deep sky images in seconds with Celestron's new portable astrograph, the 8" Rowe-Ackermann Schmidt Astrograph (RASA). This incredibly fast f/2.0 system is the perfect companion to today's color astronomical CMOS cameras, smaller CCD cameras, and mirrorless cameras. Thanks to its fast focal ratio and patented optical design, you can produce sharp, detailed images and, in many cases, skip the autoguider completely. Weighing in at just 17 pounds, it's easy to transport your 8" RASA to the most remote dark sky locations. The 8" RASA is an imaging telescope that delivers a flat field without optical aberrations for razor sharp stars across a wide field of view. It can capture stunning deep-sky astronomical images without the challenges typically presented by longer focal length instruments at a fraction of the cost of those systems. The latest addition to the RASA family, this 8" version is a much more portable and affordable version of the heralded RASA 11, which was introduced to much acclaim in 2014. With the 8" RASA joining the lineup, a wider range of astroimagers can enjoy the benefits of the RASA design. It has many of the same thoughtfully designed features as its "big brother" RASA 11, including the integrated air-cooling system, internal filter mount, and sturdy CGE dovetail mounting bar. Purely designed for imaging, the 8" RASA cannot be used visually. The prime focus focal plane is located at the front of the optical system, so it cannot accommodate a traditional eyepiece. Shorter Exposure Times and Virtual "Real-Time" Observing Since it is an F/2.0 optical system, imagers can use shorter exposure times to capture detail in faint objects. When combined with sensitive cameras and the proper "live stacking" software, the 8" RASA can provide an almost real-time observing experience. View images on a computer instantly that are brighter and more detailed than can be seen in much bigger telescopes with the naked eye. Because shorter exposure times are possible, your equatorial mount won't need to accurately track over extended periods. The 8" RASA's relatively short 400mm focal length also lessens equatorial tracking demands. In many cases, autoguiding will not be required. Weighing only 17 lb, this optical tube pairs perfectly with a wide variety of mounts. Ultra-Stable Focus System With the launch of the 8" RASA, Celestron is unveiling a new focuser design that mitigates lateral movement of the primary mirror when focusing, slewing, or tracking with the astrograph. Focusing is...

Light pollution in the night sky can significantly degrade contrast in astronomical images. This is especially true when using very fast telescopes like the 8" RASA because the sky background saturates very quickly. The "noise" of the light pollution overwhelms the "signal" from the celestial object you are imaging, making it difficult to get the most detailed image. The Light Pollution Imaging Filter for the 8" RASA remedies this by blocking light pollution while transmitting light from deep-sky objects. The result is bright, detailed objects that pop off the black sky background with superior contrast. Fortunately, many sources of light pollution have relatively discreet emission spectra; they emit primarily at specific wavelengths of light. By strategically blocking these wavelengths, the filter greatly reduces the effects of light pollution without degrading overall image quality. The Light Pollution Imaging (LPI) Filter for the 8" RASA blocks light from some of the most common sources of light pollution between 400-700nm (i.e., the visible spectrum), including high- and low-pressure sodium-vapor streetlights, mercury-vapor streetlights, and natural airglow caused by oxygen in the atmosphere. Unlike some light pollution filters, the LPI filter blocks only specific areas of the spectrum instead of wide regions. This helps to maintain image brightness and color balance. In addition, specific wavelengths associated with emission nebulae, such as H-alpha(656nm), H-beta(486nm), OIII (496nm and 501nm), and SII (672nm), are highly transmitted, ensuring minimal loss of image brightness for those objects. The filter fits directly into the internal filter mount in the RASA 8's front lens cell, where the optical window normally mounts. By removing the clear window and replacing it with the filter, optical performance for the entire system is maintained.Each filter comes with a plastic storage case to safely store the filter or the placeholder glass that came with your RASA when not in use. You will also receive a spectral transmission graph unique to your specific unit, verifying its performance.

Explore the cosmos with the 8" f/2.0 Rowe-Ackermann Schmidt Astrograph (RASA) Telescope, a cutting-edge portable astrograph from Celestron. This state-of-the-art telescope is designed to capture breathtaking wide-field deep sky images in mere seconds, making it an ideal companion for today's advanced color astronomical CMOS cameras, compact CCD cameras, and mirrorless cameras. The 8" RASA Telescope boasts a fast f/2.0 system, a patented optical design, and a lightweight build of just 17 pounds, making it an easy-to-transport tool for your astronomical adventures. Its fast focal ratio allows you to produce sharp, detailed images, often eliminating the need for an autoguider. This imaging telescope is engineered to deliver a flat field without optical aberrations, ensuring razor-sharp stars across a wide field of view. It's capable of capturing stunning deep-sky astronomical images without the challenges typically associated with longer focal length instruments, and at a fraction of the cost. The 8" RASA is the latest addition to the RASA family, offering a more portable and affordable alternative to the highly acclaimed RASA 11. Despite its smaller size, it shares many of the same innovative features as the RASA 11, including an integrated air-cooling system, internal filter mount, and sturdy CGE dovetail mounting bar. Designed purely for imaging, the 8" RASA does not accommodate traditional eyepieces as the prime focus focal plane is located at the front of the optical system. However, its F/2.0 optical system allows for shorter exposure times, capturing detail in faint objects. When paired with sensitive cameras and the right "live stacking" software, the 8" RASA can provide an almost real-time observing experience, displaying images on a computer that are brighter and more detailed than what can be seen through larger telescopes with the naked eye. The 8" RASA also introduces a new Ultra-Stable Focus System, designed to minimize lateral movement of the primary mirror when focusing, slewing, or tracking. This new design makes focusing easier, more accurate, and more stable than ever before. Unlike larger RASAs, the 8" model is optimized for color astronomical CMOS cameras, smaller CCD cameras, and mirrorless cameras. It is not compatible with standard DSLR cameras. It performs best with sensors up to a 22mm diagonal, but can also work well with sensors up to 32mm diagonal. The 8" RASA's unique optical design, which is patented (US 2016/0299331 A1), consists of a Schmidt corrector, primary mirror, lens group, and optical window. The lens group contains four elements and utilizes rare-earth elements. The telescope's optics are designed to perform over a wider spectral range, from 390-800nm, allowing more of the light emitted from the astronomical object to be sharply focused in the image. Celestron's 8" RASA Telescope is a powerful tool for any astroimager, offering superior optical performance, field illumination, and a unique design that sets it...

Find the perfect tool for capturing breathtaking wide-field deep sky images with the 8" Rowe-Ackermann Schmidt Astrograph (RASA) Telescope. This portable astrograph from Celestron is designed to work seamlessly with today's color astronomical CMOS cameras, smaller CCD cameras, and mirrorless cameras. Its fast f/2.0 system, combined with a patented optical design, allows you to produce sharp, detailed images in seconds, often eliminating the need for an autoguider.Weighing just 17 pounds, the 8" RASA Telescope is easy to transport to remote dark sky locations. Its imaging capabilities deliver a flat field without optical aberrations, resulting in razor-sharp stars across a wide field of view. Capture stunning deep-sky astronomical images without the typical challenges presented by longer focal length instruments, and at a fraction of the cost.This 8" RASA Telescope is a more portable and affordable version of the acclaimed RASA 11. It boasts many of the same features, including an integrated air-cooling system, internal filter mount, and sturdy CGE dovetail mounting bar. However, it's important to note that this model is purely designed for imaging and cannot be used visually.Thanks to its F/2.0 optical system, you can use shorter exposure times to capture detail in faint objects. When paired with sensitive cameras and the appropriate "live stacking" software, the 8" RASA Telescope can provide an almost real-time observing experience. View images on a computer instantly that are brighter and more detailed than can be seen in much larger telescopes with the naked eye.The 8" RASA Telescope features a new Ultra-Stable Focus System, which mitigates lateral movement of the primary mirror when focusing, slewing, or tracking with the astrograph. This makes focusing easier, more accurate, and more stable than ever. The system is built on two sets of precision bearings that are precisely aligned and tested during assembly to ensure optimal results.Unlike larger RASAs that work with DSLR and large CCD cameras, this 8" model is designed with color astronomical CMOS cameras, smaller CCD cameras, and mirrorless cameras in mind. It is optimized for sensors with up to a 22mm diagonal but performs well with sensors up to 32mm diagonal. The unique optical design of the RASA Telescope is patented and consists of a Schmidt corrector, primary mirror, lens group, and optical window. The lens group contains 4 elements and utilizes rare-earth elements. The telescope's optics are designed to perform over a wider spectral range, from 390-800nm, allowing more of the light emitted from the astronomical object to be sharply focused in the image.Celestron offers a Light Pollution Imaging Filter designed specifically for the 8" RASA, which mounts in place of the optical window. All refractive optical surfaces are coated with StarBright XLT coatings, while the primary mirror uses enhanced aluminum coatings. This maintains high light transmission through the entire optical...

If you're an astronomy enthusiast or a professional astrophotographer, the CGX-L 1100, 11" Rowe-Ackermann Schmidt Astrograph (RASA) Equatorial Telescope - Version 2 is a high-quality, durable, and advanced piece of equipment designed to elevate your stargazing and imaging experience. This innovative telescope boasts a large 11-inch aperture, allowing for an influx of light that results in brighter, clearer, and more detailed images of celestial objects.The sophisticated Rowe-Ackermann Schmidt optics system, coupled with a 4.48-inch eyepiece, provides a wide field of view, making it easier to locate and observe celestial bodies. This advanced-level imaging setup sets a new standard in astroimaging systems, producing images in a fraction of the time compared to other optical tubes.The CGX-L mount is designed to provide superior performance for larger telescopes, taking full advantage of Celestron's most advanced technologies. These include All-Star Polar Alignment, Celestron PWI telescope control software, Starry Night Special Edition software, SkyAlign, and permanently programmable periodic error correction (PPEC).The RASA V2 is the perfect companion to today's top DSLR or astronomical CCD cameras, offering a fast, wide-field f/2.2 system for shorter exposure times without sacrificing resolution. The short focal length lessens equatorial tracking demands, and in many cases, autoguiding will not be required.The RASA 11 V2 features 4-element rare-earth glass optics for images free of false color and aberrations like coma and field curvature. The optical quality and spot size across the entire image circle are unprecedented for an astrograph in this price range.The RASA 11 V2 also utilizes the new Ultra-Stable Focus System (USFS), which minimizes focus shift and mirror flop. The integrated 12V DC MagLev fan reduces cooldown time and provides optimal airflow through the dust filtered optical tube.Celestron's CGX-L computerized equatorial mount is the pinnacle of our fully computerized equatorial mount series. It is capable of carrying Celestron's largest optical tubes with ease, making it perfect for backyard observatories and remote imagers looking for exceptional load capacity to weight ratio, compact design, and innovative features that fully support large telescopes, imaging kits, and the latest in wireless tech accessories.In conclusion, the CGX-L 1100, 11" Rowe-Ackermann Schmidt Astrograph (RASA) Equatorial Telescope - Version 2 is a sophisticated, high-quality, and advanced tool for any astronomy enthusiast or professional astrophotographer. Its innovative features and superior performance make it a standout choice in the field of astroimaging systems.

Explore the cosmos with unparalleled clarity using the Celestron CGX-L Equatorial 1100 Rowe-Ackermann Schmidt Astrograph RASA Telescope, a high-quality instrument designed for the serious astronomer and astrophotographer. This sophisticated and durable telescope is a testament to Celestron's legacy of innovative astronomical equipment, offering advanced features for capturing breathtaking deep-sky images.The Rowe-Ackermann Schmidt Astrograph boasts a large 11-inch (280mm) aperture, providing an expansive light-gathering capability to produce brighter, more detailed observations of the night sky. Its fast, wide-field f/2.2 optical system is a game-changer, offering two significant advantages over traditional f/10 systems: superior apparent tracking and the ability to achieve stunning astroimages with shorter exposure times. This means you can create exquisite celestial photographs quickly and efficiently, without the necessity of an autoguider.Celestron's cutting-edge optical design includes a 4-element lens group made of rare-earth glass, ensuring images are free from chromatic aberration and common distortions like coma and field curvature. The optimized 43.3mm image circle is perfect for capturing pinpoint stars across the largest imaging sensors, making it ideal for wide-field imaging, creating vast mosaics of the night sky, surveying, and comet hunting.The Rowe-Ackermann Schmidt Astrograph's optical performance is further enhanced by minimal vignetting and a focal length of just 620mm. The custom-engineered linear brass focuser bearing, coupled with the FeatherTouch Micro Focus Knob, provides the precision required for capturing the perfect shot. A 12V MagLev fan ensures rapid cooldown and maintains optimal airflow, equipped with a dust filter to preserve the integrity of the optical path.The CGX-L mount, a cornerstone of Celestron's computerized equatorial mount series, supports the astrograph with exceptional load capacity, compact design, and user-friendly features. It is engineered for both backyard observatories and remote imagers, boasting larger 144mm diameter worm wheels for smooth operation and precise control of heavier loads. The extended 270mm dovetail saddle accommodates larger optical tubes, while integrated home and limit optical sensors, improved polar alignment adjustments, and enhanced cable management make for a seamless user experience.Mechanical and ergonomic improvements throughout the mount ensure it is sturdy, intuitive to use, and easy to transport, making it the ideal companion for the advanced Celestron astrograph. Whether you're capturing the intricate details of distant galaxies or surveying the night sky, the Celestron CGX-L Equatorial 1100 Rowe-Ackermann Schmidt Astrograph RASA Telescope is engineered to deliver superior performance for discerning astronomers and astrophotographers.

The CGX 1100 Rowe-Ackermann Schmidt Astrograph Equatorial Telescope (CGX 11" RASA) sets a new standard in astroimaging systems at an extremely affordable price. The CGX 11" RASA telescope is an excellent advanced-level imaging setup. The Rowe-Ackermann Schmidt Astrograph (RASA) produces images in a fraction of the time compared to other optical tubes. The CGX mount provides superior performance for larger telescopes while taking advantage of Celestron's most advanced technologies: All-Star Polar Alignment, Celestron PWI telescope control software, Starry Night Special Edition software, SkyAlign, and permanently programmable periodic error correction (PPEC).ror correction (PPEC). If you're an experienced imager, you'll love taking this mount to a dark sky site and enjoying all the conveniences of a larger observatory mount. Rowe-Ackermann Schmidt Astrograph Features Capturing impressive deep-sky astroimages is easier than ever with Celestron's Rowe-Ackermann Schmidt Astrograph (RASA) V2, the perfect companion to today's top DSLR or astronomical CCD cameras. This fast, wide-field f/2.2 system allows for shorter exposure times compared to traditional f/10 astroimaging, without sacrificing resolution. Because shorter sub-exposure times are possible, your equatorial mount won't need to accurately track over extended periods. The short focal length also lessens equatorial tracking demands. In many cases, autoguiding will not be required. RASA 11 V2 builds on the legacy of Celestron's Schmidt Cameras, which allowed astrophotographers to produce images with much shorter exposure times on film in the 1970s. Today, with CCD sensor sizes as large as film or larger, the RASA 11 V2 offers a 43.3mm optimized image circle to capture pinpoint stars on the largest imaging chips. Optical performance for huge sensors with diagonals of up to 52mm wide is still excellent. Combine this large image circle with a focal length of just 620mm and you have an instrument suitable for wide-field imaging, creating huge mosaics of the night sky, surveying, and even comet hunting. Optical Performance The RASA 11 V2 features optics with 4-element rare-earth glass for images free of false color and aberrations like coma and field curvature. The optical quality and spot size across the entire image circle are unprecedented for an astrograph in this price range or even that of a much more expensive instrument. The design also provides minimal vignetting. Advanced Features RASA 11 V2 utilizes the new Ultra-Stable Focus System (USFS). At the heart of this system is a precision linear ball bearing. The bearing serves to minimize focus shift (unwanted lateral motion of the primary mirror during focusing which causes shifting of the image) and mirror flop (movement of the primary mirror when the telescope is pointing to different positions in the sky). The USFS is also compatible with the optional Celestron Focus Motor (#94155-A). The integrated 12V DC MagLev...

When precision and quality are paramount in your astrophotography pursuits, the Evoguide 50DX APO 50mm f/4.8 Guide Scope Astrograph stands out as a superior choice. Crafted by the esteemed Sky-Watcher, a brand synonymous with excellence in astronomical equipment, this high-quality guide scope incorporates an advanced doublet refractor design that ensures breathtaking clarity and contrast. The Evoguide 50DX APO is engineered to deliver coal-black skies and impeccably sharp, contrast-rich views of both planetary and deep-space phenomena, setting a new standard for observers and astrophotographers alike.The robust construction of this guide scope is not only durable but also innovatively designed for ease of use. It boasts a portable form factor that makes it an ideal companion for remote stargazing sessions. The user-friendly interface is highlighted by M42 rings at the rear, facilitating a seamless and secure attachment to your guide camera. Additionally, the substantial single-speed focus ring is intuitively placed to allow for precise focusing, ensuring that you capture the cosmos in all its splendor with minimal effort.While the Evoguide 50DX APO was initially envisioned for use with guide cameras, its versatility extends to primary astrophotography applications. When paired with an optional focal reducer, this guide scope transforms into a formidable astrograph capable of producing stunning wide-field images with rapid exposure times and low focal lengths. This adaptability makes the Evoguide 50DX APO a preferred choice for both novice and seasoned astrophotographers seeking a reliable, high-performance instrument that delivers consistently exceptional results.In summary, the Evoguide 50DX APO 50mm f/4.8 Guide Scope Astrograph by Sky-Watcher is a testament to innovative design and user-friendly functionality, offering an unparalleled viewing experience for the discerning astronomer. Whether you're guiding or capturing the cosmos, this guide scope is poised to elevate your astrophotography to celestial heights.

Experience the power and precision of Celestron's CGEM II 800 8" f/2 Rowe-Ackermann Schmidt Astrograph (RASA) GoTo Telescope, a portable astrograph designed to capture breathtaking wide-field deep sky images in mere seconds. This innovative f/2.0 system is ideally suited for use with today's color astronomical CMOS cameras, compact CCD cameras, and mirrorless cameras. The 8" RASA's fast focal ratio and patented optical design allow you to produce sharp, detailed images, often eliminating the need for an autoguider. Weighing just 17 pounds, this telescope is easily transportable, making it perfect for trips to remote dark sky locations. The 8" RASA is a dedicated imaging telescope, delivering a flat field devoid of optical aberrations for razor-sharp stars across a broad field of view. It enables you to capture stunning deep-sky astronomical images without the typical challenges presented by longer focal length instruments, and at a fraction of the cost. This telescope is the latest addition to the acclaimed RASA family, offering a more portable and affordable alternative to the highly praised RASA 11. Like its predecessor, the 8" RASA boasts a range of carefully designed features, including an integrated air-cooling system, internal filter mount, and robust CGE dovetail mounting bar. As an F/2.0 optical system, the 8" RASA allows for shorter exposure times, capturing detail in faint objects quickly. When paired with sensitive cameras and appropriate "live stacking" software, this telescope can provide an almost real-time observing experience, delivering images that are brighter and more detailed than those seen in larger telescopes with the naked eye. The 8" RASA's relatively short 400mm focal length reduces equatorial tracking demands, often eliminating the need for autoguiding. Despite its lightweight design, this optical tube pairs seamlessly with a wide variety of mounts. Celestron's new Ultra-Stable Focus System, introduced with the 8" RASA, minimizes lateral movement of the primary mirror when focusing, slewing, or tracking, ensuring easier, more accurate, and more stable focusing. This telescope is optimized for sensors up to a 22mm diagonal, but performs well with sensors up to 32mm diagonal. It is not compatible with standard DSLR cameras, but works well with the APS-C sized sensors found in many mirrorless cameras. The 8" RASA's unique optical design, patented under US 2016/0299331 A1, consists of a Schmidt corrector, primary mirror, lens group, and optical window. The lens group contains four elements and utilizes rare-earth elements. Designed to perform over a wider spectral range, from 390-800nm, the 8" RASA ensures more of the light emitted from the astronomical object is sharply focused in the image. Celestron's 8" RASA, with its advanced features and superior optical performance, is a game-changer for astroimagers, offering a unique blend of portability, affordability, and high-quality imaging.

You can elevate your astrophotography experience with the Tele Vue 127mm F/5.3 APO (Nagler-Petzval) Astrograph Refractor, a high-quality, advanced piece of optical equipment designed specifically for the ProLine PL16803 camera. This innovative refractor, a product of a strategic collaboration between Tele Vue Optics and Finger Lakes Instrumentation, is a turn-key solution for wide-field imaging, dedicated to the passionate astro-imager.The refractor's large 5" (127mm) aperture allows for an influx of light, enhancing image quality even in low-light conditions. Its flat-field, fast focal ratio, and short focal length are perfectly harmonized with the ProLine PL16803 camera, producing a field of over 4 degrees filled with beautifully sharp stars.The NP127fli is meticulously designed to position the Atlas focuser near the center of its travel, ensuring optimal performance. The Large Field Corrector lens, a unique feature of Tele Vue, is strategically placed within the Atlas to accommodate the combined path length of FLI's CenterLine filter wheel and ProLine cameras. This sophisticated setup uses FLI's Zero Tilt Adapter system for seamless connections.Incorporating Tele Vue's unique image plane tilt correction, the NP127fli's new rear section is a testament to the brand's innovative approach. During the final stage of the build process at Tele Vue, each scope is finely tuned to ensure the imaging train is as perfectly adjusted as possible. This durable refractor also offers built-in user adjustability to cater to any possible differences between a customer's existing pieces of equipment.Experience the blend of Tele Vue's reputation for quality with the cutting-edge technology of Finger Lakes Instrumentation in the 127mm F/5.3 APO (Nagler-Petzval) Astrograph Refractor. It's more than just a piece of equipment; it's a gateway to the stars.

Capturing impressive deep-sky astroimages is easier than ever with Celestron's Rowe-Ackermann Schmidt Astrograph (RASA) V2, the perfect companion to today's top DSLR or astronomical CCD cameras. This fast, wide-field f/2.2 system allows for shorter exposure times compared to traditional f/10 astroimaging, without sacrificing resolution. Because shorter sub-exposure times are possible, your equatorial mount won't need to accurately track over extended periods. The short focal length also lessens equatorial tracking demands. In many cases, autoguiding will not be required. RASA 11 V2 builds on the legacy of Celestron's Schmidt Cameras, which allowed astrophotographers to produce images with much shorter exposure times on film in the 1970s. Today, with CCD sensor sizes as large as film or larger, the RASA 11 V2 offers a 43.3mm optimized image circle to capture pinpoint stars on the largest imaging chips. Optical performance for huge sensors with diagonals of up to 52mm wide is still excellent. Combine this large image circle with a focal length of just 620mm and you have an instrument suitable for wide-field imaging, creating huge mosaics of the night sky, surveying, and even comet hunting. Optical Performance The RASA 11 V2 features optics with 4-element rare-earth glass for images free of false color and aberrations like coma and field curvature. The optical quality and spot size across the entire image circle are unprecedented for an astrograph in this price range or even that of a much more expensive instrument. The design also provides minimal vignettin Advanced Features RASA 11 V2 utilizes the new Ultra-Stable Focus System (USFS). At the heart of this system is a precision linear ball bearing. The bearing serves to minimize focus shift (unwanted lateral motion of the primary mirror during focusing which causes shifting of the image) and mirror flop (movement of the primary mirror when the telescope is pointing to different positions in the sky). The USFS is also compatible with the optional Celestron Focus Motor (#94155-A). The integrated 12V DC MagLev fan reduces cooldown time and provides optimal airflow through the dust filtered optical tube. Engineered as a complete astroimaging system, every component of the RASA 11 V2 is optimized for peak performance with DSLR and astronomical CCD cameras. Down to the thickness of the glass used in the included fully-multicoated optical window or optional imaging filter, every component of the system has been taken into careful consideration to work together seamlessly. The Dovetail CGE bars on the top of the optical tube provides a connection for use of optional accessories like a guidescope.

Telescopes, Eyepieces and Astrographs: Design, Analysis and Performance of Modern Astronomical Optics is about every optical element between your eye or your imaging sensor and the night sky. Three expert authors have optimized designs found in today's astronomy market, explored the origins of different systems, analyzed their optical properties and assessed their performance - and in this book, they present it to you in terms that a non-specialist can understand and put to practical use. Telescopes come in many varieties: but which best meet your needs? Each has good points and bad, advantages and disadvantages, advocates and detractors. Advertisements flash technical terms at the prospective buyer - but what's genuine technical talk and what's baseless sales talk? This book systematically explores each type of telescope, eyepiece, and optical accessory on the market today, and tells you what's inside it, what it does well, what it does poorly, and what performance you can expect if you buy that type of telescope from a reputable telescope maker. As a telescope buyer, you can assess properties like size, weight, compactness, and price because the upsides and downsides are fairly obvious. But what about the weaknesses that advertising copy never mentions? Field curvature and spherochromatism are seldom understood and appreciated. Will these affect your visual viewing pleasure? How much will they affect your CCD images? This book explores and explains subtle factors that you easily miss without informed help from the experts

A 50.4mm Round f/2 High-speed Narrowband Imaging H-alpha/OIII/SII Filter Set, Unmounted, is a specialized set of three filters: H-alpha, O III, and S II. These high-speed narrowband filters are meticulously designed to meet the precise requirements of ultra-fast astrograph optics, specifically for Hyperstar and RASA systems. Traditional narrowband filters often result in significant transmission loss due to the pronounced CWL-shift. In extreme scenarios, the CWL may even shift beyond the FWHM (CWL= Center-wavelength / FWHM= full width half maximum). To counteract this, these filters feature a CWL-preshift that aligns perfectly with f/2 to f/3 optics. The FWHM of these filters is optimized to ensure maximum contrast, even with the typical line broadening associated with fast optical trains. This makes them an ideal choice for high contrast emission nebulae imaging with fast optics. When compared to standard narrowband filters at f/2, these filters offer a triple S/N-ratio, enhancing the quality of your astro-imaging significantly. For those using these filters within the f/1.8 to f/3.5 range, the improvement over regular sets of narrowband filters is dramatic. This 50.4mm Round f/2 High-speed Narrowband Imaging H-alpha/OIII/SII Filter Set, Unmounted, is a game-changer for astrophotography enthusiasts, offering unparalleled performance and image quality.

Discover the transformative power of the 31mm Round f/2 High-speed H-alpha Filter, unmounted, a high-quality and innovative product from the reputable Baader Planetarium. This durable and reliable filter is specifically engineered for the specialized requirements of ultra-fast astrograph optics, including Hyperstar and RASA systems. Unlike conventional narrowband filters that often result in significant transmission loss due to the strong Central Wavelength (CWL) shift, this high-speed H-alpha filter is designed with a CWL-preshift that perfectly aligns with f/2 to f/3 optics. This unique feature ensures that even in extreme cases, the CWL does not shift out of the Full Width at Half Maximum (FWHM), thereby optimizing the FWHM and delivering maximum contrast.This effective filter is a game-changer in the field of astrophotography, particularly for high contrast emission nebulae imaging. It is optimized for use with fast optics between f/1.8 and f/3.5, offering a dramatic improvement over regular sets of narrowband filters. Experience the night sky like never before with this innovative filter, designed to capture the hydrogen-alpha emission line in the sun's spectrum with unparalleled clarity and contrast. Whether you're a seasoned astrophotographer or a beginner in the field, the 31mm Round f/2 High-speed H-alpha Filter, unmounted, is a must-have addition to your astrophotography equipment.

Let your astrophotography ascend to new heights with the 31mm Round f/2 High-speed Narrowband Imaging H-alpha/OIII/SII Filter Set, expertly crafted by Baader Planetarium. This high-quality, durable, and innovative set of three filters is specifically designed to meet the exacting demands of ultra-fast astrograph optics, such as Hyperstar and RASA systems.Each filter in this setfthe H-alpha, OIII, and SIIfis meticulously engineered to overcome the common challenges faced with conventional narrowband filters, which often suffer from significant transmission loss due to the CWL-shift. With a pre-shifted Center-wavelength (CWL) that harmonizes perfectly with f/2 to f/3 optics, these filters ensure that the full width half maximum (FWHM) is not only maintained but optimized for your imaging needs.The result is a filter set that, despite the line broadening typically associated with fast optical trains, delivers maximum contrast and detail. This makes it an effective tool for capturing the intricate structures of emission nebulae with unparalleled clarity. When used with optics ranging from f/1.8 to f/3.5, the filters exhibit a dramatic improvement in image quality, offering a triple signal-to-noise ratio compared to standard narrowband filters at f/2.Versatile and effective, this filter set is an essential addition for any astrophotographer looking to explore the cosmos with fast optics. Whether you're capturing the vibrant hues of a distant nebula or the subtle details of the sun's surface, the 31mm Round f/2 High-speed Narrowband Imaging H-alpha/OIII/SII Filter Set is designed to elevate your celestial photography to professional levels. Experience the universe through your lens with vivid colors and sharp contrasts, thanks to the innovative design and superior performance of these Baader Planetarium filters.

A 31mm Round f/2 High-speed Oxygen-III Nebula Filter, Unmounted, is a specialized narrowband filter, meticulously engineered to meet the intricate needs of ultra-fast astrograph optics, specifically Hyperstar and RASA. Traditional narrowband filters often suffer from significant transmission loss due to a pronounced CWL-shift. In severe instances, the CWL may even shift out of the FWHM (CWL= Center-wavelength / FWHM= full width half maximum). To counteract this, our filters feature a CWL-preshift that perfectly aligns with f/2 to f/3 optics. The FWHM of this high-speed Oxygen-III Nebula Filter is expertly optimized. Despite the common line broadening associated with fast optical trains, this filter is capable of delivering maximum contrast, making it an essential tool for astrophotography. For the first time, these filters enable effective use of fast optics for high contrast emission nebulae imaging. When used between f/1.8 and f/3.5, these filters demonstrate a significant improvement over standard sets of narrowband filters. This 31mm Round f/2 High-speed Oxygen-III Nebula Filter, Unmounted, is a game-changer for astrophotographers seeking to capture the breathtaking beauty of the cosmos with unparalleled clarity and contrast.

Explore the wonders of the night sky with the 50x50mm Square f/2 High-speed H-alpha Filter, unmounted, from the reputable brand, Baader Planetarium. This high-quality, durable filter is specifically designed for the intricate needs of ultra-fast astrograph optics, including Hyperstar and RASA systems. Unlike conventional narrowband filters that often result in significant transmission loss due to the strong Central Wavelength (CWL) shift, this innovative filter features a CWL-preshift that perfectly aligns with f/2 to f/3 optics. This unique feature ensures that even in extreme cases, the CWL doesn't shift out of the Full Width at Half Maximum (FWHM), maintaining the integrity of your images.The FWHM of this reliable filter is optimized to deliver maximum contrast, despite the typical line broadening associated with fast optical trains. This makes it an effective tool for capturing high-contrast images of emission nebulae, truly bringing out the beauty of the cosmos in your astrophotography.For the first time, these filters allow the use of fast optics in a truly effective manner, showing a dramatic improvement in image quality when used between f/1.8 and f/3.5 compared to standard sets of narrowband filters. Whether you're an amateur astronomer or a seasoned professional, this 50x50mm Square f/2 High-speed H-alpha Filter is an essential tool for capturing the stunning details of the night sky.