3960 products were found matching your search for Focal length in 6 shops:

How does the Research Grade TZ-3 Telecentric System revolutionize your optical experience? This system, designed to work in harmony with any SolarSpectrum H-alpha filter, delivers a parallel optical beam and provides ample backfocus. Unlike a barlow lens, which is often confused with telecentric optics sets, the TZ-3 Telecentric System is engineered to position the exit pupil at infinity. This unique design ensures that the center ray from any point in the field appears to originate from infinity, making it perpendicular to the image plane and parallel to the optic axis. The result? An off-axis beam that arrives at the image plane with the same angular geometry as the axial rays. This means that all field elements appear as if they were on axis, across the image plane. Unlike a barlow lens, the edge field rays are not tipped bundles. This is because all the principal rays across the image plane are perpendicular to the image plane, allowing the rays at the edge of the field to pass through an etalon just in front of the focal plane with the exact same geometry as the rays on axis.In an f/30 telecentric optical arrangement, the etalon sees the same geometry clear across the field, ensuring the spectral bandpass does not shift in wavelength across the entire field of view. Starting from an aperture ratio of approximately f/15 (+2x Telecentric), f/10 (+3x Telecentric) or f/7.5 (+4x Telecentric), the Baader TZ-systems, including the TZ-3, create a parallel beam with an approximate f/30 aperture ratio. For telescopes with significantly deviating focal lengths, the clear objective aperture can be reduced in diameter to achieve a final resulting f/ratio close to f/30. The TZ-3 Telecentric System offers working distances ranging from 200mm for the TZ-2 to 230 mm for the TZ-4, and up to 250 mm for the TZ-3, when measured from their rear lens. This provides ample room for the H-alpha filter housing and most accessories, including a Baader 2" mirror diagonal or any conceivable camera device. The TZ-3's generous room can also accommodate a binocular viewer when mounted onto the SolarSpectrum body using a Baader BBHS T-2 star diagonal. All TZ-coatings are matched to the different lens glass-substrates and optimized for maximum throughput at 656 nm. The TZ-3 is also compatible with CaK at 396 nm, with a Strehl-ratio well above 80% at this wavelength. Experience the difference with the Research Grade TZ-3 Telecentric System.

The Focal Point Primed Polyurethane Panel Moulding Kit is a versatile design element that's perfect for, but not limited to, use as wainscot. Use it to add interest to any wall or ceiling. Create your own size and design by cutting or adding additional lengths of panel moulding. Size: small. Color: White Primed.

An affordable, high-quality lens that’s perfect for creative portraits and low-light photos – with a fixed focal length lens, the EF 50mm f/1.8 STM delivers great image quality with enhanced sharpness, extra contrast, and reduced distortion. This lens will bring your subject into sharp focus with beautiful background blur and the wide f/1.8 aperture lets in more light, reducing the need to use a flash in low-light conditions. Weighing in at just 160 g, and measuring just 40 mm long, the EF 50mm f/1.8 STM is a lens you can take with you wherever you go.

Made from a lightweight knit fabric, our Brisk Floral Ubar Tunic pairs with jeans or dress pants for a look that goes casual or dressy. The gathered neckline gives it a unique look, accented by polished goldtone hardware that creates a pretty focal point. V-neck. 3/4 sleeve. Length: 28". Polyester, spandex. Machine wash. Imported. Women's Brisk Floral Ubar Tunic Top in Black Size 4 (20/22-XXL) Chico's Outlet, Clearance Women's Clothing

Introducing our mesmerizing Mini Length Dress, a radiant ensemble that blends sophistication with a touch of allure. This dress boasts a captivating front cut-out detail, complemented by a stylish V-neck, adding an elegant focal point. The gathering detailing enhances the silhouette, accentuating your curves with grace. Adorned with long sleeves and crafted from a shimmery fabric with maximum stretch, this dress offers comfort without compromising on glamour. The matching lining ensures a flawless fit, while the shimmering fabric adds a touch of opulence to your look. Dry clean only

Unveil the mysteries of the universe this Christmas with our Telescope for Adults Astronomy Beginners. Designed with a 70 mm aperture and 400 mm focal length, this professional refractor telescope offers exceptional clarity and detail, making it the ideal tool for aspiring astronomers. Embark on a journey through the stars this Christmas with our 70 mm Aperture and 400 mm Focal Length Professional Refractor Telescope. Order yours today and give the gift of the universe to your loved ones.

Explore the world of high-quality imaging with the Sony Fixed Focal Length Short Throw Lens, specifically designed for VPL-PX20 & PX30 Multimedia Projectors. This lens offers unparalleled performance in delivering crisp, clear, and vibrant images, making it an essential accessory for your multimedia projector setup. The Sony Fixed Focal Length Short Throw Lens is engineered to provide a short throw distance, making it ideal for presentations in smaller rooms or spaces where the projector needs to be close to the screen. Its fixed focal length ensures consistent image quality, eliminating the need for constant adjustments during your presentations or viewing sessions.Crafted with Sony's renowned precision and attention to detail, this lens enhances your VPL-PX20 & PX30 Multimedia Projectors' capabilities, allowing you to project high-resolution images with exceptional clarity and detail. Whether you're conducting a business presentation, teaching a class, or enjoying a movie night at home, the Sony Fixed Focal Length Short Throw Lens elevates your visual experience to new heights.Incorporate this lens into your multimedia setup and experience the difference in image quality and performance that Sony products are known for. With the Sony Fixed Focal Length Short Throw Lens for VPL-PX20 & PX30 Multimedia Projectors, you're not just buying a lens; you're investing in a superior visual experience.

Take your stargazing experience to new heights with the Konustart-900B 2.3" Refractor Telescope. This versatile instrument is designed for enthusiasts who appreciate both astronomical and terrestrial viewing. With its impressive 900mm focal length, this telescope offers clear, sharp images of distant celestial bodies and landscapes alike.The Konustart-900B is now available in an innovative configuration that includes a special universal smartphone adapter. This cutting-edge feature transforms your smartphone into an astronomical camera, enabling you to capture stunning photographs and record videos of your celestial discoveries. Additionally, the adapter facilitates the use of star map applications, making it easier than ever to locate and identify stars, planets, and other objects in the night sky.The telescope's robust design is complemented by a deluxe carrying case, ensuring your equipment remains protected during transport and storage. The inclusion of a Right Ascension (R.A.) motor drive enhances your viewing experience by providing smooth and precise tracking of objects as they move across the sky.Key features of the Konustart-900B Refractor Telescope include:- A universal smartphone adapter that allows for astrophotography and celestial navigation using your own device (smartphone not included).- A deluxe carrying case for secure and convenient transportation.- An R.A. motor drive for automated tracking, making long observation sessions more comfortable and enjoyable.Whether you're a budding astronomer or a seasoned skywatcher, the Konustart-900B 2.3" Refractor Telescope with its 900mm focal length is an excellent choice for exploring the wonders of the universe.

After meticulous design and engineering, the iOptron Rumak-type 152mm Maksutov-Cassegrain OTA stands out as a top-tier choice for the dedicated amateur astronomer seeking professional-grade performance. With its substantial 6-inch (152mm) aperture and precise f/12.5 focal length, this telescope is engineered to harness a remarkable amount of light, unveiling the intricate cloud bands of Jupiter and the sprawling grandeur of the Andromeda Galaxy (M31) with exceptional clarity.The advanced multicoated optics of the MAK 152mm rival the high-contrast, bright views typically associated with a 5-inch apochromatic refractor, yet it is offered at a more accessible price point. This OTA's high-quality, Maksutov-Cassegrain design is renowned for its ability to deliver sharp, detailed images, making it a preferred instrument for serious celestial observation.The robust construction of the MAK 152mm ensures durability and sturdiness, with a built-in dew shield that enhances performance in cooler temperatures - a feature often not found in Maksutov-Cassegrain OTAs. The OTA's dual-speed focuser allows for smooth, precise adjustments, minimizing image shift and enabling fine-tuning of your observations to achieve peak optical performance.Whether you're exploring the craters of the Moon, the rings of Saturn, or distant nebulae, the MAK 152mm Maksutov-Cassegrain OTA from iOptron is designed to exceed expectations, offering a sturdy and professional-grade tool for astronomers who value optical and mechanical excellence.

Unveil the mysteries of the universe this Christmas with our Telescope for Adults Astronomy Beginners. Designed with a 70 mm aperture and 400 mm focal length, this professional refractor telescope offers exceptional clarity and detail, making it the ideal tool for aspiring astronomers. Embark on a journey through the stars this Christmas with our 70 mm Aperture and 400 mm Focal Length Professional Refractor Telescope. Order yours today and give the gift of the universe to your loved ones.

Make the most of your astronomical observations and astrophotography endeavors with the Explore Scientific 2x Barlow Focal Extender. This high-quality optical accessory, featuring a 2" barrel and a sophisticated 4-element design, is engineered to double the effective focal length of your telescope or microscope's lens, providing enhanced magnification for both visual and imaging applications.Unlike traditional Barlow or tele-negative lenses, the Explore Scientific Focal Extender offers a unique advantage for both amateur astronomers and professional astrophotographers. Its innovative design ensures that the magnification remains consistent at 2x, regardless of its placement within the optical chain. This means you can confidently introduce additional accessories, such as flip mirrors or filter wheels, without affecting the desired magnification level.Crafted with durability and versatility in mind, the Explore Scientific Focal Extender is compatible with a wide range of eyepieces and cameras, making it an indispensable tool for those seeking to capture more detailed images of celestial bodies. Its advanced optical construction not only increases magnification but also maintains the clarity and detail of the observed image.The durable build and reliable performance of this focal extender solidify its place as a must-have for any serious observer's toolkit. By choosing the Explore Scientific brand, known for its dedication to producing high-quality optical equipment, you are ensuring that your visual and imaging experiences are both rewarding and successful.Whether you're looking to observe the craters of the moon with greater clarity, delve into the intricate details of planetary surfaces, or capture distant galaxies and nebulae, the Explore Scientific 2x Barlow Focal Extender is your gateway to a more immersive and detailed exploration of the cosmos.

Let the Explore Scientific 3x Barlow Focal Extender, with its 1.25" Barrel and 4 Elements, elevate your imaging and visual applications by extending the effective focal length of your lens. This high-quality focal extender is designed to provide consistent magnification, regardless of its placement in the optical chain, making it an ideal choice for both amateur and professional astronomers.Unlike a standard Barlow or tele-negative lens, the Explore Scientific Focal Extender maintains its magnification even when the distance is altered. Whether you place it in front of your diagonal or behind it, you can be assured of achieving the promised 3x magnification. This unique feature eliminates the variability that can occur with other lenses, where magnification can change based on placement.This Focal Extender is not only perfect for enhancing the magnification of a lower power eyepiece for visual observations but also excels in imaging applications. Its design allows for the introduction of accessories such as a flip mirror or filter wheel between the Focal Extender and a CCD camera, without affecting the magnification. This flexibility makes it an invaluable tool for astro-photography, ensuring consistent, high-quality images regardless of the distance to the focused image.Experience the difference with the Explore Scientific 3x Barlow Focal Extender, a product that truly lives up to its name by offering consistent, high magnification across a range of applications.

Become an explorer of the cosmos with the Explore Scientific 5x Barlow Focal Extender. This high-quality optical accessory, featuring a 1.25" barrel and 4 elements, is designed to enhance your viewing and imaging experience by extending the effective focal length of the lens it is paired with. This innovative product offers increased magnification for both visual and imaging applications, making it a versatile addition to your telescope or microscope setup.Unlike standard Barlow or tele-negative lenses, the Explore Scientific Focal Extender maintains consistent magnification regardless of its placement in the optical chain. This means whether you place it in front of your diagonal or behind it, you're guaranteed to achieve the promised 5x magnification. This user-friendly feature eliminates the guesswork and variability often associated with traditional Barlow lenses, where magnification can change based on lens placement.Furthermore, the Explore Scientific Focal Extender is particularly beneficial for imaging and astro-photography. You can introduce accessories like a flip mirror or filter wheel between the Focal Extender and a CCD camera without worrying about altering the magnification. This is due to the extender's unique design, which ensures the magnification remains constant, even if the distance to the focused image increases.In essence, the Explore Scientific 5x Barlow Focal Extender is a durable, reliable tool that offers consistent, high magnification for both visual observations and imaging applications. Whether you're a seasoned astronomer or a budding stargazer, this product is sure to enhance your exploration of the universe.

Because capturing the perfect shot should never be limited by your equipment, the CM-EF-FX Booster is an innovative 0.71x Focal Reducer Electronic AF Lens Mount Adapter that seamlessly bridges your Canon EF/EF-S lenses with your Fujifilm FX-Mount Camera. This high-quality adapter not only reduces the focal length and increases the aperture, but it also enhances light intake, ensuring your images are bright and vivid.With its built-in USB port, this adapter is future-proof, allowing for easy firmware updates that enhance functionality or address any software bugs. The user-friendly design ensures that you can keep your adapter up-to-date with the latest features, ensuring compatibility and performance longevity.The adapter's support for the auto-focus function is both fast and stable, providing you with the clarity and precision you need for professional-looking photographs. The electronic aperture control offers an adjustable exact aperture dial, giving you full control over your exposure settings for a more professional shooting experience.Additionally, the support for IS (Image Stabilization) function means that even in motion, your pictures remain as clear and sharp as if the scene were still. This feature is indispensable for photographers who are on the move and need to capture high-quality images without the blur caused by camera shake.The adapter's gold-plated contacts ensure great conductivity for a reliable connection between your lens and camera. The 1/4" detachable foot stand is not only convenient for connecting to tripods and other supports, but it also provides stability during use.Constructed from durable aluminum alloy, the CM-EF-FX Booster is both powerful and stable. Its delicate design does not compromise on robustness, ensuring that your adapter can withstand the rigors of frequent use.Whether you're a professional photographer or an enthusiast looking to expand your lens options, this compact and durable adapter is the perfect addition to your camera bag. It allows you to maximize the potential of your Canon lenses on a Fujifilm FX camera body, ensuring that your creative vision is never hindered by compatibility issues.

The Focal Point Primed Polyurethane Panel Moulding Kit is a versatile design element that's perfect for, but not limited to, use as wainscot. Use it to add interest to any wall or ceiling. Create your own size and design by cutting or adding additional lengths of panel moulding. Size: large. Color: White Primed.

Under the Fujinon HF-HA-1S series, discover a high-resolution, 1.5-megapixel C-mount lens designed specifically for 2/3" sensors. This lens boasts a 16mm focal length and an impressive 6.2m pixel pitch, ensuring sharp, clear images in a variety of settings. The standout feature of this lens is the Fujinon's proprietary "Anti-shock & Vibration" technology. This unique feature provides superior vibration mitigation and shock absorption, making the lens an excellent choice for machine vision and robotics applications where stability is paramount. Despite these robust features, the lens maintains a compact form factor, with an outer diameter of just 29.5mm. This compact design ensures compatibility with a wide range of cameras and imaging systems, enhancing its versatility. The lens also features a low F-number of F1.4, which guarantees clear, bright images even in low-light conditions. This makes it a reliable choice for various settings and environments. Incorporating an original mechanical design, the Fujinon HF-HA-1S lens offers exceptional vibration-resistance and impact-resistance. This durability, combined with its high-quality optics and advanced anti-shock technology, makes it a versatile, reliable, and affordable choice for professionals in the field of machine vision and robotics.

0.85x Focal Reducer/Corrector for Sky-Watcher PRO 80 ED APO is designed for serious Astro-Imagers. Optimized for the Sky-Watcher PRO 80 ED APO, this superb quality accessory effectively reduces the telescope's focal length by a factor of 0.85x and provides much improved field-edge correction.

Unveil the mysteries of the universe this Christmas with our Telescope for Adults Astronomy Beginners. Designed with a 70mm aperture and 400mm focal length, this professional refractor telescope offers exceptional clarity and detail, making it the ideal tool for aspiring astronomers. Embark on a journey through the stars this Christmas with our 70mm Aperture and 400mm Focal Length Professional Refractor Telescope. Order yours today and give the gift of the universe to your loved ones.

Featuring a chic rectangular top, this mirror brings timeless elegance to any room. Ideal as a focal point, its refined silhouette enhances both modern and classic interiors. It's more than a mirror-it's a decorative statement piece that lifts your space and mood.