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Experience the wonders of the universe with the NexStar 8 SE Schmidt-Cassegrain Computerized Telescope from Celestron, a leading name in high-quality optical instruments. This advanced, user-friendly telescope is the perfect tool for both novice and intermediate astronomers, offering superior views of celestial bodies at an affordable price.The NexStar 8 SE is a reimagining of our founder Tom Johnson's vision, who revolutionized the field of astronomy in the 1970s with the creation of the classic Celestron 8. This updated model retains the signature orange-tube design and combines it with cutting-edge features for the 21st-century stargazer.With a full 8 inches of aperture, the NexStar 8 SE offers exceptional light-gathering ability, revealing intricate details in even the faintest celestial objects. From the cloud bands on Jupiter to the spiral arms of the Whirlpool Galaxy, this telescope brings the cosmos to your backyard. The NexStar 8 SE features a revolutionary single fork arm mount, a patented design unique to Celestron. This innovative feature ensures the telescope is not only portable but also quick and easy to set up. Despite its robust construction, the NexStar SE disassembles into compact, lightweight pieces for convenient transport, even in small vehicles.The NexStar 8 SE is equipped with a NeXStar+ hand control, allowing you to locate over 40,000 celestial objects with ease. The SkyAlign process simplifies alignment, requiring you to just center three bright objects in your eyepiece and press ALIGN. For an even more effortless experience, attach our StarSense AutoAlign, and your NexStar SE will align itself!This telescope is designed to grow with you, compatible with a range of high-tech accessories. Control your telescope using your iPhone or iPad with our SkyQ Link, or add GPS functionality with SkySync. For those interested in astroimaging, the NexStar SE is Fastar-compatible for ultra-fast, wide-field imaging. Whether you're embarking on your first stargazing session or have years of experience, the NexStar 8 SE Schmidt-Cassegrain Computerized Telescope is your trusted companion in exploring the universe.

The goal of this guide and manual is to provide a practical and brief overview of the theory on computerized adaptive testing (CAT) and multistage testing (MST) and to illustrate the methodologies and applications using R open source language and several data examples.  Implementation relies on the R packages catR and mstR that have been already or are being developed by the first author (with the team) and that include some of the newest research algorithms on the topic. The book covers many topics along with the R-code: the basics of R, theoretical overview of CAT and MST, CAT designs, CAT assembly methodologies, CAT simulations, catR package, CAT applications, MST designs, IRT-based MST methodologies, tree-based MST methodologies, mstR package, and MST applications.  CAT has been used in many large-scale assessments over recent decades, and MST has become very popular in recent years.  R open source language also has become one of the most useful tools for applications in almost all fields, including business and education. Though very useful and popular, R is a difficult language to learn, with a steep learning curve.  Given the obvious need for but with the complex implementation of CAT and MST, it is very difficult for users to simulate or implement CAT and MST.  Until this manual, there has been no book for users to design and use CAT and MST easily and without expense; i.e., by using the free R software.  All examples and illustrations are generated using predefined scripts in R language, available for free download from the book's website.

Experience the wonders of the universe with the NexStar 8 SE Schmidt-Cassegrain Computerized Telescope from Celestron, a leading name in high-quality optical instruments. This advanced, user-friendly telescope is the perfect tool for both novice and intermediate astronomers, offering superior views of celestial bodies at an affordable price.The NexStar 8 SE is a reimagining of our founder Tom Johnson's vision, who revolutionized the field of astronomy in the 1970s with the creation of the classic Celestron 8. This updated model retains the signature orange-tube design and combines it with cutting-edge features for the 21st-century stargazer.With a full 8 inches of aperture, the NexStar 8 SE offers exceptional light-gathering ability, revealing intricate details in even the faintest celestial objects. From the cloud bands on Jupiter to the spiral arms of the Whirlpool Galaxy, this telescope brings the cosmos to your backyard. The NexStar 8 SE features a revolutionary single fork arm mount, a patented design unique to Celestron. This innovative feature ensures the telescope is not only portable but also quick and easy to set up. Despite its robust construction, the NexStar SE disassembles into compact, lightweight pieces for convenient transport, even in small vehicles.The NexStar 8 SE is equipped with a NeXStar+ hand control, allowing you to locate over 40,000 celestial objects with ease. The SkyAlign process simplifies alignment, requiring you to just center three bright objects in your eyepiece and press ALIGN. For an even more effortless experience, attach our StarSense AutoAlign, and your NexStar SE will align itself!This telescope is designed to grow with you, compatible with a range of high-tech accessories. Control your telescope using your iPhone or iPad with our SkyQ Link, or add GPS functionality with SkySync. For those interested in astroimaging, the NexStar SE is Fastar-compatible for ultra-fast, wide-field imaging. Whether you're embarking on your first stargazing session or have years of experience, the NexStar 8 SE Schmidt-Cassegrain Computerized Telescope is your trusted companion in exploring the universe.

Celestrons signature orange-tube telescope combines advanced features and excellent optics in one easy-to-use system, the NeXStar 6SE. Its the perfect choice for your first serious telescope, offering striking views at an economical price.Our Founders Vision, Reimagined for the 21stCenturyIn the 1970s, Celestrons Schmidt-Cassegrain telescopes brought the hobby of astronomy to the masses and established Celestron as the worlds premier telescope maker. Our founder, Tom Johnson, invented Celestrons proprietary method of producing Schmidt corrector plates for superior views and maximum portability. Johnson believed in creating high-quality optical instruments at an affordable price, and inspired a generation of amateur astronomers.Four decades later, we've improved upon this design by adding cutting-edge features, while staying true to our founders intent.View the Universes Most Impressive Celestial Objects The 6SEs six-inch primary mirror packs enough light-gathering ability to observe the best that the solar system has to offer: Cassini's Division in Saturn's rings, the cloud bands on Jupiter, and geographic features on the surface of the Moon. When it comes to deep sky objects, take your 6SE to a dark-sky site and you'll see hundreds of pinpoint stars in the Hercules Globular Cluster, the spiral arms of the Whirlpool Galaxy, and more.Revolutionary Single Fork Arm Mount We know the best telescope is the one you will use most often. That's why Celestrons engineers created NeXStar SEs unique, patented single fork arm mount. Its perfectly portable and makes setup quick and easy. What's more, the NeXStar SE breaks down into several lightweight and compact pieces, making it easy to transport, even in small vehicles. You'll have no problem getting the NeXStar SE to your favorite observing site, or setting it up quickly in your backyard.Of course, its what's inside the mount that really counts. Sturdy construction from high-quality components give NeXStar SE the pointing and tracking accuracy needed to observe and follow your favorite targets with push-button ease. Use the included NeXStar+ hand control to locate over 40,000 celestial objects, or take a Sky Tour and let your telescope show you the best objects currently visible.Aligning your telescope is simple and painless, too, thanks to SkyAlign. This process makes alignment as easy as 1-2-3: just center three bright objects in your eyepiece and press ALIGN. For even easier alignment, attach our StarSense AutoAlign and your NeXStar SE aligns itself!Advanced Features Let the NeXStar SE Grow with You The NeXStar SE is compatible with all the high-tech accessories advanced users love. Provide GPS coordinates to your telescope with SkySync, or add automatic alignment functionality with StarSense AutoAlign.For planetary imaging, pair your NeXStar 6SE with one of our Skyris cameras. Or, experiment with wide-field deep sky astroimaging by replacing the telescopes secondary mirror with a DSLR or astronomical...

What sets the NexStar 4 SE Maksutov-Cassegrain Computerized Telescope apart is its unique blend of advanced features and superior optics, all housed in Celestron's signature orange-tube design. This user-friendly system is an ideal choice for both novice and experienced astronomers, offering breathtaking views of the cosmos at an affordable price.This telescope is a modern interpretation of our founder, Tom Johnson's vision from the 1970s. Johnson revolutionized the world of astronomy with Celestron's Schmidt-Cassegrain telescopes, making high-quality optical instruments accessible to all. Today, we continue to honor his legacy by enhancing this design with innovative features, while maintaining our commitment to quality and affordability.The NexStar 4SE's four-inch primary mirror boasts impressive light-gathering capabilities, allowing you to explore the best of our solar system. Witness the intricate rings of Saturn, the dynamic cloud bands on Jupiter, and the detailed geographic features on the Moon's surface. For deep sky objects, transport your 4SE to a dark-sky site and marvel at the hundreds of stars in the Hercules Globular Cluster, the spiral arms of the Whirlpool Galaxy, and beyond.Our revolutionary single fork arm mount, a patented design unique to the NexStar SE series, ensures portability and quick setup. The telescope disassembles into compact, lightweight pieces, making it easy to transport even in small vehicles. This design, coupled with sturdy construction from high-quality components, provides the pointing and tracking accuracy needed to observe and follow celestial objects with ease.The NexStar 4SE comes with a NeXStar+ hand control, allowing you to locate over 40,000 celestial objects. The SkyAlign feature simplifies the alignment process, requiring you to just center three bright objects in your eyepiece and press ALIGN. For even more convenience, attach our StarSense AutoAlign for automatic telescope alignment.The NexStar SE is designed to grow with you, compatible with high-tech accessories like SkySync for GPS coordinates and StarSense AutoAlign for automatic alignment. For astroimaging enthusiasts, the 4SE's built-in wedge enables long exposure tracking. The telescope's secondary mirror can be replaced with a DSLR or astronomical CCD camera for wide field images captured at f/2 using a Fastar/HyperStar lens assembly. For imaging the Moon and planets, pair your NexStar 4SE with one of our Skyris cameras.From your first observing session and for years to come, the NexStar 4 SE Maksutov-Cassegrain Computerized Telescope is your reliable partner in exploring the wonders of the universe.

What sets the NexStar 4 SE Maksutov-Cassegrain Computerized Telescope apart is its unique blend of advanced features and superior optics, all housed in Celestron's signature orange-tube design. This user-friendly system is an ideal choice for both novice and experienced astronomers, offering breathtaking views of the cosmos at an affordable price.This telescope is a modern interpretation of our founder, Tom Johnson's vision from the 1970s. Johnson revolutionized the world of astronomy with Celestron's Schmidt-Cassegrain telescopes, making high-quality optical instruments accessible to all. Today, we continue to honor his legacy by enhancing this design with innovative features, while maintaining our commitment to quality and affordability.The NexStar 4SE's four-inch primary mirror boasts impressive light-gathering capabilities, allowing you to explore the best of our solar system. Witness the intricate rings of Saturn, the dynamic cloud bands on Jupiter, and the detailed geographic features on the Moon's surface. For deep sky objects, transport your 4SE to a dark-sky site and marvel at the hundreds of stars in the Hercules Globular Cluster, the spiral arms of the Whirlpool Galaxy, and beyond.Our revolutionary single fork arm mount, a patented design unique to the NexStar SE series, ensures portability and quick setup. The telescope disassembles into compact, lightweight pieces, making it easy to transport even in small vehicles. This design, coupled with sturdy construction from high-quality components, provides the pointing and tracking accuracy needed to observe and follow celestial objects with ease.The NexStar 4SE comes with a NeXStar+ hand control, allowing you to locate over 40,000 celestial objects. The SkyAlign feature simplifies the alignment process, requiring you to just center three bright objects in your eyepiece and press ALIGN. For even more convenience, attach our StarSense AutoAlign for automatic telescope alignment.The NexStar SE is designed to grow with you, compatible with high-tech accessories like SkySync for GPS coordinates and StarSense AutoAlign for automatic alignment. For astroimaging enthusiasts, the 4SE's built-in wedge enables long exposure tracking. The telescope's secondary mirror can be replaced with a DSLR or astronomical CCD camera for wide field images captured at f/2 using a Fastar/HyperStar lens assembly. For imaging the Moon and planets, pair your NexStar 4SE with one of our Skyris cameras.From your first observing session and for years to come, the NexStar 4 SE Maksutov-Cassegrain Computerized Telescope is your reliable partner in exploring the wonders of the universe.

After four decades of innovation and refinement, the NexStar 5 SE Schmidt-Cassegrain Computerized Telescope continues to uphold Celestron's reputation as the world's leading telescope maker. This high-quality, durable telescope, with its signature orange tube, is an advanced and sophisticated tool for both novice and experienced stargazers. The NexStar 5 SE boasts a 5-inch primary mirror, designed to gather ample light for striking views of the solar system's most impressive celestial objects. From the rings of Saturn to the cloud bands on Jupiter, and even the detailed geographic features on the moon's surface, this telescope brings the universe closer to you. Venture to a dark-sky site and the NexStar 5 SE reveals its prowess in observing deep sky objects. Witness the hundreds of stars in the Hercules Globular Cluster, the spiral arms of the Whirlpool Galaxy, and more. The NexStar 5 SE features a revolutionary single fork arm mount, a patented design unique to Celestron. This innovative feature ensures the telescope is portable and easy to set up. The telescope breaks down into compact, lightweight pieces, making it convenient to transport to your favorite observing site or set up in your backyard. Inside the mount, you'll find sturdy construction from high-quality components, providing the pointing and tracking accuracy needed to observe and follow your favorite celestial objects with ease. The included NexStar+ hand control allows you to locate over 40,000 celestial objects, or take a Sky Tour and let your telescope guide you to the best objects currently visible. Aligning your telescope is a breeze thanks to SkyAlign. This process simplifies alignment to a 1-2-3 step: just center three bright objects in your eyepiece and press ALIGN. For an even easier alignment, attach the StarSense AutoAlign and your NexStar SE aligns itself! The NexStar 5 SE is compatible with all high-tech accessories that advanced users love. From providing GPS coordinates with SkySync, to adding automatic alignment functionality with StarSense AutoAlign, this telescope is designed to grow with you. For those interested in astroimaging, the 5SE's built-in wedge allows for tracking long exposures. You can even replace the telescope's secondary mirror with a DSLR or astronomical CCD camera for wide field images captured at f/2 using a Fastar/HyperStar lens assembly. In summary, the NexStar 5 SE Schmidt-Cassegrain Computerized Telescope is more than just a telescope; it's your trusted companion in exploring the wonders of the universe.

After four decades of innovation and refinement, the NexStar 5 SE Schmidt-Cassegrain Computerized Telescope continues to uphold Celestron's reputation as the world's leading telescope maker. This high-quality, durable telescope, with its signature orange tube, is an advanced and sophisticated tool for both novice and experienced stargazers. The NexStar 5 SE boasts a 5-inch primary mirror, designed to gather ample light for striking views of the solar system's most impressive celestial objects. From the rings of Saturn to the cloud bands on Jupiter, and even the detailed geographic features on the moon's surface, this telescope brings the universe closer to you. Venture to a dark-sky site and the NexStar 5 SE reveals its prowess in observing deep sky objects. Witness the hundreds of stars in the Hercules Globular Cluster, the spiral arms of the Whirlpool Galaxy, and more. The NexStar 5 SE features a revolutionary single fork arm mount, a patented design unique to Celestron. This innovative feature ensures the telescope is portable and easy to set up. The telescope breaks down into compact, lightweight pieces, making it convenient to transport to your favorite observing site or set up in your backyard. Inside the mount, you'll find sturdy construction from high-quality components, providing the pointing and tracking accuracy needed to observe and follow your favorite celestial objects with ease. The included NexStar+ hand control allows you to locate over 40,000 celestial objects, or take a Sky Tour and let your telescope guide you to the best objects currently visible. Aligning your telescope is a breeze thanks to SkyAlign. This process simplifies alignment to a 1-2-3 step: just center three bright objects in your eyepiece and press ALIGN. For an even easier alignment, attach the StarSense AutoAlign and your NexStar SE aligns itself! The NexStar 5 SE is compatible with all high-tech accessories that advanced users love. From providing GPS coordinates with SkySync, to adding automatic alignment functionality with StarSense AutoAlign, this telescope is designed to grow with you. For those interested in astroimaging, the 5SE's built-in wedge allows for tracking long exposures. You can even replace the telescope's secondary mirror with a DSLR or astronomical CCD camera for wide field images captured at f/2 using a Fastar/HyperStar lens assembly. In summary, the NexStar 5 SE Schmidt-Cassegrain Computerized Telescope is more than just a telescope; it's your trusted companion in exploring the wonders of the universe.

After four decades of innovation and refinement, the NexStar 5 SE Schmidt-Cassegrain Computerized Telescope continues to uphold Celestron's reputation as the world's leading telescope maker. This high-quality, durable telescope, with its signature orange tube, is an advanced and sophisticated tool for both novice and experienced stargazers. The NexStar 5 SE boasts a 5-inch primary mirror, designed to gather ample light for striking views of the solar system's most impressive celestial objects. From the rings of Saturn to the cloud bands on Jupiter, and even the detailed geographic features on the moon's surface, this telescope brings the universe closer to you. Venture to a dark-sky site and the NexStar 5 SE reveals its prowess in observing deep sky objects. Witness the hundreds of stars in the Hercules Globular Cluster, the spiral arms of the Whirlpool Galaxy, and more. The NexStar 5 SE features a revolutionary single fork arm mount, a patented design unique to Celestron. This innovative feature ensures the telescope is portable and easy to set up. The telescope breaks down into compact, lightweight pieces, making it convenient to transport to your favorite observing site or set up in your backyard. Inside the mount, you'll find sturdy construction from high-quality components, providing the pointing and tracking accuracy needed to observe and follow your favorite celestial objects with ease. The included NexStar+ hand control allows you to locate over 40,000 celestial objects, or take a Sky Tour and let your telescope guide you to the best objects currently visible. Aligning your telescope is a breeze thanks to SkyAlign. This process simplifies alignment to a 1-2-3 step: just center three bright objects in your eyepiece and press ALIGN. For an even easier alignment, attach the StarSense AutoAlign and your NexStar SE aligns itself! The NexStar 5 SE is compatible with all high-tech accessories that advanced users love. From providing GPS coordinates with SkySync, to adding automatic alignment functionality with StarSense AutoAlign, this telescope is designed to grow with you. For those interested in astroimaging, the 5SE's built-in wedge allows for tracking long exposures. You can even replace the telescope's secondary mirror with a DSLR or astronomical CCD camera for wide field images captured at f/2 using a Fastar/HyperStar lens assembly. In summary, the NexStar 5 SE Schmidt-Cassegrain Computerized Telescope is more than just a telescope; it's your trusted companion in exploring the wonders of the universe.

Using accessories such as cameras, Lens Shades, Tele-Extenders and the 2" Diagonal will affect the balance of your Celestron Schmidt-Cassegrain telescope. Counterweights restore proper balance, increasing ease in handling and improved tracking accuracy.

Where astronomy meets innovation, the CPC Deluxe 1100 HD Computerized Telescope stands as a testament to Celestron's commitment to high-quality, durable, and advanced technology. This sophisticated telescope, the largest in the CPC Deluxe HD series, boasts an impressive 11-inch aperture, providing almost 90% more light-gathering power than the 8" model and over 40% more than the 9.25". The telescope's superior EdgeHD optical system, paired with a newly designed fork mount, delivers high-definition, wide-field, astrograph-quality images. The EdgeHD optics ensure pinpoint accuracy even with your widest field eyepiece, allowing you to explore the Messier Catalog objects and hundreds of other NGC, IC, and Caldwell objects with unparalleled clarity. The CPC Deluxe 1100 HD is equipped with an internal GPS receiver that automatically downloads the date and time from orbiting satellites and pinpoints its exact location on Earth. This eliminates the need for manual data entry and makes aligning the telescope as easy as 1-2-3. The telescope's database is packed with over 40,000 celestial objects, including Messier objects, the Caldwell Catalog, as well as NGC Galaxies, nebulae, and planets. The user-friendly database, combined with the telescope's advanced software features like the Hibernate function, makes the CPC Deluxe 1100 HD an ideal instrument for a permanent observatory facility. Despite its advanced features and large aperture, the CPC Deluxe 1100 HD remains one of Celestron's most portable astronomical telescopes. With conveniently located carrying handles and an instrument weight of 66 lbs, this telescope is easy to set up in your backyard or transport to your favorite dark sky location. The CPC Deluxe 1100 HD also comes with a deluxe accessory kit that includes five 1.25" Plossl eyepieces, a 2x Barlow lens, and a filter set. These accessories, housed in a metal, foam-lined carry case, expand the functionality and enjoyment of your telescope, providing an incredible combination of power and wide field of view. Whether you're a serious astro imager or a passionate stargazer, the CPC Deluxe 1100 HD Computerized Telescope offers a sophisticated, high-quality, and innovative solution for exploring the night sky.

If you're an astronomy enthusiast looking for a reliable power solution for your computerized telescope, our AC Power Adapter is the perfect fit. Designed to provide uninterrupted power supply, this adapter lets you enjoy hours of stargazing without the worry of battery drainage. Ideal for use at home or any location with a wall outlet, this high-quality AC adapter offers a hassle-free experience, outperforming batteries, especially in cooler temperatures where battery charge can deplete rapidly.This durable 2.5 amp AC Adapter is specifically engineered for compatibility with a wide range of Celestron computerized telescopes. Whether you own an LCM Series, NeXStar SLT Series, NeXStar SE Series, SkyProdigy Series, Advanced Series, Advanced VX Series, or CPC Series, this adapter ensures seamless power supply. It's also compatible with the CPC Deluxe HD Series, making it a versatile and convenient choice for all your celestial explorations.While this user-friendly adapter is sufficient for most visual observing with a balanced telescope, for astroimaging enthusiasts using additional equipment, we recommend the 5 amp adapter (product #18780). Enjoy the night sky without interruption with our AC Power Adapter for all computerized telescopes.

It's time to explore the cosmos with the high-quality and advanced CPC Deluxe 925 HD Computerized Telescope from Celestron. This powerful telescope boasts a large 9.25-inch aperture, allowing for an impressive 33% more light gathering than an 8-inch model. This results in brighter, clearer images of celestial objects, making it a favorite among both astro imagers and discerning visual observers.The innovative EdgeHD optical system enhances the telescope's performance, offering astrograph-quality images across a wide field of view. This system is specifically designed to reduce aberration, ensuring pinpoint accuracy even with your widest field eyepiece. Whether you're searching for Messier Catalog objects or observing hundreds of other NGC, IC, and Caldwell objects, the EdgeHD optics deliver unparalleled clarity.The CPC Deluxe 925 HD is equipped with an internal GPS receiver that automatically downloads date and time from orbiting satellites, pinpointing its exact location on Earth. This eliminates the need for manual data entry and ensures precise celestial tracking. The telescope also features Celestron's revolutionary SkyAlign technology, which makes aligning the telescope as easy as locating three bright celestial objects.With a celestial object database containing over 40,000 entries, including Messier objects, the Caldwell Catalog, NGC Galaxies, nebulae, and planets, you'll never run out of new celestial wonders to explore. User-definable filter limits make navigating this expansive database quick and easy, allowing you to filter out objects outside of your local horizon.The telescope comes standard with Celestron's top-of-the-line, wide-field Luminos eyepiece, optimized to deliver pinpoint images when used with a flat field telescope. Additionally, all EdgeHD optical tubes are equipped with a removable secondary mirror for fast f/2 CCD imaging, allowing for exposure times 25 times faster than at f/10 and a field of view five times wider.In summary, the CPC Deluxe 925 HD Computerized Telescope is a durable, innovative, and powerful tool for anyone passionate about astronomy and astro imaging. Its advanced features and high-definition eyepiece make it a superior choice for viewing and tracking celestial objects in the night sky.

What sets the CPC Deluxe 925 HD Computerized Telescope apart is its innovative design and advanced features. This high-quality telescope, the most portable in Celestron's top-tier fork-mounted astronomical telescopes, is equipped with the new EdgeHD optical system and a newly designed fork mount. The telescope's large 9.25-inch aperture, coupled with premium StarBright XLT coatings, provides over 800 times the light gathering power than the unaided eye. This allows for detailed views of celestial objects, from the surface of Jupiter to the rings of Saturn, and even distant celestial bodies like Uranus, Neptune, and Pluto. The EdgeHD optical system is designed to deliver pinpoint images even with your widest field eyepiece. It's perfect for searching all of the Messier Catalog objects and observing hundreds of other NGC, IC, and Caldwell objects with amazing clarity. For astro imaging, the EdgeHD optics produce aberration-free images across your favorite CCD or DSLR camera. The telescope's internal GPS receiver automatically downloads the date and time from orbiting satellites and pinpoints its exact location on Earth. This eliminates the need for manual data entry. Once the telescope's position is established, aligning the telescope is as simple as pointing it to three bright celestial objects. The NeXStar software technology will then model the night sky to determine the position of every star, planet, and celestial object above the horizon. The CPC Deluxe 925 HD Computerized Telescope comes with a deluxe accessory kit that includes five 1.25" Plossl eyepieces, a 2x Barlow lens, and a filter set. These accessories expand the functionality and enjoyment of your telescope, providing a range of magnification options and enhancing the details on a planet's surface or its cloud structure. Despite its large aperture, this telescope is portable enough to set up in your backyard or take with you to your favorite dark sky location, thanks to its conveniently located carrying handles and a weight of only 43 lbs. Whether you're a seasoned astronomer or a beginner, the CPC Deluxe 925 HD Computerized Telescope offers a sophisticated and versatile tool for astronomical observation.

What you're looking at is the future of astronomical observation, the CPC-800 GPS XLT 8" Schmidt-Cassegrain Computerized Telescope Wifi Kit with Skyportal Wifi Module. This advanced, high-tech telescope is part of Celestron's new CPC Series, featuring revolutionary SkyAlign Alignment Technology. This innovative system redefines the experience for amateur astronomers, offering quick and simple alignment, GPS capabilities, and unsurpassed optical quality. Designed for ease of set-up and use, this powerful telescope boasts an ergonomic design and enhanced computerization, making it a sophisticated choice for astronomy enthusiasts. The 8-inch aperture allows for more light to enter the telescope, resulting in brighter and clearer images, perfect for both visual observation and astrophotography.The kit also includes the Celestron Skyportal Wifi Module, a game-changer in the world of astronomy. This module transforms your smartphone or tablet into your personal planetarium and observatory. Simply plug the Wifi module into your telescope's Hand Control or AUX port and connect to its wireless signal with your device. This allows for wireless control of your telescope, guiding you through the alignment process and slewing to any celestial object with a simple tap.As the SkyPortal Wifi Module slews your telescope to an object, you can listen to hundreds of included audio descriptions on your device, enriching your understanding of the universe with information on the history, mythology, and key features of the most popular celestial objects. The SkyPortal Wifi Module also includes the Sky Tour feature, which displays a list of the best objects to view based on your exact time and location. There's no need to input GPS coordinates or set the time and date, as SkyPortal WiFi takes this information directly from your device. The SkyPortal Wifi Module is powered by Celestron's brand new planetarium app, SkyPortal. Available free on the Apple App Store and Google Play, SkyPortal offers an intuitive user interface with a robust database of more than 100,000 celestial objects. This allows you to plan your observing session before you set up your telescope, viewing lunar transits and other notable events up to 100 years into the future. Experience the universe like never before with the CPC-800 GPS XLT 8" Schmidt-Cassegrain Computerized Telescope Wifi Kit with Skyportal Wifi Module.

You can explore the universe in stunning detail with the CPC Deluxe 800 HD 8" Schmidt-Cassegrain Computerized Telescope. This high-end astronomical instrument, the most portable in Celestron's top-tier range, is equipped with a newly designed fork mount and the innovative EdgeHD optical system. Whether you're an avid stargazer or a dedicated astro-imager, this telescope is designed to meet your needs. With an impressive 8-inch aperture and Celestron's premium StarBright XLT coatings, the CPC Deluxe 800 HD offers over 800 times the light gathering power of the naked eye. This allows you to observe intricate details on the surface of Jupiter, Saturn's Cassini Division, and even the distant Uranus, Neptune, and Pluto.Despite its large aperture, this telescope remains conveniently portable. Weighing only 43 lbs and featuring strategically placed carrying handles, it's easy to set up in your backyard or transport to your favorite dark sky location. The EdgeHD optical system is designed to deliver high-definition, wide-field, astrograph-quality images. As a visual instrument, it provides pinpoint images even with your widest field eyepiece. For astro-imaging, the EdgeHD optics produce aberration-free images across your preferred CCD or DSLR camera. The CPC Deluxe HD Series comes with an internal GPS receiver that automatically downloads the date, time, and exact location from orbiting satellites, eliminating the need for manual input. Once the GPS has established the telescope's position, Celestron's revolutionary SkyAlign technology makes aligning the telescope as easy as pointing it to three bright celestial objects. The telescope's remote hand control provides direct access to a user-friendly database containing over 40,000 celestial objects, including the Messier and Caldwell Catalogs, as well as NGC Galaxies, nebulae, and planets. User-definable filter limits make navigating this expansive database quicker and easier. All EdgeHD optical tubes are equipped with a removable secondary mirror for fast f/2 CCD imaging, offering Fastar Versatility. This feature allows for exposure times that are 25 times faster, making your astro-imaging experience more efficient. In summary, the CPC Deluxe 800 HD 8" Schmidt-Cassegrain Computerized Telescope is a versatile, high-quality instrument designed for both visual observation and astro-imaging, making it a perfect choice for astronomy enthusiasts of all levels.

When exploring the cosmos, the CPC-1100 GPS XLT 11" Schmidt-Cassegrain Computerized Telescope is a game-changer. This advanced telescope, part of Celestron's innovative CPC Series, is equipped with revolutionary SkyAlign Alignment Technology. This state-of-the-art feature simplifies the alignment process, making it quick and straightforward, even for amateur astronomers. This 11-inch computerized GPS SCT telescope is not just about ease of use; it also boasts unsurpassed optical quality. The high-grade optics deliver crisp, clear views of celestial bodies, enhancing your stargazing experience. Whether you're observing the moon's craters or distant galaxies, the CPC-1100 GPS XLT offers exceptional clarity and detail. The telescope's advanced engineering is evident in its robust and steady mount. Despite its size, the telescope is designed for easy setup and use, making it a popular choice among both beginners and seasoned astronomers. The ergonomic design ensures comfortable viewing, while the enhanced computerization offers precise tracking and locating of celestial objects. The built-in GPS feature is another highlight of the CPC-1100 GPS XLT. This feature ensures accurate positioning and alignment, saving you the hassle of manual adjustments. The GoTo feature is a useful tool that allows you to easily navigate to specific celestial bodies. In summary, the CPC-1100 GPS XLT 11" Schmidt-Cassegrain Computerized Telescope is a blend of advanced technology, superior optics, and user-friendly design. It's an investment in an extraordinary stargazing experience that is, quite literally, out of this world.