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This is a very clever device. By using three perfectly aligned laser beams it simulates the parallel rays coming from a distant star. The beams then pass through the telescope twice to amplify any error in the entire system making even small miscollimation errors readily seen and fixed. David's done his homework on this one coming up with a very ingenious answer to daytime collimation of an SCT. Craig Stark Ph. D. Associate Professor and Founder of Stark Labs & PHD Guiding We have used the HOTECH Advanced CT Laser Collimator on our CDK Telescope to set the initial primary to secondary collimation with good result. HoTech's elegant design and high quality construction allows for ease of setup and makes this an invaluable tool for collimating a Cassegrain Telescope. Allan Keller PlaneWave Instruments Innovation brings Affortable and Portable Collimation into Reality Since the invention of the Cassegrain Telescope in 1672 by the French sculptor Sieur Guillaume Cassegrain the Cassegrain Telescope has evolved into various derivative designs such as the more popular Ritchey-Chrtien Dall-Kirkham Schmidt-Cassegrain and Maksutov-Cassegrain. The designs have gained their popularity because of their compact and simple to produce design. With different designs star collimation is and has always been the only effective method to collimate for Cassegrain telescope owners.Now backyard astronomers have an alternative to achieve excellent collimation conveniently using the Advanced CT Laser Collimator. The Advanced CT Laser Collimator brings the collimating star to your telescope within arm reaching distance. With its short range capability you can perform collimation indoors - day or night - without being subjected to weather conditions. And best of all this new collimator utilizes a clear and simple-to-read large target display for the telescope alignment diagnostic. This large target display is positioned within a short focal distance of the telescope which all The A80Mf is an Achromatic Refractor with 80 mm (3.2) of aperture. Its focal length is 910 mm (3 ft.) with an f ratio of 11.4. Its light gathering is 130 times better than the human eye and has a maximum (realistic) power of 144x. It weighs about 5.5 lbs. The A80Mf OTA (Optical Tube Assembly) comes complete with: Vixen A80Mf 80 mm f/11.4 optical tube A 6 x 30 power finder telescope attaches to the main scope to help you center the object. A 20 mm eyepiece for general viewing. A 6.3 mm eyepiece for those really clear nights for high-power viewing. A diagonal prism that connects the eyepiece to the telescope. A dew/sun shield. A complete tube rings and dovetail plate to quickly attach the A80Mf to one of the optional Vixen mounts. JMI Medium Size Universal Wheeley BarsAdjusts to fit tripods with tip-to-tip distance from 33 Guard it!If you own a CGE NexStar 8i or NexStar 8 SE telescope you'll want to make sure you protect your investment. This premium case will help do it.Unbreakable watertight dustproof chemical resistant and corrosion proof this premium case offers total protection for your equipment. It is made of ultra-high-impact structural copolymer that's extremely strong and durable. The case's exclusive 1/4-inch (6.4 mm) neoprene O-ring and ABS latches seal perfectly. There's even an automatic purge valve for quick equalization after changes in atmospheric pressure. The case is lined with die cut high-density foam for custom fitting.* It features large handles and is equipped with wheels for easy transportation. Inside dimensions are 29 x 17 3/4 x 9 1/4 inches. Weight is 27.5 pounds. Made in the USA. *For storing the CGE mount and pier you must use the case with the foam found in the original CGE mount packaging. Protect your telescope investment as you travel with the Jims Mobile (JMI) Telescope Case for Celestron 9.25- and 11-inch CPC. The case includes four lockable latches for the removable cover (no hinge) three steel-reinforced handles and die-cut foam lining with compartments for telescope eyepieces and accessories. It can be carried (requires two people) or pulled using the attached 10-inch wheels. Both the finder scope and hand unit must be detached and inserted into protective pouches (included) and placed inside the case.Outside dimensions of the case are approximately 42L x 25W x 26.75H inches and its empty weight is approximately 36 pounds. The shipping box is approximately 26.25L x 19W x 38.5H inches.About JMI TelescopesJMI Telescopes (Jim's Mobile Inc.) is a world-renowned manufacturer of astronomical telescopes and after-market accessories for the amateur and professional astronomer. JMI produces a variety of unique products that cannot be found anywhere else. JMI is located in Lakewood Colo. ADM Accessories LOS-VIX Converts the popular Vixen style dovetail saddle to the Losmandy style saddle. Simply attach the saddle adapter to your moun using the mount locking screw. The saddle is 7 long and has two locking screws. The saddle is spring loaded making installation and removal of the telescope easier. Everything is black anodized and stainless steel for ultra good looks and maximum durability. Mini dovetail included. Works with all mounts that utilize the Vixen style dovetail. Meade 8 Inch LX200-ACF Advanced Coma-Free Telescope with UHTC The most widely used research telescope on earth now comes with the most advanced optical system. Meade's LX200-ACF brings Advanced Coma-Free (ACF) optics within reach of aspiring astronomers everywhere. Nearly every observatory reflector in the world uses an aplanatic (coma-free) optical system like the Ritchey-Chrtien (RC) including NASA's Hubble Space Telescope. Now you can own optics similar to what the professionals use. The LX200-ACF includes all the field-proven features of the LX200 including GPS Primary Mirror Lock Oversized Primary Mirror SmartDrive Smart Mount AutoStar II and more. Plus the LX200-ACF comes with observatory-class optics and a Series 4000 26mm Super Plssl eyepiece. The new LX200-ACF: It's the biggest news in astronomy since well the LX200. The advanced in Advanced Coma-Free.A traditional Ritchey-Chrtien (RC) is a type of reflector that delivers a coma-free flat field of view via hyperbolic primary and secondary mirrors. RC telescopes (from a variety of manufacturers) are found in most of the world's top observatories and NASA's Hubble Space Telescope. Because the mirrors in these telescopes have always been very expensive to make few amateur astronomers could enjoy them. Fortunately Meade engineers developed a radical new Advanced Coma Free design by combining a hyperbolic secondary mirror with a corrector-lens-and-spherical-primary-mirror combination that performs as one hyperbolic element. This ACF design produces a coma-free flat field of view that rivals traditional RC telescopes at a fraction of the cost. The design even eliminates diffraction spikes and improves astigmatism both of which are inherent in the traditional ACF design. When reviewing Meade's LX200-ACF Advanced Coma Free Sky and Telescope magazine said It does indeed perform like a Ritchey-Chrtien. The difference between the off-axis images (compared to a Schm For professional-level stability! You've spent years developing your professional-level photographic technique all to help you capture the perfect shot. And when the opportunity for that shot comes you'll want to have your camera on firm footing. The Zhumell Professional Tripod will put it there. High Performance Features Includes quick-release mounting plate Weight rating of 8.5 lbs. to handle heavy cameras binoculars spotting scopes and telescopes With the Zhumell Professional Tripod and a favorite camera a photographer is ready to capture anything. So enjoy the perfect moment. And with the help of the Zhumell Professional Tripod capture it so the rest of us can enjoy it too. A must have for lunar observing in telescopes with apertures of 4 inches or larger. A full moon's light through the eyepiece of your telescope can be blinding. A moon filter acts like a pair of sunglasses! Dramatically reducing glare brightness and lets you observe the lunar surface comfortably. Craters on the lunar surface stand out in better detail and definition. The Meade series 4000 ND96 Moon Filter is 1.25 inch format and manufacturered from crown optical glass. Anti-reflection coatings on both sides and is mounted in a machined aluminum cell. Filter threads into the barrels of nearly all 1.25 inch eyepieces.

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For NexStar 4SE and for all C90 Spotting Scopes. A T-Adapter allows you to attach your 35mm SLR camera to the prime focus of your telescope or spotting scope. This arrangement is used for terrestrial photography and short exposure lunar and planetary photography. It can also be used for long exposure deep-sky photography when using a separate guidescope. Both a T-Adapter and T-Ring are required to mount a 35mm SLR camera to your instrument
For NexStar 4SE and for all C90 Spotting Scopes. A T-Adapter allows you to attach your 35mm SLR camera to the prime focus of your telescope or spotting scope. This arrangement is used for terrestrial photography and short exposure lunar and planetary photography. It can also be used for long exposure deep-sky photography when using a separate guidescope. Both a T-Adapter and T-Ring are required to mount a 35mm SLR camera to your instrument
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