Celestron 8" SCT optical tube, CG5/AVX dovetail

$999.00

Availability: In stock

This 8" SCT optical tube has advanced Starbright XLT multicoatings for Celestron's brightest images ever. It mounts directly on a Celestron CG-5, Advanced Series Go-To, or Celestron/Vixen Great Polaris German equatorial mount . . .
Our Product #: C8OTA5X
Celestron Product #: 91020-XLT
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Product Description

The Celestron C8 was the first Schmidt-Cassegrain telescope available to amateur astronomers. This 8" f/10 optical tube is the direct, but much improved, descendent of that original astronomical triumph. The rugged aluminum optical tube is only 17" long and weighs only 13 lbs., making it easy to transport and set up. An optional focal reducer (#8325) is available to bring the focal ratio down to a fast f/6.3 for CCD and 35mm photography.

Advanced Starbright XLT multicoatings are standard equipment. This coatings package includes high reflectivity multilayer aluminum mirrors enhanced with titanium dioxide for high reflectivity, plus a unique combination of magnesium fluoride and hafnium dioxide antireflection coatings on both sides of the Schmidt corrector lens. The corrector lens itself is made of high transmission water white float glass instead of conventional soda lime glass (which has 3.5% lower transmission) used in other telescopes.

Starbright XLT multicoatings visibly increase the contrast on subtle lunar, planetary, and nebula details when compared with a scope with standard multicoatings. They also give you higher light transmission for brighter deep space images and shorter exposure times during CCD and 35mm photography. Across the total visual/photographic spectrum from 400nm to 750nm, independent laboratory tests show the new Starbright XLT coatings are 16% brighter overall than even the original industry-standard Starbright multicoatings.

The optical tube comes with a 6 x 30mm straight-through achromatic finderscope and mounting bracket. The finder has a wide 7° field of view. It focuses by loosening the trim ring behind the objective lens cell, screwing the lens cell in or out to focus, and tightening the trim ring to lock in the correct focus. Also included is a removable 1.25" visual back that holds visual and photographic accessories such as a star diagonal, tele-extender, etc. A 1.25" prism type star diagonal is also standard, as is a 1.25" 25mm Plössl eyepiece. This eyepiece provides a magnification of 81x, with a 0.59° field that's almost 20% larger than the full moon.

A 1.75" wide dovetail slide bar runs the length of the tube for mounting the optical tube on a Celestron CG-5, Advanced Series Go-To, or Celestron/Vixen Great Polaris German equatorial mount. split mounting rings are also available to put the tube on another mount of the buyer's choosing. Dust covers for the optics complete the supplied accessories.

Tech Details

Aperture 8"
Focal Length 2032mm
Focal Ratio f/10
Heaviest Single Component 13 lbs.
Highest Useful Magnification 406x
Weight 13 lbs.
Optical Coatings StarBright XLT
Resolution 0.57 arc seconds
Supplied Eyepiece 25mm 1.25"
Telescope Type Schmidt-Cassegrain
View Finder 6x30
Visual Limiting Magnitude 14
Warranty 2 years

Reviews

Review by:
I have several scopes and this is by far my favorite for both observing and imaging. I know that is a fairly expansive statement for such a variety of cosmic circumstances, but it is relatively lightweight, has sharp optics, can be used with both DSLR and CCD ( or CMOS) cameras, and adapters are easily available to widen the fov and add accessories. Collimation stays in place even when traveling. Definitely cost effective, and the views are superb! (Posted on 10/23/2019)
Review by:
I have several scopes and this is by far my favorite for both observing and imaging. I know that is a fairly expansive statement for such a variety of cosmic circumstances, but it is relatively lightweight, has sharp optics, can be used with both DSLR and CCD ( or CMOS) cameras, and adapters are easily available to widen the fov and add accessories. Collimation stays in place even when traveling. Definitely cost effective, and the views are superb! (Posted on 10/23/2019)
Review by:
The C8 has so much capability for its size and cost that every amateur astronomer should have one, even if you've decided you're more into refractors or Dobs. The 2000mm focal length @f/10 provides great magnification while still being pretty forgiving to less expensive or older eyepieces. Great for planets, distant galaxies and lunar surface features. At 2/3 the weight of the 9.25" and half the weight of the 11", a C8 on a steady mount (mine is on an AVX) provides a powerful instrument that you can still move fairly easily. (Posted on 12/23/2018)
Review by:
The C8 has so much capability for its size and cost that every amateur astronomer should have one, even if you've decided you're more into refractors or Dobs. The 2000mm focal length @f/10 provides great magnification while still being pretty forgiving to less expensive or older eyepieces. Great for planets, distant galaxies and lunar surface features. At 2/3 the weight of the 9.25" and half the weight of the 11", a C8 on a steady mount (mine is on an AVX) provides a powerful instrument that you can still move fairly easily. (Posted on 12/23/2018)
Review by:
The perfect balance of aperture and weight, a C8 is a great intermediate scope. My first Planetary scope was an 8" and I never regretted not getting the 10" I was looking at. Stunning views and images of Jupiter, Saturn, Mars the Moon as well as Uranus and even the tiny Neptune. I was able to view and image them all. With a 6.3 reducer, I was able to image DSOs such as M33, ring nebula, Orion, M13, M51, M63 and more. This scope will pair well with an AVX or any mount with a 30lb or higher capacity for visual or AP. If you're just starting out and have aperture fever, the 8" will be much more manageable than a10" scope. Trust me you'll use the 8" more. Get a good micro focuser if you're doing AP and you'll have a keeper for years to come!! (Posted on 11/29/2018)
Review by:
The 8 inch light gathering capability of this telescope, makes it the perfect scope for all skill levels. The bigger they are, the heavier they are, and slowly become more unwieldy, if you like to move to different locations. But the 8 inch is a great middle ground that makes it versatile and maneuverable enough to throw in the back of your car, but powerful enough to take some amazing astro-photos. This is a great choice for anyone . (Posted on 11/25/2018)
Review by:
The C8 is relatively small and light and is easily mounted on many affordable mounts with GOTO and tracking. Collimation is simple and effective to give great views of doubles, deep sky and the solar system. (Posted on 11/15/2018)
Review by:
I have this OTA and find it offers a great deal of aperture for the cost and provides excellent views of such a variety of objects that one could have this scope, alone, for a lifetime of use. Recommended. (Posted on 11/6/2018)
Review by:
The modern Celestron C8 SCT is a wonder, capable of revealing the cosmos to the patient observer for a lifetime. Lightweight, compact and sturdy the C8 is surprisingly portable and when matched with a telescope mount with similar traits, an excellent choice for just about any night time astronomical observation. The modern generation of Celestron's C8 telescope all have excellent optics within the limits of the SCT design which is to say for most purposes very good.

If you could only have one telescope to observe the night sky with the Celestron C8 is the one that can do it all very well. This is why the C8 is the most commonly used amateur telescope by a large margin wherever you go to a star party.




(Posted on 10/24/2018)
Review by:
If there was one scope that you could own that covers all bases decently well, this would be it. When well collimated, the c8 gives superb views of planetary bodies to deep sky objects. The 8 inch aperture allows for high contrast and bright images. The f ratio is rather long for deep sky, but the reducer helps. Overall lightweight as well and can be mounted on almost any alt az and eq mount. Mirror flop also a minor issue, and you could get an electric crayford focuser to solve this problem once and for all. (Posted on 10/7/2018)
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