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  • Celestron 93635-A T-Adapter for NexStar 4GT
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Celestron 93635-A T-Adapter for NexStar 4GT


List Price: $30.00
Price: $23.99 & FREE Shipping on orders over $35. Details
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  • Allows attachment of your 35mm SLR camera to your telescope or spotting scope
  • Compatible with NexStar 4 and for all C90 Spotting Scopes
  • Excellent for terrestrial photography
  • Great for short exposure lunar and planetary photography
4 new from $17.90

Frequently Bought Together

Celestron 93635-A T-Adapter for NexStar 4GT + Celestron 93419 T-Ring for 35 mm Canon EOS Camera (Black) + Celestron 18778 AC Adapter (Black)
Price for all three: $54.43

Buy the selected items together


Product Details

  • Product Dimensions: 2 x 1 x 2 inches ; 4.2 ounces
  • Shipping Weight: 4.2 ounces (View shipping rates and policies)
  • ASIN: B00009X3UW
  • Item model number: 93635-A
  • Average Customer Review: 3.5 out of 5 stars  See all reviews (13 customer reviews)
  • Discontinued by manufacturer: Yes
  • Date first available at Amazon.com: April 30, 2002

Product Description

Allows attachment of your 35mm SLR camera to your telescope or spotting scope Compatible with NexStar 4 and for all C90 Spotting Scopes Excellent for terrestrial photography Great for short exposure lunar and planetary photography

Customer Reviews

3.5 out of 5 stars

Most Helpful Customer Reviews

23 of 24 people found the following review helpful By Technology Guy on June 27, 2006
The Celestron 93635-A T-Adapter connects the rear cell of a NexStar 4 or C90 scope to a T-ring (sold seperately) which is designed to fit your specific camera. There isn't much to the adapter -- just a threaded metal tube with a metal screw-on ring on one end. Note that you will need to use your camera in fully manual mode though the camera's internal light meter will probably function normally allowing you to set the shutter speed for a proper exposure during daylight hours.

While the T-Adapter does function as advertised, it suffers from a design flaw -- the connecting tube is too narrow causing severe vignetting (i.e., the corners of phtots are cut off and appear very dark or black) at least for a 35mm full frame camera mounted to a C90. I have not tried it with a C-sized digital camera yet. Due to the severity of vignetting, you might want to consider an alternative model of T-Adapter or, better yet, a Tele-Extender designed for Schmidt-Cassegrain telescopes such as the Orion 1.25" Standard Tele-Extender which can be used in place of a T-adapter on the C90, doesn't suffer from these sever vignetting problems and is much more versatile.

Note: A tele-extender is similar to the T-adapter but is designed to optionally allow you to place a telescope eyepiece inside - between the scope and the camera - for even higher magnification. For example, with the T-adapter, a C90 can function as a 1200mm manual camera lens. With a tele-extender, it can do the same or, by adding a 18mm eyepiece, act as a 5000mm or greater lens.
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2 of 2 people found the following review helpful By Jeff® on May 4, 2009
Verified Purchase
I got this to mount my Sony á300 to my Celestron C-130 Mak. It is just perfect for prime focus. I expected it was going to be plastic like the crappy 45° visual back eyepiece holder Celestron supplied, but it is a very well made black anodized machined aluminum piece. The camera is mounted to the scope like a rock. (A big heavy rock LOL). For less than $25 and the second to none service from Adorama, you can't go wrong.
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1 of 1 people found the following review helpful By W. Dyer on December 12, 2008
Verified Purchase
This T-adapter allows your film or digital SLR to attach to your telescope and take photographs. It is well constructed and easy to use. You will also need an adapter that fits on you camera, the two then link together. This adapter does not allow autofocus, but it didn't claim to do so. You focus via the focus device on your telescope.
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1 of 1 people found the following review helpful By jda on March 2, 2013
Verified Purchase
Perfect fit! Was very pleased with this product. Threads are smooth (and very fine be sure not to cross thread) and go on seamlessly. Did have to tighten the internal barrel but no biggie probably loosened in shipping.
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1 of 1 people found the following review helpful By H. Etchell on July 7, 2012
Verified Purchase
The product arrived in fine shape, was shipped appropriately, and is nicely made. I needed an adapter ring for my telescope and camera, but had little idea what I would get. Very pleased with the product and vendor.
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1 of 1 people found the following review helpful By HAMAD on July 24, 2008
Verified Purchase
it does the job as explained in the description
I have connected my Canon 40D to Celestron C90 using Celestron 93635-A T-Adapter and Adorama T-Mount for Canon EOS.

I took nice photos for the moon :)
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1 of 1 people found the following review helpful By Jeff Gillis on April 10, 2014
fast shipping but would not fit my older orange tube c90. will hang onto it for future upgrade in scopes
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