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Celestron f/6.3 Reducer Corrector for C Series Telescopes & T-Adapter with SCT 5, 6, 8 with 9.25, 11, 14, Black (93633-A)

  • Based on 617 reviews
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Availability: 20 left in stock
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Arrives Thursday, Jun 6
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Style: Corrector + T-Adapter


Features

  • Product 1: This combination focal reducer and field corrector lens accessory works with all Celestron 5", 6", 8", 9 1/4", 11" and 14" Schmidt-Cassegrain telescopes
  • Product 1: This clever accessory makes it possible to have a dual focal ratio instrument, without sacrificing image quality
  • Product 1: The Reducer/Corrector is f/6.3 for C5, C6, C8, C914 and C11 telescopes and f/7 for the C14 telescope
  • Product 2: The Celestron T-Adapter attaches an SLR or DSLR camera to a Schmidt-Cassegrain telescope for prime focus photography
  • Product 2: Threads on to the rear cell of Schmidt-Cassegrain telescopes
  • Product 2: T-threads accept camera brand specific T-Ring (sold separately)

Description

Celestron f/6.3 Reducer Corrector for C Series Telescopes This combination focal reducer and field corrector lens accessory works with all Celestron 5", 6", 8", 9 1/4", 11" and 14" Schmidt-Cassegrain telescopes. This clever accessory makes it possible to have a dual focal ratio instrument, without sacrificing image quality. The Reducer/Corrector is f/6.3 for C5, C6, C8, C9¼ and C11 telescopes and f/7 for the C14 telescope. If offers wide fields of view with any Schmidt-Cassegrain telescope. Used for astrophotography, it reduces exposure time by a factor of 3. Celestron doesn’t offer a f/6.3 Schmidt-Cassegrain telescope, because the design is impractical, with a large central obstruction, and resulting loss in contrast. This, added to the inability to utilize longer focal ratios for certain objects, led Celestron to design the four-element, fully multicoated f/6.3 Reducer/Corrector. Results are amazing both visually and photographically. THE 94175 REDUCER/CORRECTOR LENS IS NOT COMPATIBLE WITH CELESTRON EDGEHD OPTICAL SYSTEMS. Celestron T-Adapter with SCT 5, 6, 8 with 9.25, 11, 14, Black (93633-A) This sturdy metal T-Adapter is the accessory of choice if you’d like to attach an SLR or DSLR camera to the rear cell threads of a Schmidt-Cassegrain telescope for prime focus photography. To get started, you’ll need the appropriate T-Ring for your camera body (93402 for Nikon & 93419 for Canon EOS). Remove the lens from your camera and attach the T-ring in its place. Since the T-ring is camera-brand specific, it will snap right on just like a lens. Next, remove the diagonal and visual back from the rear cell of your telescope. Screw the Celestron T-Adapter onto the rear cell threads until secure. Now, thread the T-ring & camera onto the T-Adapter. That’s all there is to it. The camera is now using your telescope as a giant telephoto lens. The magnification will depend on the telescope’s focal length. For instance, a 300mm camera lens is considered to be pretty powerful, right? Well, if you are using an 8” SCT at prime focus, you’ve got yourself a 2000mm lens with a lot of light-gathering capability! Prime focus photography is popular for short exposure images of terrestrial objects as well as celestial objects like the Moon. If you want to do longer exposures of deep sky objects with this method, we suggest using a separate guidescope or off-axis guider and an equatorial mount.

Brand: Celestron


Telescope Mount Description: Equatorial Mount


Finderscope: Reflex


Lens Coating Description: Fully Multi-Coated


Date First Available: April 11, 2022


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Jun 6

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • It works
Style: Corrector
I'm providing a 5 star review simply because it does what it says. Now as with anything with the celestron name attached to it you're going to pay for it. Which I do not like. I like their products most everything i have is celestron. They are quality. I just have a hard time believing that there is that much value in manufacturing or R&D to justify the cost the apply to customers. I wish it was a bit more reasonable. ... show more
Reviewed in the United States on April 22, 2023 by Richard H.

  • Great quality always buy name brand!
Style: Corrector
Great quality and a MUST HAVE for deep sky astrophotography! Don't go with an off brand because they aren't the same as this!
Reviewed in the United States on July 10, 2023 by Josh Josh

  • Pricey but works well
Style: Corrector
As expected
Reviewed in the United States on July 18, 2023 by George

  • Solid Construction, As Advertised Optical Performance.
Style: Corrector
My main motivation for buying this was to fit the sun (and moon) into the field of view of my APS-C (24 x 16 mm) camera sensor using my Celestron 8" SCT (2000 mm FL). Using a full frame sensor is not an option since the C8 will vignette. This device also allows a slightly wider field of view and lower f-number for deep space object astrophotography. Handy reference numbers for those wishing to photograph the Eclipse or just the entire moon: Max focal length when using an APS-C camera is about 1260 mm. When using a full frame, about 1900. But only if you can center the target and keep it centered. (To photograph the moment of eclipse use 400mm APS-C/600mm Full Frame and no solar filter.) This device is not useful for solar system astronomy, except the sun or moon, or when using eyepiece projection photography. But you can always just take it off. One huge advantage of this device is that you get just about the same performance as you would with an Edge HD telescope, and the field flattener costs half as much. If you buy an Edge HD 8" OTA you get a built-in field flattener, but still have the longer focal length, and hence smaller field of view and slower f-number. To see the whole sun or moon, or a more of the Pleiades in a camera, you would have to buy another focal length reducer, about $300 bucks. Since the Edge HD comes at a $400 buck premium over the SCT you spend an additional $700 bucks to get to the same optical setup you get with the the SCT plus this item at about $150 bucks. Go with this plus the SCT and save $550 bucks, and you will even have less glass between you and the stars to boot. The construction is very solid, you should have no problem hanging a DSLR (or better a mirrorless camera) off of this thing. ... show more
Reviewed in the United States on April 30, 2017 by Railbird

  • Truly awesome
Style: Corrector
It is not a hype. As Celestron states, this focal reducer is like having two telescopes instead of one. It improves a lot the way you can observe deep sky objects. It is a great addition to my 8” SCT Evolution.
Reviewed in the United States on April 17, 2023 by Marcos Szydlo

  • Seems to be used (lenses very dirty!)
Style: Corrector
This lens looked used and as if it had had some kind of liquid spilled on it that left a sticky residue. Was VERY difficult to clean even after several tries. I think I'll stick with ordering Celestron supplies straight from Celestron in the future.
Reviewed in the United States on May 30, 2023 by A. Newton

  • It’s what I ordered
Style: Corrector
The thing that I ordered is what arrived. So that’s a good thing right? It wasn’t damaged and works as expected.
Reviewed in the United States on May 2, 2023 by Douglas Holder

  • Great to see the whole object like the Moon or the Sun and not just a piece of it.
Style: Corrector
I purchased this focal reducer a couple of months ago but had not had the chance to use it until this past Sunday May 15th 2022 when I went to the University of Arizona and setup my scope with others who were there. I was using my Celestron Nexstar 8se and Star Sense to get it aligned with and a 40mm eye piece. I had noticed others were using their phones to get pictures and getting some decent ones at that so I thought I would give it a try and the pics aren't bad even if I do say so myself. I can see I'm going to be using this reducer a lot especially with the 8Se. My next step is to try and get images of the Sun as soon as I am able to. ... show more
Reviewed in the United States on May 18, 2022 by Howard W. Hudson Howard W. Hudson

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