

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.
Desertcart purchases this item on your behalf and handles shipping, customs, and support to Croatia.
🌠 Unlock the universe’s secrets with 37% more speed and clarity!
The Celestron Focal Reducer & Field Corrector is a precision accessory designed for Schmidt-Cassegrain telescopes that reduces focal length and f/ratio by 37%, converting an f/10 system to f/6.3. This results in a wider field of view and shorter exposure times, ideal for deep-sky observing and astrophotography. Fully multi-coated for maximum light transmission and housed in durable machined aluminum, it supports all standard SCT accessories and comes with a 2-year warranty and US-based expert support.

| ASIN | B00009XVHZ |
| Best Sellers Rank | #7 in Telescope Reflectors #70 in Telescope & Microscope Accessories |
| Brand | Celestron |
| Built-In Media | Reducer - Corrector |
| Coating | Fully Multi-Coated |
| Compatible Devices | Celestron Schmidt-Cassegrain telescopes (C5, C6, C8, C9.25, C11, C14) |
| Customer Reviews | 4.6 out of 5 stars 702 Reviews |
| Exit Pupil Diameter | 31.75 Millimeters |
| Eye Piece Lens Description | Plossl |
| Field Of View | 0.04 Degrees |
| Finderscope | Reflex |
| Focal Length Description | The original focal length of the telescope, before using the reducer corrector, is not explicitly mentioned in the provided information. However, it can be inferred that for an f/10 system, the reducer corrector reduces the focal length by 37% to make it an f/6.3 system. Thus, if the focal length of the f/10 system is F, then the focal length after using the reducer corrector would be 0.63F (f/6.3… |
| Focus Type | Manual Focus |
| Global Trade Identification Number | 00050234941754 |
| Item Dimensions D x W x H | 2"D x 2"W x 2"H |
| Item Height | 2 inches |
| Item Weight | 150 Grams |
| Manufacturer | Celestron |
| Mount | Equatorial Mount |
| Objective Lens Diameter | 200 Millimeters |
| Optical Tube Length | 105 Millimeters |
| Optical-Tube Length | 105 Millimeters |
| Product Dimensions | 2"D x 2"W x 2"H |
| Telescope Mount Description | Equatorial Mount |
| UPC | 050234941754 |
| Warranty Description | 2-YEAR WARRANTY |
| Zoom Ratio | 7 |
N**N
Visual or Video -A Great Accessory
I am sorry that I did not buy this accessory two years ago. It all began with a used Celestron C5. Then I bought a very nice used Nexstar 8SE and thought wow, I should have done this go-to thing sooner. After a year or so, I moved up to a new Celestron CPC925 and decided to explore video astronomy with an inexpensive Samsung SBC-2000 security cam. Most SCTs have a focal ratio of about f/10 (focal length divided by aperture) but a camera works better with a faster (shorter focal length) scope. The usual way to do that with a video camera is to screw on a small .5x reducer. So I bought on of those for $35 and was just amazed at the detail and colors in the Dumbbell Nebula. Then someone over at Cloudynights.com suggested that try adding a f/6.3 reducer (stacking reducers). So I bought the f/6.3, screwed in on the back of the CPC925, replaced the visual back and diagonal, mounted the camera (without the .5x) and stayed up until 2AM looking at the Orion Nebula. Before heading for bed, I pulled the camera, put in a 20MM 68 degree APOV eyepiece, and had another "Wow!" moment. The Celestron f/6.3 reducer-corrector really brightens the image, widens the field of view, improves contrast and detail, and flattens the image improving the look of stars near the edge of the field of view. Many people leave them on all of the time except when looking at the moon and planets or other high magnification situation. There are other and cheaper reducers on the market and they do work. However not all of them offer the same degree of improvement at the edge of the field of view. Rod Mollise writes "...6.3 r/cs are one of the best--if not the best--SCT accessories to ever come down the pike" and "I'll put it this way...the 6.3 rarely comes off the rear cell of the C8."
C**K
An essential accessory for deep sky viewing or photogrqphy with a Celestron SCT
The focal reducer is easy to screw on and of, and it fits snugly onto my Celestron 8SE. It provides a crisp, clear wider field of view, allowing me to see or photograph a larger area of the sky. It feels sturdy and well-built, with knurled rubber for ease of grip. It is a good value for the money, and recommend it for anyone getting started with a Celestron SCT.
M**N
Buy this, you need it.
A brilliant solution to a problem I didn't know I had. I have been doing a lot of astrophotography with my celestron scope. This is a tremendous help. Before, when trying to get a photo of the entire moon, I was taking maybe 22 photos and stitching them together on the PC for one combined picture. It took a long time to photograph and to stitch. With the reducer, the field of view is wider (but less magnification) and it took just 6 shots to get the entire moon, and I could possibly have done it in 4. With the Deep Sky Imager I am taking much superior shots of the Orion Nebula. It looks far superior with a much wider field of view and it also makes things brighter which eases the exposure problem. The product is easy to install. I can do it as the telescope continues to track. Unscrew the eye piece, screw on the reducer then screw the eyepiece into the reducer and you are ready for your wide angle shots. Summary: it is really improving my photography.
J**Y
Worked well, easy to install
I put this on my celestron 8se SC telescope with the goal of increasing the field of view (because I have a zwo asi224mc camera with a relatively small sensor area). It was easy to install and worked quite well. Before buying it, I was worried that the focal plane would shift so much that I would not be able to focus within the limits of my focusing knob. But that worry was unfounded and I got to focus easily. I could fit the Dumbbell nebula with enough contextual background in the field of view of my camera. As far as I could tell, I did not observe significant vignetting. My plan is to leave it in the back of the telescope forever and only take it off when doing planetary observation or imaging (which requires higher magnification).
R**T
Does the job, Be sure it's really what you want. Pricey.
A focal reducer is pretty much a must have for SCT owners due to the high focal ratios they use to keep the secondary mirror to a reasonable size. This one does what it says it does, just don't expect it to miraculously turn your C5 or C6(what I have) into a dark DSO hunter. After I ought this I discovered that there are reducers on the market that will drop to f/4 or even lower as needed for the large dim deep sky objects. It doesn't distort or diminish light noticeably so I still give it good marks, just know what you're getting..a bit of reduction from a great planetary scope to a more usable near and large object one. It didn't quite get the whole moon on screen with my little homeade logitech webcam at prime focus (about equivalent to an 8mm ep)
R**.
Great Product
Great product from Celestron and an imoirtant part of the image train on the Celestron 8SE AVX.
Y**R
Must have.
Excellent optics. Reduces exposure times. Quality manufacturing.
L**K
Valuable accessory for DSO viewing and photography
I read about such corrective lenses in a book on astrophotography. The goal of the lense is to effectively decrease the f value of your scope, increasing light gathering ability and the field of view. This lense accomplished both goals for my Celestron NexStar 6SE. It changed the scope from F10 to F6.3 and increased the FOV so that objects that formerly were too big to image "whole" now were imaged completely. The visual brightness of objects was increased and the resulting exposure times decreased. I keep this lense on the scope by default and only remove it (restoring the original F ratio) when intending to view and image planets or split close double stars. I have not noticed any distortion in the images when the lense is in place. I count this purchase as one of my best decisions when acquiring accessories.
Trustpilot
2 weeks ago
1 month ago