Celestron .7X Reducer for EdgeHD 1100

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Celestron .7X Reducer for EdgeHD 1100
$599.95
Item # CE-94241
  • The Celestron Reducer Lens .7x - EdgeHD 1100 makes your EdgeHD 1100 one full f-stop faster than f/10, reducing your exposure time by one-half to capture the same brightness of object.
  • Maintains a similar flat-field performance as native Edge HD optical design.
  • Increases FOV by 43% to better capture wide field images.
  • The Celestron Reducer Lens .7x - EdgeHD 1100 threads directly onto the 3.25" threads of the EdgeHD which reduces mechanical vignetting and allows for use with larger (full frame) sensors and Off-Axis Guiders.
  • Maintains the identical back focus when used at F/10 and provides generous back focus to accommodate additional accessories and wide variety of cameras.
Description

Details

Celestron .7x Reducer for EdgeHD 1100


The Celestron .7x Reducer Lens makes your EdgeHD 1100 one full f-stop faster than f/10, reducing your exposure time by one-half to capture the same object brightness. It maintains a similar flat-field performance as the native EdgeHD optical design, while increasing the FOV by 43% to better capture wide field images. Threads directly onto the 3.25" threads of the EdgeHD to reduce mechanical vignetting and allow for use with larger (full frame) sensors and Off-Axis Guiders. Keeps the identical back focus when used at f/10 and provides generous back focus to accommodate additional accessories and a wide variety of cameras. Features 5-element lens design.

Additional Information

Additional Information

SKU CE-94241
UPC Code 050234942416
Manufacturer Celestron
Barrel Size Thread-on
Warranty 2 Year Warranty
Reviews

Customer Reviews 2 item(s)

Very well put together
The reducer is very well put together with screw on lens covers on both ends. Very pleased with the quality and performance. I would highly recommend.
1= Houston, We Have a Problem & 5= It's Out of This World
Review by toole79 / (Posted on 10/22/2014)
C-11 EdgeHD Reducer
Well Finally after years of waiting, the Celestron C-11 EdgeHD .7x focal reducer is being shipped. I have mine installed and have started testing.
I am using this with a MOAG/SSAG/Micro-Touch Focuser and an SBIG ST-8300M camera.
As indicated by Celestron the new reducer back-focus does remain the same at 146mm however there is a significant mirror shift required to reach focus.
My typical seeing at F-10 yields 7-8 HFD star diameters and with the reducer at F-7 it yields 5-6 HFD diameters (about what one would expect. Images of M-13 at F-10 or F-7 have yielded very round stars with no visible chromatic aberration and very little light fall-off. This is on the 8300 chip size. I plan on further tests using my full frame DSLR in the near future.
The generous 146mm back-focus being identical for both F-10 and F-7 make this very easy to switch in and out of the optical train even in the dark.

The only small disappointment I have is with the rather loose fit of the thread interfaces especially in this modern day of NC machining capabilities. These tolerances should be held much tighter. Other than this the optics and mechanical finish are excellent.
1= Houston, We Have a Problem & 5= It's Out of This World
Review by Steve / (Posted on 6/10/2012)
Included Items

Included Items

  • Celestron Reducer Lens .7x - EdgeHD 1100
Questions & Answers

Product Questions

Hello! Does this reducer work with Celestron CGEM 1100? Or it's needed only HD optics, isn't it?
11
Hello,

I want to attach a Starlight Xpress SXVR-M25c camera to the C-11 (1100) Edge HD 0.7x Focal Reducer.

The Starlight Xpress SXVR-M25c has female T-threads and a back focus of 17.5mm.

According to the reducer info, the optimal distance between the reducer and the camera sensor is 146mm. Where can I get an adapter to provide this spacing?

Thanks.
9
Does this work well for visual use too?  Even with wide field (Ethos 100) eyepieces?
-10
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