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Post by Deleted on Feb 14, 2014 14:20:08 GMT
Hey guys, After reading this very good guide on reducers By Jack Huerkamp www.waningmoonii.com/Files/Focal%20Reduction%20for%20Dummies.pdfI went and bought the adapter needed to use the 3.3 reducer AFTER the diagonal. As i use a fork mounted SCT i cant use it before the diagonal cause it crashes into the base when pointing high in the sky. So i have never really been able to test it out much. Yesterday i done a few tests using a TV ariel. First one...Normal configuration. i.e. 2" diagonal then just add the camera with the 0.5 reducer. So my f/10 scope is now f/5 apparently. Next one... Inserted new adapter with 3.3 reducer and SCT visual back into the 2" diagonal. Removed the 0.5 reducer. Then slotted camera into the visual back. (Notice not much change its actually closer if anything lol) Next one... I then removed the lens from a barlow and slotted the camera into the barlow then slotted it into the visual back. The barlow gives me roughly 20-24mm extension. Bringing me to around the 60mm mark from ccd chip to reducer lens. (ive since removed the barlow and now using a real 2" SCT extension. Should work the same not tried it yet but its more pleasing on the eye ) So now it looks more like f/3.3 and gives a much bigger FOV than the 0.5 reducer. Will post pics of a real target if i ever get the chance
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Post by Deleted on Feb 14, 2014 14:44:31 GMT
Nice, I also use a 3.3 reducer on my VRC6 and it works great.
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Post by Deleted on Feb 15, 2014 12:05:30 GMT
Thanks, Chris! This has helped me a "ton" with figuring out focal reducers. Jack's paper is most helpful, as well.
Cheers...Bob
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Post by Deleted on Feb 15, 2014 12:49:20 GMT
Glad it could be of use Heres how it looks. And one with it in the diagonal
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