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Reducer for a short focus (420mm) APO?


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Recently, I bought a 2" Astrophysics 0.67 Reducer for another scope which got sent back. I kept the 0.67 reducer for sometime in the future. While waiting for the future I was playing with my TS65EQ 420mm f6.5 scope as ya do! I placed the reducer on the front of the ATIK 3 nosepiece and slid it into the scope then wondered if I could find focus. Well, blow me down, I did :) And I was impressed I could now fit objects in the FOV that would have needed a mosaic before.

On closer inspection, I noticed the corners of the image were not that great compared to the perfect flat image of the TS65EQ without any additional optics. 

The TS65EQ already has a field flattener built in. 

My question is, are there any focal reducers out there for such a short focal length scope? The ones I can find are for SCT's not APO's.

Unprocessed Trunk.

 

Trunk wide field.JPG

Corner edge

Trunk corners distroted.JPG

 

Trunk from basic TS65EQ no crop.

 

IC 1396 Elephants Trunk HOO.jpg

Edited by Star101
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