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Strange scope-reducer question

Askar 65PHQ Reducer Acquisition Deep Sky
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Sean Mc avatar
Sean Mc avatar
Heya!  

I’ve got an edge hd 800 with the matching 0.7x reducer.  I also have an askar 65phq. 

Here’s my (probably crazy) thought process…

The edge to is supposed to be a flat well corrected field before you add the reducer, and the 65phq is supposed to be the same without a reducer.  Would the edge 0.7x potentially work on the 65phq?  

I mean, if it did, that’s another FOV combination without spending money!
Engaging
Tony Gondola avatar
Tony Gondola avatar
Probably not, that reducer is designed specifically for the Edge HD. It's doing more than focal reduction. You could certainly try it on your 65phq but I wouldn't expect it to work very well.
Well Written Concise
Sean Mc avatar
Sean Mc avatar
Hmm.  It might just be a case of needing an adjustable extension tube.
Christian Großmann avatar
Christian Großmann avatar
Another problem might be the thread. Celestron uses a different thread (imperial?) than all other scopes I have. So at least an adapter is needed to screw it on.
Sean Mc avatar
Sean Mc avatar
Yeah i looked it up. It’s an SCT thread. I’d need an m54 to SCT.
Harry Karamitsos avatar
Harry Karamitsos avatar
I think that it might work as both scopes give a flat field prior to the reducer. Seems that the reducer has no need to further flatten the field it may be the same. 
I do agree, though, it’s best to try them and see if it actually works.
Dale Penkala avatar
Dale Penkala avatar
There is no way that reducer will work on a refractor, the optics on an SCT involving a mirror are totally different from the glass in a refracting lens assembly, and the reducer will work totally differently too, but try it by all means, but if it helps, about 10 years go I put a Meade reducer on a refractor, knowing it would not work but just to see what effect it had, and well suffice to say it totally trashed the view…👍🏻

I agree here 100%. 2 different optical designs. Sorry to say but I wouldn’t waist my time even trying.

Just my 2 cents worth.
Harry Karamitsos avatar
Harry Karamitsos avatar
Let us know what you find when you try!
Oscar avatar
Oscar avatar
I remember one guy put a coma corrector on his SCT and it somehow became F/2 (I think he machined a part that allowed him to connect the CC to the front-end, like a Hyperstar), and the resulting images were actually more decent than I would've expected

try it, and tell us what happens
Sean Mc avatar
Sean Mc avatar
I don’t think it would be perfect, but I think it could work with a m4/3 sensor. 

Edit: I’m not going to try because I don’t have the SCT thread adapters smile