Quote:
Originally Posted by Stonius
Thanks, JA,
It's an interesting idea, and I do have a 2" focuser, though I think the 2 inch part of the first adapter would have to be on the *outside in order to mesh with the threads of my focuser.
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Hi Markus,
The way I was thinking of it (and it depends on your focuser) is that most 2inch focusers, even if they have some threads, will almost always have a PLAIN/Smooth 2 inch bore in order to accommodate 2inch eyepieces, often held in place by a thumbscrew or two or sometimes a collet type clamp. Anyway you simply slide the 2inch adapter (The 1st adapter above -holding the 2inch filter in the M48x0.75 internal thread) into the focuser and lock it in place with the thumbscrews. That leaves an m42 x0.75 male thread sticking out at you. To this simply screw on the 2nd adapter (M42x0.75 Female to 1.25inch) adapter and you have a system which can support 1.25 accessories/eyepieces etc. Hopefully things haven't been moved that far away that you can still achieve focus. That you would need to test before hand by knowing the lengths of the adapters involved are where things come to focus.
You can also leverage that M42x0.75 male thread for imaging as many cameras support that thread in either male or female form, so perhaps an adapter would be required. It depends on what cameras you have or intend to use, anything with APSc sized sensors or below would be fine, but full frame would vignette and push you to look at larger thread sizes.
Best
JA