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Old 22-10-2019, 12:13 PM
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bojan
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Join Date: Jul 2006
Location: Mt Waverley, VIC
Posts: 6,932
As was obvious on the test image I attached earlier in this thread, my combination has a problem with working distance.
This was partly because of very confusing and non-standardised terminology used by amateurs and equipment suppliers, partly because I was using adapter combination similar (or same) to this one.
The required (maybe?) working distance for Meade series 4000 0.63x focal reducer is ~61mm (for Canon camera), and the one I have has ~68mm total length.

I could not find the variable adapter neither low profile T2-EOS adapter (they are all ~11mm thick), so it occured to me it should be possible to modify one of my existing low profile M42-EOS adapters, by replacing the yellow part with T2 insert from thick adapter.
I need to machine the black insert to mach the yellow insert dimensions.
Will post the result of this operation when I am done.


EDIT:
Another possibility is this adapter... It is not as thin but it may be worth trying.

Last edited by bojan; 22-10-2019 at 03:48 PM.
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