Quote:
Originally Posted by kosh
Allan, I think you are right. I have a small spacer in between the corrector and the DSLR to give me some extra back focus. I didn't realise that the distance between the corrector and the DSLR sensor had to be 55mm. How embarrassing 
I hope your suggestion works, it's an easy fix.
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Hi Kosh,
That's good but it's not that easy -
the distance of 55mm is recommended but will change by ± 1 mm
or maybe more - depending on your scope.
That allows the MPCC to correct for different f ratios.
You may need a set of spacers to try.
cheers
Allan