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Originally Posted by matt
1: The single screw brass compression ring which secure the eyepieces.
But when I tighten it, it pushed the eyepiece or my collimation tools in the opposite direction, and you get a different result (through a Cheshire or laser) every time you tighten the ring depending on how tight you turn the screw. This offers little to no consistency and leaves the process open to image quality suffering through poor alignment.
Also, given such vaguaries in this area of the focuser's design, how can you ever be sure you've actually achieved a genuine collimation?
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Whinge away, we don't mind.
Yep it's a downfall all right. I shimmed underneath the compression ring with a strip of plastic to take up the slack so the eps are a snug fit without using the screw to tighten....2 eps are very snug... but the sideways shift is gone.
Can't help with the extension though, that's a real problem without buying a new one or making an extension to fit under the baseplate.