David,
Interestingly we recently identified an issue with the length of the eyepiece holder tube on the PST black box.....
Some were shorter than others!!
The short one allowed DMK's etc to come to focus, but the longer one didn't!
Don't ask me why Coronado changed it!
(I'll find the reference and post actual measurements)
EDIT:
The holders are either 63mm high or 58mm high.
The 63mm seems to have an eyepiece "recess" of 35mm, and the shorter 58mm is only 30mm deep.
A short nosepiece (no shoulder) seems to work on the 58/30 but not on the 63/35.
Last edited by Merlin66; 14-11-2013 at 01:20 PM.
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