Quote:
Originally Posted by allan gould
The trouble with the focuser is when the adapter holding the camera is tightened up there is some movement so that the camera film plane is NOT at right angles to the scope axis and so you get different focus across the film/CCD plane. Also if you use the lock knob to fix the focus it shifts slightly and you loose best focus.
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Thanks Allan,
Those issues are familiar to me. Both come down to the design and assembly/setup of the focuser. I've carried out some simple mods which mostly fix the issues, perhaps I should put together an article in 'Equipment Discussions' or 'ATM projects' to explain what I've done.
Cheers,
Rob