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Old 20-03-2010, 02:13 PM
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Ritchie-l (Ritchie)
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Join Date: Jan 2010
Location: Craigieburn, Vic
Posts: 40
Quote:
Originally Posted by tonybarry View Post
This most likely indicates you don't have enough inward focus travel. Objects which are close create a focal plane further away from the mirror; objects at infinity move the focal zone closer to the mirror. The difference might only be a few mm. You might be able to squeeze a few drops of inward travel by remodelling the focuser; but sadly most people appear to need to move the primary mirror up the tube a cm or two.

SCT telescopes do not have this issue; they have sufficient travel for almost anything.

Regards,
Tony Barry
thanks Tony,
I Thought that last night, but it still knags me that in daylight it still focus's well.
I did remove the adapters and held by hand but, still no luck.
i did read where focal reducer could work but i am not confident with that either.
Ritchie
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