Mewlon star test discrepancy...???
Posted 05 May 2004 - 08:39 PM
Posted 05 May 2004 - 10:38 PM
If your rings are concentric, don't worry about it.
Posted 06 May 2004 - 05:58 AM
Posted 06 May 2004 - 10:03 AM
I've got a Mewlon 250 (couldn't spring for the 300 -- would have had to upgrade my mount as well...)
Mirror shift will cause collimation to change slightly as the optical axis tilts. At very high magnification (like, 400x) you'll probably see the (slight) effect when you re-center the star after shifting focus but again it wouldn't cause the dissimilar images on either side of focus.
How do you find the 180 compared to your C9.25?
Posted 09 May 2004 - 12:11 PM
Posted 10 May 2004 - 09:04 PM