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Old Wednesday 23rd January 2019, 15:19   #63
henry link
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Join Date: Feb 2004
Location: north carolina
Posts: 4,386
Originally Posted by james holdsworth View Post
I've often wondered about conflicting CA reports. Yes, I'm aware of how individual this is, but is there an aspect of binocular construction [or mis-construction / poor QA] that could cause higher than typical [for that model] CA?

Internal alignment etc?
Yes, internal misalignment leading to coma will cause lateral color to be asymmetrical with the null point falling somewhere off-axis, which can cause significant color to appear on axis. That's not the case with this particular 10x32 which in a high magnification star test shows no significant coma in either side.

Last edited by henry link : Wednesday 23rd January 2019 at 15:28.
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