Measuring field curvature

[jwoody (Jeremy)]

Hello all
What software to people use to measure field curvature of an image?
I am tweaking the primary mirror on my RC10 and want to the focal length just right.
Thank you
Jeremy

[multiweb (Marc)]

Originally Posted by jwoody

Hello all
What software to people use to measure field curvature of an image?
I am tweaking the primary mirror on my RC10 and want to the focal length just right.
Thank you
Jeremy

CCD inspector by taking a shot of a uniform star field devoid of nebulosity.

[jwoody (Jeremy)]

Thank you Marc