13-07-2020, 03:44 PM
|
 |
Registered User
|
|
Join Date: Mar 2015
Location: Melbourne
Posts: 1,508
|
|
Quote:
Originally Posted by Merlin66
Markus,
Basically a simplistic way of analysing your image when using the reducer.
If the star images in the corners look like comets - flaring away from the centre then the spacing of the reducer to CCD is too close and should be increased. It doesn't give a quantifiable outcome, just a basis for some trial and error.
It doesn't replace some of the commercial programs available to measure and quantify field curvature. (e.g. CCDInspector etc.)
|
Ah, thanks! :-)
M
|