Hi. I have used SN PP8 successfully for years in order to estimate the FOV on my chip when imaging a target. I image with a Celestron 9.25 Edge with 0.7FR and QSI 640. Lately I've noticed that the FOV indicator is not accurate. When using the FOV indicator for the above setup, the resultant FOV/image on my chip is considerably smaller, ie: approximately the FOV in Starry nights when using the above setup without the focal reducer. What might have caused this change / inaccuracy, and how can I fix it? Thanks
Derek