When I do my autofocus routine, I have a recorded KFR of 0.66. This is done on one star only. Yet when the HFR is calculated on a captured image it is reported as 1.99 in the Analyse tab. Why the difference?
While theoretically, HFR should be identical over the whole frame, seeing makes this value slightly different for each star. The HFR recorded for the frame is the mean HFR value of detected sources in a 10-90% rectangle, leaving out saturated stars and outliers greater than 2 sigma.
HEQ5-Pro - Atik 314E - Orion ED80T - DMK21 on Orion 50mm
DIY 3D-printed Moonlite and FWheel RGB/LPR
KStars and indiserver on two Atom 1.6GHz 1GB RAM Linux, VPN remote access