When I use SGP’s auto focus I never seem to get below 1.9 - 1.8 HFR, but a friend of mine gets down to about 0.5.
Also her V curve is far better than mine.
I was wondering what effects the lowest HFR one can expect?
Clearly I assume seeing conditions has an effect (but my results were consistent over several nights).
What else effects the result?
Is it dependent upon camera pixel size?
Is it dependent upon scope aperture or focal length?
Mount: AZ EQ6-GT on a fixed pier.
Scope: Vixen AX103S.
Camera: Canon 5D Mk2.
Focuser: Lakeside Motorised Focuser.