For what it¡¯s worth I use the SharpCap polar alignment tool with an imaging camera and telescope combo that results in 0.89 arcsec/pixel and a FOV of 1.15?x0.9?. ? This ?combination always works. ?Any wider FOV¡¯s should work, all the way up to a camera on a guide scope.
A while back I had a little trouble with a longer FL scope (more like 0.7 arcsec/pixel, same camera) but SharpCap must have updated their plate solving database as this combination now works in the latest versions.
As with any platesolving, you have to be in rough focus. ?But sharp focus isn¡¯t necessary (but certainly donuts won¡¯t work on an SCT). ?I can usually get platesolving to work even when my HFR is as bad as 3x the value at sharp focus.
