I got into guiding and did very well with a typical quide scope/cam combo, with wider field main imaging scope and ASI1600 -type images, stacked, sharp, etc. I recently moved up to 1000mm main scope, and noticed that I get noticeable image drift in one direction over an hour or so, even WITH guiding, and the guide star stays in the middle the whole time, and I also get a decent PHD2 graph around and under one arc-sec. RMS... Anything thoughts on how the overall tracking over an hour or more, WITH guiding, can lead to a one-drectional drift over an hour? My subs still have basically round stars, on most frames... My mount is a Celestron AVX.. Time to upgrade to an EQ6-R Pro? Specifically, I guess, why is my guide star still showing in the middle of the Star Profile screen in PHD2, while my main cam image subs are drifting in one direction over time, perhaps several arc seconds per minute...? Thanks!
Edited by stacaz, 09 April 2020 - 11:59 PM.