What exposure length do you set PHD2 to?

[Viktiste]

As the title says; What exposure length do you typically set PHD2 to? I would think that is the most important parameter, as it dictates how frequently corrections are sent to the mount. I typically use 3 seconds but have no reason why...

[michael8554]

If you run the Guide Assistant in PHD2 it will advise the exposure and Minimum Move settings for the quality of "Seeing" at your location.

"Seeing" is a measure of how turbulent the atmosphere is (that's what makes stars twinkle).

When Seeing is poor the guidestar image will be bouncing around.

Setting a fast exposure like 1 second would have the mount "Chasing the Seeing", so a slower exposure like 2 or 3 seconds will give smoother guiding.

If Seeing is good then a faster exposure might be advised, it can help the guiding of a budget mount.

Michael

[bruno]

A Good Watch is Dylan o donnell on you tube it may answer your question? I have mine set at 2 secs FYI