My 10" RC has a habit of losing focus very quickly at the beginning of the session.
I guess it is caused by a quick cooldown by the fans.
One way to solve this would be to set up "Refocus every" at a very short interval, but the problem is that once the telescope is thermally stable, refocusing would be taking time without good reason.
So suggestion is to have progressive "Refocus every", where the following parameters can be setup:
1. Initial duration - how long to wait till 1st refocus (default 10 min)
2. Progressive factor - a multiplying factor, which will be used for calculating next refocus period (default x2)
3. Maximum duration - no longer increase duration, after this value reached (default 120 min)

Alex

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