Before my question, I’d also like to echo compliments to how well SGPro works. I was away for a bit over 3 weeks, and this last Saturday was my first night back. I upgraded to the latest SGPro and PHD2, created a new sequence for M101, and ran close to 8 hours successfully. Really nice software!
The only issue was a midstream problem with autofocus.
- Sequencing was in the following filter/event order: Ha (12), LUM (12), R (6), G (6), B (6).
- AF was at each filter change and after every 5 images.
- Temperature Compensation was at 113 steps per degree C.
LUM started around 11:24 pm (file 232444) and finished the last file (013831) around 1:49 am. From the start of LUM through 12:38 am (file 001227), focus was acceptable. Although file 001227 did suffer a DEC bump which made it unusable. But from files 001227 to the next (002318) there was an AF, and I believe a report of almost a 1 C temp drop. It looks like SGPro did what it was told to do, which was adjust the focus position by about 100 steps (from 29377 to 29473). However, this data appears to have been bogus and SGPro never recovered from the out of focus state through the remaining 7 images. The AF Packs 7 and 8 show the focus imbalance, where AF Pack 6 (focus going into LUM) shows acceptable.
File 013831 was the last (12th) of the LUM images and the 7th that was out of focus. File 014945 was the next file, and the first of the RED images. And it was back into acceptable focus.
With my setup, I expect to have to sacrifice a few images to DEC misbehavior, and maybe rarely to mis-focus. This session was unusual in that consecutive AF executions (AF Packs 7 and 8) failed to correct focus. Also interesting was the AF for the following filter (RED) had everything back where it should be.
Sorry for the long wind. Any thoughts on this?