I don’t know if something changed with SGP focusing or if I have something set differently but focusing my SCT has been working well:
However, if I am a little off to start with I can get a curve like this:
What it did was then to extend the focus run and keep going inwards. I finally stopped it and told the focuser to go to the lowest point.
Is is possible to have the focus algorithm ignore the flat tails at the top of the graph? It’s otherwise a good focus curve but the tails throw off the slope and the intersection of the lines which I think caused it to keep going.