Autofocus settings

Sequence Generator
1

I have a quick question regarding the autofocus settings. I’ve noticed a line in the log file relating to the HFR determination “Calculating HFR with sample size:2” Does this mean it is only using two stars to calculate the HFR? I’ve got my min star size set at 2px. I’m wondering if I need to set this to a different value?

Thanks,

Peter

2

Anyone know the answer to this question?

3

I can’t say for sure but I would guess that the “2” is your star sample size, not the number of stars used for determining HFR. In any event I think 2 is perhaps a small number for the HFR sample size, but maybe that works well for you.

4

Thanks for the response Joel. What do you mean by “star sample size”? The way I understand the min star size setting is you want to have it large enough to reject hot pixels but small enough to ensure sufficient stars are included in the HFR calculation. The log says it found 146 stars, I’m wondering i it is using all 146 of them in the HFR calc in which case I could afford to increase the min star size setting. The wording in the log “Calculating HFR with sample size 2” sounds like it is only using two of the 146 stars it found.

Peter