Focus offsets

[mark skelton]

I'm looking at 2 different imaging software (APT & N.I.N.A), On both you have the option to set the filter offset (focus). I'm using the beader 1.25" filters on my  set up. Does anyone use these  know how par focal they are and how much offset is needed on each filter?

[Dr_Ju_ju]

If you use the auto-focus routines, thay both software packages have, you should be able to re-focus on any filter change, plus periodic changes due to temperature variations etc.

[mark skelton]

12 minutes ago, Dr_Ju_ju said:

If you use the auto-focus routines, thay both software packages have, you should be able to re-focus on any filter change, plus periodic changes due to temperature variations etc.

Cheers I'll look into that