Just after some pointers from anyone using a similar set up.
I use a modded (and cooled) dslr and want to use NB filters with autofocus and wondered what a good starting point would be for exposure length. I have initially set 25seconds at max ISO (6400 in my case) but wondered if this would be sufficient given the reduced sensitivity of the CFA.
Trial and error would no doubt sort this out but wondered if anyone had tried this and could confirm a suitable base point.
The other option I suppose is to focus unfiltered and then use a Baht mask to focus with the NB filter to work out the offsets and use the Auto Adjust Focus per Filter?? but im not sure how that works…need to read the manual again I think