So, some comments on the version 2.0 release, some are actually bugs carried over from the previous version as well.
For color cameras, using a filter like Ha (7nm in my case) presents several issues. The biggest one is focus/autofocus. It looks like the autofocusing routine as well as the focus detection expects to "see" stars in all three channels. I have stars that clearly show in the exposure, yet the hfd detector can't detect the star. This is evident in the autofocus routine, as the star profile only shows a pale blue blur. I don't know if it does some sort of internal normalization or what, but clearly this causes the autofocus to not only miss stars but to misfocus them as well due to Ha focus point not being the same as say the blue channel.
One fix for this, with the color cams, is to allow the use to select a channel to focus on. Hopefully per filter or plan item.
Another issue with autofocus is that with filters, stars are much dimmer. The only adjustment for that currently is exposure, but I end up with unrealistic exposures of like 20 seconds at the gain the camera is using, in order to see stars through an ha filter. A useful addition would be to allow the user to specify a gain setting for focus/autofocus as well. That way, during a session, the camera would automatically switch gain for focusing, then go back to the imaging gain for the regular exposures.
Another issue I see is also related to filters, in this case with flats and color cams that use filters. Again, the histogram seems to be completely off, especially when using the autoexposure mode. For Ha filters with color cameras (mine is the 2600mc) the resulting flat is overexposed in the red channel, yet the histogram shows a saturation occuring at a very low adu count (something like, most red pixels are at 1000). This has resulted in unusable flats. My only workaround is to take a flat, transfer the file to my laptop where I can view it in a proper fits viewer (astap for one) then figure out the new exposure and try again. Very tedious.
Maybe the duo or tri band filters do better in this respect, but I don't want to go that route. I am only intersted in adding Ha data to my images, not narrowband.
Hopefully these will be addressed soon. So far I have stopped taking Ha data with my camera due to these issues. I have wasted way too many clear nights with out of focus stars.
