Dear ZWO/Seestar devs
After using the S30 Pro for a few nights, I came with the following suggestions:
Overall I find the app nice but quite confusing. I would honestly rather have something more similar to what you achieved with the ASIAIR which is almost spot on and quite more intuitive (besides, I think having a consistent experience accross devices would be awesome). Having the polar alignment routine in my profile for instance is not intuitive at all, or having the exposure controls hidden in the 3 dots on the top right.
The frame rejection algorithm is a bit erratic. With 20s shots in equatorial, sometimes it discards only 10% of the frames or so. But other times, or in other fields, that number ramps up to 50% or even to >90% frames rejected. While polar alignment errors, or light wind ruining the tracking cannot be ruled out, my feeling is that the system would profit immensely from having a customizable frame rejection. Maybe add some parameter to control how many frames are rejected. Call it star quality if you want to merge several indicators (like roundness, HFR, etc) or directly exposing the maximum HFR and roundness values for instance.
The stacked frames by default, at least with the LP filter, have a marked green tint. That can be solved in post processing, but probably it would be great to have some sort of simplified color calibration integrated. You can have a look probably at how SPCC-like algorithms are implemented in Pix Insight, Siril, etc and knowing the sensor and bandpasses, and having available Gaia catalogs, perform the color calibration on demand.
There is some dark ringing in bright stars after stacking many frames. This is, to my experience, a hit and miss, but definitely it is there in some shots I took yesterday around the Markarian chain (without LP filter). You may need to check that out.
