Hi Duka,
I've only had a chance to look at the app with a Nikon kit lens (and then my battery died after 10 mins), and at first glance;
Non astro-specific suggestions;
- During live view (especially when zoomed in);
- allow cursor-keys to pan the view
- re-calibrate the 'click' function so it centers relative to zoomed in image, as opposed to relative to the non-zoomed image.
- introduce 'frozen image transparency overlay' - so that you can see and control an overlaid image from a previous shot on your current exposure (very useful during stop-motion animation).
- Alternative reticles / grids - such as cross hairs and circles
- ability to rotate and pan the reticles
- Shutter speed to 'Bulb' (so a remote release cable can be used)
- further camera settings review & control, with priority to;
- Exposure delay mode
- Long exp NR
- High IS NR
- clean image sensor
- attach comment, and have comments applied to images.
Astro-specific suggestions;
- ability to manually enter f, D and F data
- ability to 'mark points' in LV image, and calculate / display angular distance between marks.
- ability to set / un-set exposure delay mode.
- ability to chart the 'brighness' of a section or line through mart of the LV image.