Sctom ASIAIR Studios for Mac?
That would be ASIStudio suite on macOS. ASIAIR is a different product completely.
For tinkering around, I recommend using the ASICAP program in the ASIStudio suite. That should allow you to easily play with focus in the daytime.
Daytime exposure will need to be very short -- no more than 1 millisecond (0.001 sec), and the camera gain needs to be low (start at zero). Look at the histogram, and if the curve extends beyond the right side of the histogram, reduce the exposure time even more. Adjust the exposure so that the curves fall before they reach the right hand limit.
In real estate, the mantra is "location, location, location." In astrophotography, it is "focus, focus, focus."
For night time, you will need exposure times of more than 1 second to see an appreciably number of stars (that said, I have seen Vega with just a 0.01 second exposure before the Sun has even set -- but Vega is a very bright star; for that matter, I have seen Venus at high noon with unaided eyes, but that was in my youth, when my eyes were better :-).
To see a hint of even a bright nebula with your camera, like the North America nebula, you would already need exposure times of over 60 seconds and gain of 100.
Plus, the focus would have shifted because you are focused at infinity instead of just "far away" at a tree in the backyard. The drawtube would need to be shortened by 0.5mm to 2mm at night to achieve infinity focus after you have achieved daytime focus.
If you don't already have a Bahtinov mask that fits your telescope, I highly recommend getting one to help you focus on the stars.
Chen
