This is my setup:
1. Sony a7r3
2. 16-35 GM
3. Sky Guider Pro
I am planning to shoot mostly landscape astrophotography, i.e. Landscape Photography with the Andromeda Galaxy. Please note that I am fully aware that I will be using multiple shots to compose my image (one for the foreground and possibly a few for the sky)
Since I am using an auto-glider (Sky Guider Pro), I don't feel the 500 rule applies to me.
1. What ISO should I shoot in? (According to this graph https://blog.kasson....s-ss-uc-edr.png, I should be choosing 100 or 640 only)
2. Should I stack or should I expose longer?
3. What is the recommended aperture? (I am seeing sharp images with f/8)