|Andromeda (M31) shot at ISO 3200, 6400, and 12800|
|Orion Nebula (M42) shot at ISO 3200, 6400, and 12800|
|The Pleiades (M45) shot at ISO 3200, 6400, and 12800|
As you can see the noise goes up a great deal between ISO 3200 and ISO 6400, but I think the jump in noise from ISO 6400 to ISO 12800 is a deal-breaker when it comes to using it for astrophotography. I think I'll try stacking some images to reduce noise in the 3200 and 6400 range.
Hopefully when I get my motorized EQ mount set up I won't have to resort to such high ISO to reveal faint deep sky objects, but this was a fun little experiment using fixed-tripod techniques I'm already familiar with!
|Canon EOS Rebel T5i|