You can stack images if you want a cleaner result. https://sites.google.com/site/sequatorglobal/ is a good easy to use option. Can also do panoramas or both. Use something like stellarium to find something you want to photograph. clearoutside.com can help with weather and moon phases. Make sure to shoot when there isn't any moon light. https://www.lightpollutionmap.info/ can help finding dark locations. Photopills... Source: almost 3 years ago

If you are a windows user, you can also use the program sequator (https://sites.google.com/site/sequatorglobal/). It will line up the images for you, and you can then do post processing in photoshop to improve whatever you need to to get the colors and images right. You can also add in dark images to remove camera noise. Really sweet program for night photography. Source: almost 3 years ago

It's 30 x 15s exposures at 1600 ISO, all stacked in Sequator, which is free software that tracks stars and allows you to accurately stack images despite the stars moving. There was a little editing afterwards, but nothing major, the stacking does most of the work. Source: about 3 years ago

I recommend you test your star tracker mount to see how good/bad is the periodic error, etc. One example of how to test: Https://philhart.com/content/star-adventurer-review#:~:text=Performance,minute%20period%20of%20the%20worm. Then you can do some math: if my tracker error is X arcseconds, and my camera pixel size is Y microns...I can use a lens of Z focal length and only have star trailing of W pixels. (And... Source: about 3 years ago

What you can also do, is take many pictures and stack them using a free software like Deep Sky Stacker or the simpler and also free sequator . By doing that, this will reduce the noise of the higher ISO and will help you edit your photos better. Source: about 3 years ago

So, according to deep sky stacker darks and bias frames remove different kinds of noise. It says nothing of them working against each other. Source: over 3 years ago