How to determine best exposure and ISO

[kornkobgrunt]

I have a film camera and I want to take prime focus shots of deepsky objects. How would I determine the best camera settings prior to taking a shot? I don't like to waste film and don't get to see what results my shots wielded until later after paying to develop them. Am I going to have to guess and check?

[michael8554]

Hi

Colour or Monochrome?

Slide or Negative?

There may still be info on the web about max exposures before your choice of film starts to overexpose.

ISO will be like a dslr - higher ASA more grainy, but shorter exposures.

Is your mount good enough for long exposures without star trailing?

Michael 

[celestron8g8]