Neat Video & Neat Image community

ok ... I try to do so!
thank you very much

I did not understand ...
the dark frames for astrofotograifa you are taking a picture with the same setting with the cap on the telescope
so you highlight only the noise
how do I take a picture with aperture of 90 seconds at a target?
I apologize for the time that I'm stealing

hanks for the quick response
just one more thing
in astrophotography use esopsizioni long type 90 seconds
how do I set the time to 90 seconds photographing the target?

good morning to all
First of all I apologize for my modest English
I am a new user and I wanted to know if any of you use it for astrophotography
in astrophotography to eliminate noise must subtract the dark
if I take a picture I can use it as a dark cone noise profile?