He there, I am quite new to astrophotography and am using an Askar 71F with a harmonic mount and guiding.
How do I determine ow bright my light frames should be? If I have my ISO to high, they look almost white and with Iso low, no details are visible. IS there a way to determine the sweet spot?
#How do I determine the correct ISO and shutter speed for DSLR + Telescope photography?
stiff sleet
halcyon marlin
depends on the dslr but usually it's between 400 and 1600
stiff sleet
depends on the dslr but usually it's between 400 and 1600
For what time?
Its an old D40
halcyon marlin
change the esposure depending on the target
stiff sleet
What should the actual frames look like though?
halcyon marlin
You need to check the histogram
If you're looking at a raw image in windows then it's getting stretched and won't represent how it actually looks
stiff sleet
If you're looking at a raw image in windows then it's getting stretched and won'...
So my histogrma should be in the center?
halcyon marlin
Roughly, closer to the left side
But as long as you're not clipping data it's fine
forest raft
i believe ur exposure have to be long enough to get the shot noise over ur camera's read noise
and since DSLRs have quite high read noises
the exposure kinda depends
oh man
so like
in bortle 1 u need 8 mins minimum if u want to get ur shot noise over
in bortle 2 its 5 mins
in bortle 3 its 2.5 mins
in bortle 4 its 75 secs
in bortle 5 its 40secs
in bortle 6 its 20 secs
in bortle 7 its 10 secs
in bortle 8 its 5 sec
and keep in mind u can absolutely go above these exposure times
these are jst the minimum to like get enough light on ur sensor to overcome the read noise btw
and if ur using a light pollution filter like the optolong l-extreme u need to increase ur exposure time to like 10 mins
also like this is for like optimal results lol
if ur shooting some like andromeda or orion
ur gon blow everything up lol
so yea u can keep it low that time
this is all for ISO 1600 and F/5.6 lens btw