gain setting for deep sky

Post your Deepsky images taken with ZWO Products here.
betacapricorni
Posts: 98
Joined: Wed Apr 10, 2013 9:56 pm

gain setting for deep sky

Post by betacapricorni » Mon Jun 03, 2013 7:35 pm

dear all,
i'm making a cold box for the asi120mm and i'd like to try to take some halfa nebula images and classic deep sky object. as you know the cooling ccd has a pre setting gain value, i'd like to know what is this value for asi120mm
thanx so much!!
Andrea

User avatar
Sam
Posts: 2799
Joined: Thu Feb 21, 2013 2:51 am

Re: gain setting for deep sky

Post by Sam » Sun Jun 09, 2013 2:34 pm

I usually set 50-60
ZWO Founder
Location:lon=120.6 lat=31.3
SuZhou China

betacapricorni
Posts: 98
Joined: Wed Apr 10, 2013 9:56 pm

Re: R: gain setting for deep sky

Post by betacapricorni » Sun Jun 09, 2013 2:53 pm

For how many second exposure? I have to take 4 or 5 minutes for shot. With gain at 50 or 60 % didn't I risk cmos saturation?

Inviato dal mio U8800pro con Tapatalk 2

User avatar
Sam
Posts: 2799
Joined: Thu Feb 21, 2013 2:51 am

Re: gain setting for deep sky

Post by Sam » Tue Jun 11, 2013 3:05 am

exposure only 5-10s
otherwise there is lofs of noise without cooling
ZWO Founder
Location:lon=120.6 lat=31.3
SuZhou China

betacapricorni
Posts: 98
Joined: Wed Apr 10, 2013 9:56 pm

Re: gain setting for deep sky

Post by betacapricorni » Tue Jun 11, 2013 6:04 am

i can't go over 10 seconds? i'd like to make halfa session....

User avatar
Sam
Posts: 2799
Joined: Thu Feb 21, 2013 2:51 am

Re: gain setting for deep sky

Post by Sam » Sun Jun 16, 2013 3:10 pm

that's suggested value without cooling
ZWO Founder
Location:lon=120.6 lat=31.3
SuZhou China

betacapricorni
Posts: 98
Joined: Wed Apr 10, 2013 9:56 pm

Re: gain setting for deep sky

Post by betacapricorni » Mon Jun 17, 2013 7:45 am

Sam no problem, i've done a cold box the camera is more or less at 0°C (cmos 4 or 5 i think ) i think it's enought for 4 minutes or not? I take some dark too

robbeh
Posts: 22
Joined: Wed May 01, 2013 2:17 pm

Re: gain setting for deep sky

Post by robbeh » Fri Jun 21, 2013 7:57 pm

Hi, I did some 2min exposures on M109 with my Peltier-Modded Cam, gain set to 5 in FC. Sensor temp. Was about 5 degree centigrade. Here is the result: http://www.astrobin.com/44191/
robbeh

User avatar
Sam
Posts: 2799
Joined: Thu Feb 21, 2013 2:51 am

Re: gain setting for deep sky

Post by Sam » Sun Jun 23, 2013 6:07 am

robbeh wrote:Hi, I did some 2min exposures on M109 with my Peltier-Modded Cam, gain set to 5 in FC. Sensor temp. Was about 5 degree centigrade. Here is the result: http://www.astrobin.com/44191/
robbeh
I think 2 mins is too long.
I prefer short exposure and stack more :D
ZWO Founder
Location:lon=120.6 lat=31.3
SuZhou China

User avatar
Sam
Posts: 2799
Joined: Thu Feb 21, 2013 2:51 am

Re: gain setting for deep sky

Post by Sam » Sun Jun 23, 2013 6:08 am

you can exposure minutes if you can cold it
ZWO Founder
Location:lon=120.6 lat=31.3
SuZhou China

Post Reply