Gains number settings

[gonzostar]

Hi

I have a ZWO ASI385MC camera.  Initially used for lunar and planetary imaging. However i want to explore deep sky a little more. Had some success with brighter objects. 

On the graph in the manual I'm a little confused which gain settings i should use. The read noise drops off at 60, but on the other graph the gain e-adu  says 135. Do i use 60 or 135 or in between? I've being using again 60 with 30s subs with my set up. Does this sound about correct? Any words of wisdom will be greatly appreciated

Cheers

Dean 

[The Lazy Astronomer]

2 hours ago, gonzostar said:

Hi

I have a ZWO ASI385MC camera.  Initially used for lunar and planetary imaging. However i want to explore deep sky a little more. Had some success with brighter objects. 

On the graph in the manual I'm a little confused which gain settings i should use. The read noise drops off at 60, but on the other graph the gain e-adu  says 135. Do i use 60 or 135 or in between? I've being using again 60 with 30s subs with my set up. Does this sound about correct? Any words of wisdom will be greatly appreciated

Cheers

Dean 

The graphs are highlighting different aspects of the camera's performance. 

The read noise graph highlights the point at which the camera enters high conversion gain mode.

The gain e-/adu graph highlights what is known as "unity gain", where 1 electron = 1 adu value.

For deep sky, I would say, in general, unity gain is a good place to start off, and you can experiment with different gain settings later.

[gonzostar]

Thankyou for reply a little clearer. So in my camera's case the unity gain is 60? 

Cheers

Dean 

[The Lazy Astronomer]

4 hours ago, gonzostar said:

Thankyou for reply a little clearer. So in my camera's case the unity gain is 60? 

Cheers

Dean 

Unity for your camera is 135.

[gonzostar]

Thankyou will give at go 👍