Separate Camera Calibration

[all-on-black]

As time is limited for us in the UK, I've just been out getting some subs when I was trying to think of a way to save time and multitask.

So here's my question:

Is it possible to have 2 identical cameras, one taking lights on the scope, and the other with the lens cap on taking darks/bias?

I have 2 canon DSLR's, a 500d and a 450d. From what I can tell they are nigh on exactly the same apart from slight programming differences and the obvious number of MP's.

If they are both out at the same time, they will be the same temperature. So the noise levels should be the same (ish?)

If this would work then I would be able to take many more calibration frames as well as being able to take more light frames.

So, what's your thoughts?

[sidelight]

They are not the same camera so the noise pattern would be different. It needs to be the same camera.

Cheers

Ross

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[swag72]

As far as I am aware, noise details and hot pixels are specific to each camera, so the noise on one will not be in the same places / pixels on another camera.

[wxsatuser]

Even the same model will be different.

[all-on-black]

Ah.. I guess if it was that simple then everyone would be doing it!

Looks like i'll have to continue slowly building up my calibration library then!

Cheers for the replies!