Camera Gain for ATIK 490ex

[cskozlowski]

Anyone know what the gain (e-/ADU) is for an ATIK 490ex CCD camera.   The readout noise is given in the literature (5 e-) but I can find no mention of the gain for this camera.  Just trying to figure out optimal subexposure times for each of my filters.

[Andrew]

Assuming this is a mono camera, the gain is about 3.2