I'll take a look at implementing some of this over the weekend. I think the illumination differences between the even and odd field would only occur with short exposures since the readout time would become insignificant at longer exposures. I don't have this camera, but I do have a Meade DSI I which also has an interlaced sensor and see this same thing. I do agree with your point regarding the readout time. 2s is crazy for a sensor that small and would make it almost useless for a guide cam.