@tech@zwo#51333
I think many ASI2600/6200 users expressed disappointment on this decision here. Also, there is a discussion about it in the Cloudynights forum. Even some potential customers do not consider to buy ASI2600 due to this stupid decsion.
https://www.cloudynights.com/topic/797493-insane-zwo-asi2600mm-gain-settings/
Actually, the native driver can support gain setting larger than 100, and I tested it out with positive effect. The gain limit is just apply to ASCOM driver and ASIAIR which I used most of the time.
I am imaging the C/2021A1 comet recently as the comet appears only near sunrise in my location, so fast f-ratio and high gain one-shot color camera are essential. I feel very upset that I am not able to shot the comet in higher gain with ASIAIR. For Comet, I don't need much Dynamic Range but want to get more ADU in the very limited time as the sun is coming out soon.
I think we have sufficient reasons to allow larger gain settings like what native driver already support. Please, Thanks!