Need help, darks don't work?

firstc8

While waiting for clear sky, I decided to play some longer exposures with my 120mc-s indoor, shooting out a window at distant street lights behind a tree. Focusing wasn't my concern.

After taking 20x32sec lights, darks and bias, stacked with DSS, a large amount of pixels could not be removed. According to Sharpcap the sensor temp was 23C.

I am attaching one light frame and the final stacked frame here. They both were processed in PS to bring out the noises. Can experts let me know why darks were not able to remove some of the noises?

Thanks!

Sam@ZWO

there is dead pixels when you use very high gain or high speed output

so you can set the camera to "low speed" and adjust the gain lower

firstc8

Sam wrote:
there is dead pixels when you use very high gain or high speed output

so you can set the camera to "low speed" and adjust the gain lower

Is this to do with 120mc? In other words, a better camera/censor will not have the same problem?

Sam@ZWO

firstC8 wrote:
Sam wrote:there is dead pixels when you use very high gain or high speed output

so you can set the camera to "low speed" and adjust the gain lower

Is this to do with 120mc? In other words, a better camera/censor will not have the same problem?

yes, this is a 120 only problem

sony's sensor don't have such problem