first (half decent) light with QHY9

[Phil Hart]

Originally Posted by Moon

Phil
Any idea why there are more stars in the 20D image? Could it be the slightly larger pixel size or is it the processing?

The QHY9 image is largely h-alpha which really cuts down the relative brightness of the stars - while most of the nebula comes through in full strength, only a tiny percentage of the broadband starlight is captured. I used some broadband luminance in the image composition, but only in bright areas.. so that has added back in the bright stars but not the faint ones. The 20D image is seeing the full spectrum for each star over the full four hours.

[Phil Hart]

Originally Posted by CometGuy

Hi Phil,

Have you done the heater board mod yet? (its well worth it!)

Terry

Yes.. I was getting fogging on the sensor window on my first attempts so took it to Theo who installed the heater element very easily. No issues now..