Edit: After many conversations here and elsewhere, I have come to the conclusion that my test has too many variables to be a fair comparison between the cameras. Major flaw #1 was QHY had UVIR-cut filter, ASI had no filter. Major flaw #2 was the seeing differences between nights. I averaged .5 arc seconds combined rms error while shooting with ASI, and about .75 arc seconds combined rms error while shooting with QHY. At 765mm of focal length, the difference in seeing was not trivial. I intend to do a more scientific comparison next time with single exposures, and without post processing, only calibration w/flats/darks/dark flats, dynamic background extraction and photometric color calibration.
Leo Triplet Shootout! Asi071MC-Pro VS QHY247C....
Both have 3 hours of integration, at 3 minute subs, shot at each camera's respective unity gain, both under 50% moonlight. I tried to process them as identically as possible in pixinsight, not to give any preferential treatment. Images alternate: QHY-ASI-QHY-ASI etc.
Full Disclosure: Seeing/Guiding was better during the ASI071 capture, but the QHY247C had an IR-cut filter installed while the ASI071MC-Pro did not. Which explains the color discrepancy, with the red being more dominant in the ASI071MC-Pro image.
Hope you enjoy! Which one do you like better and why?
Higher Res Versions Here:
Scope: Orion Eon 120mm @765mm FL
Cameras: QHY247C and ASI071MC-Pro
Moon Phase: Half
Integration: 3 hours light frames for each stack, with 3 minute subs. Each has 25 flats, 25 dark flats, and 25 darks respectively.
Stacked in DSS and Processed in Pixinsight
First, the QHY247C:
Next, the ASI071MC-Pro:
Edited by mistateo, 23 March 2019 - 05:50 PM.