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Good going Allan. The M42 shot looks a little dim to me, but the colour balance seems good and the details are beautiful.
I've found with an OSC camera, Binning 2x2 for Ha is not the best way to do it.. by binning 2x2, you're getting all the bayer matrix colours (RGGB) in one pixel... If you take a 10min Ha sub Bin 1x1, then open the colour image up in Photoshop, take a look at the green and blue channels, they will be mostly noise, with a hint of information (because at 40nm you're letting in plenty of other light..) Binned 2x2, all the noise that would have plagued the green and blue channel will be trapped in the image with the Ha data...
Since I worked that out I take all my OSC Ha filtered data at Bin 1x1, stack the subs with full calibration frames, then when it gets opened up in photoshop, I will extract the Red channel only, and save that as the Ha data. I then combine that with my RGB data.
Here's an example shot of M42 I did in Ha last year with my QHY8 (Same Lumicon Night Sky Ha filter and the UV/IR filter giving me about 40nm Ha) That is 8x600s + 13x30sec with no darks, just flats and bias frames used, Bin 1x1 and R channel extraction..
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