I have a 127 Mak-Cass on a Sirius EQ mount. I prefer OSC cameras and live with Bortle 6 skies.
I started with the original Orion Starshoot DSC Cooled camera with a SAC F3/F5 reducer screwed into the nose piece of the camera.
I was pleased with what I could get from it, with my 60-90 second frames. (I never Bin)
When Windows XP retired, so did this camera (which still works nicely, with Windows XP)
Original Starshoot DSC CCD Specs:
Effective pixels: 752H x 582V (440k pixels)
Total pixels: 795H x 596V (470k pixels)
Chip size: 6.00mmH x 4.96mmV
Pixel size: 6.5umH x 6.25umV
I then switched to using my Canon T5i attached to a Celestron F/6.3 Reducer
Effective pixels: 5184H x 3456V )(18M pixels)
Chip size: 22.3mm x 14.9mm (APS-C)
Pixel size: 4.30umH x 4.30umV
I prefer keeping the F6.3 Reducer in place and I believe a cooled OSC astro camera may be more sensitive than my T5i and allow me to capture more data in less time.
I was thinking that either one of these cameras would be a better fit for my imaging train, sky conditions,etc. I do prefer the ASI line since I'm now using the 290mm-mini for my guide camera.
ASI294MC-PRO 11.7mp 4.63 um pixels, 4144x2822, backlit, zero amp glow, 4/3" sensor 23.2mm diagonal, readnoise 1.2e, qe 75%, full well 63.7ke, exp 32us-2000s, usb3/usb2
ASI533MC-PRO 9.07mp 3.76 um pixels, 3008x3008, backlit, zero amp glow, 11.31mmx11.31mm sensor, readnoise 1.0e-3.8e, qe >80%, full well 50ke, exp 32us-2000s, usb3
Was it the original pixel size (6.25um) that gave me the images I liked? or the fact that it was cooled?
I'm not certain which camera would be a better fit for my setup...