Had a go under Bortle 6 skies with a 4 inch refractor photographing NGC253. I've shot this one a few times with a DSLR but this time I took it with a ASI224mc and a ASI120mms. 2hrs of data comprising of RGB, Luminance and some Ha to reveal its nebulosity. The only guiding that was done was with the 7nm Ha filter data because it needed so much more exposure. Equipment used: SW Esprit 100 on an HEQ5pro mount. At 550mm focal length, this galaxy barely fits in the frame of these small camera sensors.
PS. Added this data to shots I took over 2 nights a year apart with an 8 inch Newtonian and DSLR, about 3 years ago. The Ha really pops out.
Last edited by Mickoid; 14-10-2022 at 05:53 PM.
Reason: Reprocess with added data
I didn't use the ASI120mm for guiding. When shooting with the Ha filter and the ASI120mm, I used the ASI224mc for guiding. That was the only guiding I did, the rest, including the Luminance with the 120, was unguided.
Nice image, Michael. I like how you've framed the image - using a smaller sensor has advantages. It's nice to get a target using all of that expensive silicon real estate
