I use a Sony a6000 with a Samyang 135mm F2.0. I think it was set at F2.0, 1 sec exposure and 200 iso.
This is not a raw image through.
I stacked 10 frames in total (that was shot in 2 batches) to double the resolution in each dimension and to help with the denoising, and to top it off, this is a detail crop from the final stacked frame, that is about 2500x1700px.
I hope this helps. :)