I've tried shooting out M33 last night, and understood how faint it is. Everything worked against was shooting towards light polluted area, it was not too high above horizon and half way towards my session I tumbled upon rooftop of my house. So here what I got with 20-ish min of total integration time, not much(small smudge towards middle). M33 shot using Canon EOS T3i, 135mm, F4, ISO 800. #astropic