Comment on Tiger Cub Resub by hoboinaschoolbus

9/10 times it's a piece of dust. Your camera should have a "cleaning mode" or if it doesn't set it to bulb and be careful lol. In good light take the blower and blow the dust off your sensor. You could purchase the cleaning wipes, but most likely don't need too, plus wet cleaning makes me kind of nervous. The other option is to have them do it. I don't know about yours but the shops here send stuff out so it takes 3 weeks and it costs 60$