>>2981234>>2981235Then I guess it's your camera somehow.
>>2981226's photo just shows vignetting which is caused by the lens, but yours doesn't look like it. Also some scanners cause streaks when they are about to die because the sensor sensitivity has become uneven, but those are usually more clearly defined. May want to keep an eye on your scanner in case they get worse. I've shot C-41 for years and always had nice, clean skies, except for the one occasion when my 2nd hand scanner died of old age and caused a dark streak across the frame.
