Hi All,
I shoot w/ a Sinar F2 utilizing lenses from 75mm to 150mm generally w/ a bag bellows. I use Fuji Acros quickloads in a fuji quickload holder. My exposures are longish, from 12 sec to 2 min.
The work I do is generally shot during civil twilight and I try to keep the skies pretty dark. I have been working on a commission that required me to shoot later in the morning and have brighter skies and thats when I noticed that I have these uneven and blotchy skies. They appear to be shadows and highlights in the skies that are completely clear southern california mornings. I have borrowed other lenses and still seem to have the same problem. Obviously it goes away when full daylight skies blow out to white and when they are extremely dark. Do I have a leaky bellows, is it the holder? Please help.