cunim
Well-known member
I rarely use the 645DF with my IQ back, but when I do one thing drives me nuts. The iris is constantly resetting itself. After puzzling about this for a while, I discovered why.
The lens release button on the side is very sensitive. During normal use of the camera my hand brushes by the button and that causes a momentary disconnect of the lens electronics (not the lens). The result is that the body resets the f stop to the closed position. The button doesn't need to move much - just a twitch is enough.
As I said, happens to me all the time and I usually first notice it when looking at the image on the back and wondering why it is suddenly dark.
Maybe I am holding the camera strangely. Anyone else experienced this?
Peter
The lens release button on the side is very sensitive. During normal use of the camera my hand brushes by the button and that causes a momentary disconnect of the lens electronics (not the lens). The result is that the body resets the f stop to the closed position. The button doesn't need to move much - just a twitch is enough.
As I said, happens to me all the time and I usually first notice it when looking at the image on the back and wondering why it is suddenly dark.
Maybe I am holding the camera strangely. Anyone else experienced this?
Peter