Anyone else notice this?
I was testing my new light meter and calibrating it to the 1DsMarkII. I was shooting a MacBeth chart, and to test the shutter sync speed I decided to put a gray seamless behind it in order to better show the shutter
When I did the high speed sync test, I found that at the 1/250th stated sync speed, I get a vertical band along the bottom of the frame I from the shutter. It isn't real pronounced, Capture One only shows it drops off about 10% or so, but it is there and can be easily seen. When I change to 1/180th, its gone.
Would the shutter drift like this? Drifting slower such that it will effect the sync speed. It seems very reasonable, but then again I don't know how the shutter mechanism is engineered to know for sure.
Just wondering if its time to send in the camera for a cleaning, checkup. Or if its entirely normal, even though its just under what the specs show.