I would not be surprised if many or most (almost all??) cameras might suffer a little for the effects of the shutter upon sharpness when measured with a laser when used with long lenses.
I still remember we would try to check for vibrations with long lenses with a nickel placed on its edge and to watch for the affect when the camera shutter was released. When this was done with my Leica 560mm telyt lens (which was totally re-balanced and tripod mounted and cameras including my Leica R8 with the mirror locked up the nickel would fall off of the end of the lens dues to shutter vibration/shock. We would normally learn which shutter speeds to try to avoid using.
Rich
Nov 24, 2013 at 01:21 PM
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