Regards, Alan Chan http://www.pbase.com/wlachan
Actually, you decrease sharpness by using a lens mount to tripod attachment point. The shutter, being farther away from the fulcrum (the tripod head wants to be a pivot point) gives more opportunity for shutter/mirror bounce to manifest itself. At least that's what I think.
Lens adaptors are a compromise to keep from torquing the camera body out of shape with the heavy lens.
Try another test: Put a support of some sort from the camera body to a tripod leg, see if that doesn't do some good.
William Robb
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