On Sharpness, ISO and Shutter Speed

Started Nov 29, 2013 | Discussions thread
ProfHankD Veteran Member • Posts: 5,386
Re: Another possible experiment

Anders W wrote:

This prevents the camera from being displaced but not from vibrating. Result: No sign of blur. So at least in this case, brute displacement rather than vibration is the cause.

Well, I've never trusted tripods as much as bracing on part of a building anyway....  

For what it's worth, even with everything bolted to a concrete block, many cameras do suffer from what you're calling physical displacement. For example, bolting-down a camera and taking a series of non-blurry images, many camera+lens combos (even without mechanical image stabilization) will not quite have images align at the pixel level. The culprit there is apparently play in the lens system, which can be made much more visible if the system tries to focus for each shot, but can be induced by things as simple as the whack from the aperture stop-down lever on Sony A-mounts. Old (high-mass, tight-tolerance) manual lenses don't seem to have this problem at all.

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