On Sharpness, ISO and Shutter Speed

Started Nov 29, 2013 | Discussions thread
ferrellmc
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Create a base image with no shutter vibration
In reply to Jack Hogan, Dec 22, 2013

A possible way to test shutter vibration and eliminate the variables would be to take an image with shutter vibration and then compare it to an image without shutter vibration.

To take the image with NO shutter vibration have the camera set up in a dark studio, open the shutter for say 10-20seconds. While the shutter is open fire a strobe(s) off camera to expose the image. This exposure will have no vibration from a shutter release.

Then take an image normally but don't use the strobes, their duration is too short, use hot lights or similar.

If everything is the same: lens, focus, ISO, tripod mount, distance etc. the difference in the two images is shutter vibration. Then do the MTF mapper and you will know exactly how much the shutter vibration matters.

This could be done at different shutter speeds.

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