On Sharpness, ISO and Shutter Speed

Started Nov 29, 2013 | Discussions thread
The_Suede
Contributing MemberPosts: 602
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Re: Quite a lot of problem parameters...
In reply to Anders W, Dec 1, 2013

Falk's studies are here, and there's others out there too. He's done some more on the same site too, with other cameras. I also have some accelerometer studies on the older D700 that basically say just the same thing, regarding the time spread of the vibration.

Someone in our astro-group did formal tests with long lenses collar mounted, on starscapes (actually distant point-source lights, not really "stars"...) :), I'll see if I find them, and get back to you. That was just for two cameras though, but I've found the general theory sound in practice too. Placing a hand on the camera when shooting with long lenses mounted to the collar gives sharper images in the 1/30-1/200s range than using timer release or remote release, something I've found that others that I trust to be reasonably methodical about their photography to concur on.

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