On 5 May 2010 08:45, Graydon <gray...@marost.ca> wrote:
>
> I think it's pretty much good for user-induced shake all the time.
> (800mm mirror lens hand-held, for example.) It's a question of when the
> user-induced shake is the dominant contributor to the image being
> blurry, and if it's useful then. (so far as I can tell, if you get to
> 1/15, the answer is no, because the amplitude of the shake is too big in
> relation to the shutter speed.)
>
> -- Graydon
I have found my K10D's SR to be useful when hand-holding my 600mm
mirror lens, but much less useful than at lower focal lengths. With a
50mm lens I can consistently shoot sharp at 1/10s (which is about 3
stops of "help"), but with the 600mm I can't go much slower than
1/400s or so (which is about 1 stop of "help"). I keep meaning to test
setting the SR to 800mm when using the mirror lens to see if that
improves things.
Cheers,
--M.
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