Trailing curtain synch with K10D and FA 540 flash.
http://photo.net/photodb/photo?photo_id=6315560&size=lg
On Jul 3, 2010, at 11:08 AM, Godfrey DiGiorgi wrote:
On Sat, Jul 3, 2010 at 1:56 AM, Bob W <[email protected]> wrote:
All my FourThirds and Micro-FourThirds bodies allow me to enable
second curtain sync any time I want, with any flash. IIRC, both my
Sony R1 and my Canon 10D allowed the same.
The algorithm is very simple: the flash is triggered about 300ms
before the second curtain is released. So it obviously works best
with
exposure times of a half second or longer, but then that's when I'd
use second curtain sync anyway.
I've found it most effective for my taste at 1/15th second,
generally when
there's already quite a lot of ambient light in the scene. These
pictures
from midsummer a few years ago are my most successful and (I think)
effective efforts, shot at 1/15th. All shot with an Oly E-1 and Oly
flash of
some sort.
Start here, and click through about 8 snaps:
<http://www.web-options.com/Pick2008/content/_6207819_large.html>
Thanks for the photos ... good stuff!
The trigger lead time is shorter than I wrote. A 125 second flash burn
is 8 ms and that's a long burn; they probably do trigger with 30 ms
lead, not 300. :-)
--
Godfrey
godfreydigiorgi.posterous.com
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