It matters on longer exposures containing a flash. 1st curtain means
the flash is at the beginning of the exposure &2nd curtain means the
flash image is at the end of the exposure. Most cameras default to 1st
curtain.
Imagine a dancer against a black background and a 1 second
exposure time. 2nd curtain flash would capture his trail, ending with
the flash image.
Tom
On Thursday, November 22, 2001 at 17:27, Daniel J. Mitchell
<olympus@xxxxxxxxxxxxxxx>
wrote re "RE: Was: [OM] Digital Camera that t" saying:
> > All the metal multi-blade shutters create a slit too at high speeds -
> > highest flash sync is simply the highest speed at which the shutter
is
> > totally open for ANY time.
>
> What's the difference between first-curtain and second-curtain flash
sync?
> I keep seeing this mentioned in camera specs, and while it's pretty
obvious
> what it _means_ (does it flash as soon as the first curtain's fully
open, or
> just before the second one starts to close) I don't see what it gains
you to
> be able to choose.
------- Quidquid latine dictum sit, altum viditur -----------------
,__@ Tom A. Trottier +1 613 860-6633 fax:231-
6115
_-\_<, 758 Albert St., Ottawa Ontario Canada K1R
7V8
(*)/'(*) ICQ:57647974 Tom@xxxxxxxxxxxxx N45.412
W75.714
---------------------------------------------------------------------
Laws are the spider's webs which, if anything small falls
into them
they ensnare it, but large things break through and
escape.
--Solon, statesman (c.638-c558 BCE)
"They that can give up essential liberty to obtain a little
temporary
safety deserve neither liberty nor safety." --
Benjamin Franklin
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|