Re: Frightening *istD experience

[Paul Stenquist]

One second is more than 1/125. I said at least 1/125. More is okay. But 
you're right, the minimum is 1/150. But when you turn the tv dial in 
manual mode, the next step from 1/125 is 1/80th. So 1/125 is the 
fastest I can shoot in flash synch mode.
On Mar 8, 2004, at 6:31 PM, Tanya Mayer Photography wrote:

Paul, you said: "On *istD the shutter has to be open at least 1/125 to 
synch
with the flash..."

I totally don't get this.  I shoot with mine right down to a second
sometimes, and the sync speed goes up to 1/150.
Can you explain what you mean by this?

tan

-----Original Message-----
From: Paul Stenquist [mailto:[EMAIL PROTECTED]
Sent: Tuesday, 9 March 2004 6:07 AM
To: [EMAIL PROTECTED]
Subject: Re: Frightening *istD experience
Flash exposures are based primarily on f-stop. The flash duration is 
the
timing element. On *istD the shutter has to be open at least 1/125 to
synch with the flash, but the flash duration fills only part of that
window. I can get approximately the same flash exposure if the shutter 
is
open 1/30 but more of the room light will intrude, affecting the color
balance and exposure. Shooting at f16 @ 1/125 in a moderatly lit room, 
the
ambient light is largely "killed." It's a minimal part of the exposure 
and
has no real effect.

Shel Belinkoff wrote:

OK, I suppose this is some "flash fact," so forgive my
ignorance.  How does the shutter speed "kill" ambient
light?  What do you mean by kill?
Paul Stenquist wrote:
Good idea for the studio shoots. I always shoot at 1/125th, because I
like as much shutter speed as possible to kill the ambient light.