Re: long-time exposures with *istD

[Herb Chong]

the non-random noise is what gets surprised by the dark field exposure. this 
detects hot spots and stuck pixels better.

Herb...
----- Original Message ----- 
From: "Nenad Djurdjevic" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Friday, September 10, 2004 11:36 AM
Subject: Re: long-time exposures with *istD


My understanding is that noise does not necessarily conform to a pattern 
but
is random.  If that is the case wouldn't it be more logical for the camera
to make another exposure with the shutter open, compare the two shots and
delete anything that did not occur in both photos?  (Please forgive my
ignorance if I have missed something obvious ;-).