On 15 Jul 2005 at 17:54, Godfrey DiGiorgi wrote:

> On Jul 15, 2005, at 5:20 PM, Rob Studdert wrote:
> 
> > The Pentax subtractive NR should only degrade the image where the  
> > image has
> > hot/stuck pixels, it shouldn't alter the overall noise pattern as  
> > it appears to
> > only affect pixels over a certain threshold. So if anyone is seeing  
> > overall
> > image degradation with NR on then I assume that the camera is faulty.
> 
> The word "should" is aptly used. And the *ist DS NR is not supposed  
> to be active at any shutter speed over 1/25 second anyway.
> 
> However, several folks have reported that they see some degradation   
> with NR enabled at short shutter times, so I just leave it off unless  
> I need it for long exposures.

Test it. It doesn't degrade the image in or out of the active shutter speeds 
(not in my *ist D anyhow). I can't hear the difference between two digital 
devices connected using AES/EBU, wired co-axial or TOSLink optical digital 
audio stream either, some claim they can :-)


Rob Studdert
HURSTVILLE AUSTRALIA
Tel +61-2-9554-4110
UTC(GMT)  +10 Hours
[EMAIL PROTECTED]
http://members.ozemail.com.au/~distudio/publications/
Pentax user since 1986, PDMLer since 1998

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