Archived posting to the Leica Users Group, 2005/01/21

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Subject: [Leica] 20D B&W
From: s.dimitrov at (Slobodan Dimitrov)
Date: Fri Jan 21 19:14:06 2005
References: <000d01c50002$d9c35940$>

I just played with an image that has problems at both ends of the 
exposure, switching from color and BW.
You're right about the illusion of visual acceptability.
S. Dimitrov

On Jan 21, 2005, at 1:47 PM, B. D. Colen wrote:

> I think that it looks better, Slobodan, because "grain" is more
> acceptable in bw - and because the noise isn't seen as color speckles.
> One way to reduce noise in low light - to answer Adam's question - is 
> to
> routinely OVER expose by about 1/3 ev in order to make sure that you
> don't UNDER expose. I know this runs counter to all the digital advice 
> -
> expose digital like slide film, exposing for the highlights. At 1/3 ev
> over you're unlikely to really blow out the highlights, and you're less
> likely to underexpose. And underexposure causes a huge increase in
> noise.
> Ironically, however I am absolutely convinced that there is more detail
> in the shadows in digital exposed in low light than there is film. I
> have seen this time and time again.
> B. D.

Replies: Reply from bdcolen at (B. D. Colen) ([Leica] 20D B&W)
In reply to: Message from bdcolen at (B. D. Colen) ([Leica] 20D B&W)