Re: [Leica] in the dark with the summilux

[Edward Meyers <aghalide@panix.com>]

It takes a certain level of exposure to cause a minimum amount of
density in the negative. Once that threshold is reached, then
the exposure causes density. The flare helps to get to that
threshold so it takes slightly less image exposure to show up as
density.
When you take your film throught the x-ray machines. The
xray affect is cummulative. Although the affect might be 
on the film, it might not record as visual density, until
the film is xrayed enough times to reach the threshold and
cause visible damage. Ed

On Mon, 7 Aug 2000, Craig Roberts wrote:

> 
> "I've seen black and white photographs where the photographer used an
> uncoated lens to gain some fog density..."
> 
> I'm confused.  If a lens is flare-prone, isn't the alleged "shadow detail"
> actually just scattered light veiling...or "graying out" the darker areas?
> I don't understand how any real detail could be registered.  I'm not
> arguing...I honestly don't understand.  Can someone explain, please?
> 
> Craig
> Boston
> 
> 
> 
>