[Leica] Query re B&W photography in digital

[clive.moss at gmail.com (Clive Moss)]

Click went my mind instead of the shutter. So the only filters I can  
"accurately" apply after the exposure are those that alter the  
balance of the Bayer RGB filters. "Pure" red, or green, or blue  
should work. A linear combination of "Pure" red or green or blue as  
defined by the Bayer filters on a specific camera should also work.  
Some non-linear combinations could be handled by curves of RGB. But a  
filter that cuts a weird selective swath across RGB must go before  
the lens - like polarizers, or gradations, or -- what else?
--
Clive
http://clive.moss.net/blog



On Jul 19, 2007, at Jul 19,  10:17 AM, Henning Wulff wrote:

>  Once the wrong information hits a certain sensor element, it can't  
> be distinguished from the other information. Remember, sensor  
> elements are only buckets that collect photons; all the information  
> that the sensor element reports is the number of photons, not the  
> wavelength that it came in on.
>
> If you want strong filter effects, good colour balance from 2000?K  
> scenes, polarizer effects - use a filter. You can't get the effects  
> through post processing.