[Leica] How IR filters affect M8 B&W

[imagist3 at mac.com (Lottermoser George)]

thanks for the clarifying metaphor.
when filters are used in front of the sensor/lens the buckets will  
hold different data than unfiltered data.
got it makes sense.
quite the same as film.
if the data isn't there you can't put it there later.

Fond regards,
George
george@imagist.com
www.imagist.com
http://www.imagist.com/blog
Picture A Week - www.imagist.com/paw_07



On Jun 17, 2008, at 5:44 PM, Henning Wulff wrote:

> The basic point is that the spectral information is divided into  
> three classes, R, G and B and collected in buckets. After that  
> there are only limited means of separating the photons (and  
> translated charge values) and their qualities into their smaller  
> divisions, and that only by comparing what's in one bucket to  
> what's in the adjacent buckets. Software/firmware can do no more.  
> Putting filters in front of the lens whether IR cut or red makes  
> the sorting of information by software a lot easier, as certain  
> variables get reduced in value.
>