[Leica] Question---Filters for B/W

[pdzwig at summaventures.com (Peter Dzwig)]

Bill,

try:

http://www.acecam.com/magazine/filters-faq.html

the problem is always the compensation if the filter isn't marked.

All the best,

Peter Dzwig


Bill Smith wrote:

> Didier:
>  
> Many thanks for your easy to understand info!
>  
> Bill
> 
> Didier Ludwig <rangefinder@screengang.com> wrote:
> Bill
> 
> Cant say for 400 TMx in particular, but I think you can apply the general 
> rules like for any other B&W film: a color filter on B&W film makes it's 
> own color brighter, and it's complimentary color darker. ISO400 films are 
> ideal to use high factored (dark) color filters at daylight, especially if 
> you do not want to stop down to 16 or 22.
> 
> Imagine the colors in a circle, each on a 1/6th position: Red, Yellow, 
> Green, Cyan, Blue, Magenta. The complimentary color is always 180 degrees 
> on the other side. Of course the filter applies not only on it's color and 
> it's complimentary color, but as well to the neighbours of them, too, with 
> decreasing effect. Thats why red, orange (which is on a 1/12th position 
> between R and Y), and yellow have similar, but not identic effects.
> 
> Red, Orange, Yellow, are making the blue tones darker (dramatic skies), 
> but 
> make faces brighter, so not recommended for portraits, but for daylight 
> architecture and nature photography.
> 
> Green gives more contrasts on face's skins (darkens magenta), more 
> greytones in green environments (woods, fields).
> 
> It doesn't make sense to carry R, Y and O all the time with you. I have a 
> R 
> (very dark, high filter factor) and a Y-G filter (low factor) with me. 
> Green-Yellow is good for daily use, makes the skies a little bit darker as 
> well as skin tones, and has a low factor.
> 
> Didier
>