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  Photography Forum: Digital Darkroom Forum: 
  Q. Filters
Stefan Fischli
Asked by Stefan Fischli    (K=927) on 3/26/2006 
Hi! When I used conventional B/W-films, sometimes i used a filter (yellow/orange) to accentuate certain details (ie. clouds). Is there a Photoshop plug-in that's doing the same or how can i simulate the effects of such filters? thanx and best regards!
stefan


    



 Jeroen Wenting  Donor  (K=25317) - Comment Date 3/26/2006
why not use a real camera, film, and a filter?
Digital cameras don't even come close to what film (and especially decent black and white film) can achieve.




Stefan Fischli
 Stefan Fischli   (K=927) - Comment Date 3/26/2006
thanks. i know this! there are reasons why i'm using digital photography, and i'm interested about other solutions... if anybody knows them




Helen Bach
 Helen Bach   (K=2331) - Comment Date 3/26/2006
Stefan,

I assume that you are starting with an RGB file.

You don't need plug-ins for Photoshop, just use the Channel Mixer. Select greyscale output. Look at each of the channels, and mix them to achieve the required result. By adding layers, each with a different channel mix, and selectively masking them you can emulate the use of different filters in different parts of the image.

A light yellow filter is a light minus-blue filter, so you would emulate that by mixing in less of the blue channel than the red and green. Giving exact RGB mix proportions as equivalents of camera filters is a bit pointless because PS offers infinite possibilities.

Best,
Helen




Stefan Fischli
 Stefan Fischli   (K=927) - Comment Date 3/26/2006
helen, thank you very much for this informations. it works! regards stefan





 Dave Baxter   (K=10) - Comment Date 3/31/2006
I like the actions from www.mountphoto.co.uk/actions.htm The first volume has plenty of options for BW photography (FWIW the 2nd volume has some nice toning actions as well).
DB




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