Monday, May 27, 2013

Digital Filters for Black and White Conversion

and a rant on grayscale

Several years ago, I was in the Everglades with a photographer who was using a large format film camera, you know, the old boxy kind where the photographer puts his head under a dark cloth and views the scene on a piece of ground glass on the back of the camera. He stopped the car on the dirt road we were following and got out and set up, composing a scene of a cypress dome under a blue sky with some clouds. I did the same, but seeing the scene through the viewfinder of my digital SLR, it looked kind of ho-hum to me. “Can I see what you see on your ground glass?” I asked. Instead of inviting me under his dark cloth, he took the red filter from his lens and held it in front of the lens on my camera. “This is what I see,” he said. Through my viewfinder, everything was red, but I was amazed at the difference in contrast. Later he told me that he could see the light bulb go on over my head. It was indeed an epiphany. It was after that that I started doing black and white digital photography.

I've been meaning to write a blog on this subject ever since it came up in the comments of a blog post, Soft and Hard, some months ago. The digital filters that are available to us in editing software, such as Adobe PhotoShop, let us do the same thing my large-format friend did with that red filter in front of his lens, but without having to carry a set of filters around with us in the field and with infinitely greater variety. We can apply these filters to our color digital photographs after the fact. Then if we aren’t satisfied with the result, we can try a different filter, or with digital sliders, we can alter the effective color of the filter to bring out the subtle nuances of the image we see in our mind's eye. There are other ways in digital editors to create black and white photographs, such as working with the various channels. Creating and manipulating a black and white layer is the method I use, for now.

In his book, Examples: The Making of 40 Photographs, the great master Ansel Adams often tells us of his use of filters. An orange filter was one of his most used. I usually try first the yellow filter and then the red filter, and sometimes adjust the sliders for something roughly between the two. (PhotoShop doesn’t give us a preset orange filter.) A filter will lighten its same color and darken it's complementary color. A blue filter lightens blue and darkens orange; a red filter darkens blue and lightens orange. See the illustration above.  (The purpose of the photos in the illustration is simply to show the versatile tonal editing options available to the digital photographer, and not to demonstrate artistic values.)

A Rant:

Back in the film days, I experimented with black and white film only occasionally. I was almost always disappointed by the prints I got back from the lab. They were bland gray instead of the striking black and white masterpieces I wanted. Since my epiphany I've fallen in love with black and white photography. When I see a scene, I can visualize how it will look as black and white with the effect of a digital filter before I release the shutter.  Usually when I see both a color version and a black and white version of the same image on some photographer’s website, the black and white is really just grayscale. The color has been sucked out if it leaving an anemic semblance. It has the same look as those old black and white prints from the automatic lab that so discouraged me. I know that this poor photographer doesn't know; He hasn't shared my epiphany. Aside from photographs that simply can't be printed in color, such as newspaper pictures, I think there is basically only one reason for a black and white photograph.  It is for the sake of artistic expression.  If the photographer can't make a statement with black and white, he shouldn't bother. Grayscale conversion just isn't the same thing as black and white photography.  I've never had a case of "Gee, I can't decide.  I guess I'll show both."  So please, experiment with black and white, Have fun; be creative.  But keep your grayscales to yourself. 

© 2013 Buck Ward                  The Photographist             

1 comment:

  1. I read this post, then went back and reread Soft and Hard, and I think I understand a little better.

    Maybe a post or two with a little more information on your post processing?