Yellow, Blue, Red - Picasa Filtered B&W Edits

Yellow Filter

Blue Filter

Red Filter

Picasa has a feature that allows you to simulate the effects of different colored lens filters on a black and white photograph (see original Kodachrome in the Eugene post below.)  The differences turned out to be a little more subtle than ususal,  probably because of the contrast level of the slide, but as you can see above, the middle blue filter does reduce contrast. The bottom red filter just about eliminates the "SP" on the nose, which you would expect.