Try the Channel Mixer to convert to B & W, leave it RGB, click Monochrome and adjust the three R-G-B sliders to add up to 100% (or slightly more or less depending on personal taste). As far as the Stop Sign, I'd select it and save it as a layer and simply drag it back to your Monochromed image. Now the Stop Sign is unchanged and has the original shadows and highlights.
Here is a different approach by one of the premier B & W photogs in the business - Greg Gorman
http://www.gormanphotography.com/bw_conversion.pdf
toucan,
VERY nice. You seem to have lost a tiny bit of shadow on the skin but the modified image looks great!
Here is a different approach by one of the premier B & W photogs in the business - Greg Gorman
http://www.gormanphotography.com/bw_conversion.pdf
toucan,
VERY nice. You seem to have lost a tiny bit of shadow on the skin but the modified image looks great!