uisng the channel mixer (in photoshop) to make black and whites

I was shown this method of making black and white photos before, but i havent had to shoot anything black and white just yet, and i found the function on the camera that will do this anyway, but it may be handy some day, or for some one. anyway, check out this tutorial showing you how to turn color photos into black and white using the channel mixer

bk_keywords:photoshop