I am wondering how many of you actually use the DOF preview button. I have been learning photography for a while, and have never actually used it. I had a difficult time seeing what it actually does. I kind of get it, but it seems like an extra step that is not that easy to see. Honestly it seems that experienced photographers wouldn't really need to use it because they know from experience what the DOF will look like for the aperture they choose. Until I get to that point, it would seem much easier to "cheat" and just take a test shot and look at the LCD screen on a DSLR. I know that wouldn't have worked for film, but technology has made things easier, so why not take advantage of some it. I am shooting mostly portraits, if this makes a difference. Thanks!