Paul Franklin Stregevsky asked about preferred apertures for photography. I take my bird pictures wide open and focus for the catchlights in the eye. I usually stop way down with my 20mm because I customarily put an object in the close foreground when I shoot landscapes with it and I want all the DOF I can get. f/8 or f/11 for most everything else. Supposedly those are the optimum apertures for sharpness for just about any lens design there is. I should add that I use a tripod for about 90% of my pictures and I'm working on my laziness to eliminate that other 10%. One other general exposure preference that I have is 1/2 sec shutter speed for waterfalls. That's pretty much the only time I use shutter priority mode. That shutter speed usually gives me the results that I want. Good question!
Tom Reese
