Saturday, January 10, 2009
January 10th - Bokeh Tapes
Looking at Eric's photo today, I noticed something about the focus and almost fired off an email to him to ask why, and then thought "No - I'll do an experiment to answer my question, and that will be my Bokeh photo for today". So here it is, but I think I need a different lens to really do this experiment. I could only stop down to 4.2 - my lens doesn't go very wide open. So someday when I have a lens that does, I'm gonna redo this experiment. What I expected was to see the 12" mark on the center tape measure be in sharp focus and then somewhere around the 10-1/2 and 11-1/2" marks on the outside tapes be in focus because their angular distance from the lens rather than their straight [linear?] distance from the edge of the table. But at f/4.2 it doesn't really look that way does it? Anyway, here's today's photo 1/20 sec. f/4.2 iso 200.