Photo Friday: Depth Perception
The problem in photography, the main one I encountered when I started out, was the depth of field issue. Depth of field refers to the part of the photo that is sharply in focus and how much of the photo is within that field. Aperture plays an incredibly important role in this, in that if the number is lower (f2.8 vs. f22) less of the photo will be in sharp focus. If you play with aperture, you’ll get those lovely shots wherein the subject is in focus while the background (and foreground, depending on the photo) will be out of focus. It creates some lovely effects, creating depth within a two dimensional medium. If you push your aperture as high up as it will go, you’ll get superior depth of focus, in that everything will be in sharp detail, but it will flatten out the image. It’s interesting how a photo can look like it has less depth by being entirely in focus, while a photo with a small space in focus will look like it has more depth.
Anyway, here’s a photo of Giotto’s Campanile in Florence that demonstrates what happens to a photo at f3.5 at 18mm. Some is in focus, some is not.