music_ki wrote: > This may be a ridiculous questions, but I'm wondering about the > vertical positions of objects. In terms of position relative to the > horizon it's easy enough to use a compass, but I find that I'm > always off on the position vertically when I look at the CDC charts. > I always think that something is going to be lower to the horizon > than it actually is. I'm asking this specifically for photographic > purposes, otherwise it wouldn't really matter I guess.
Your fist is about 10 degrees wide when you hold your arm straight out. That will give you some idea about angles. You already should have the angular field of view of your camera lenses in the instruction manuals. Otherwise, for a 35 mm frame the horizontal width of the field in degrees is roughly 2060 divided by the focal length of the lens in mm and the vertical height of the field is roughly 1380 divided by the focal length of the lens in mm. For digital cameras multiply the focal length by the crop factor first. Bud
