>Ansel Adams (aka God) says, "A "normal" lens is defined as one whose focal >lens is about equal to the diagonal of the film format.
The similarity between lens focal length & diagonal is mere coincidence. The true measure of a "normal" focal length lens is one where the image in the viewfinder is the same "size" as the image seen without a camera. Test by holding a camera such that you can see through it with one eye, and see past it with the other eye. Alternately close one eye then the other. Your lens is "normal" if the two views are the same size. If the view through the camera is smaller, you have a "wide angle" lens. If the view through the camera is bigger, you have a "telephoto" lens. Try it. Tim Wheeler ps. Ansel Adams described the zone system, but he kept one zone a secret that only he could reproduce. =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
