Archived posting to the Leica Users Group, 1997/08/12
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Alf Breul wrote: >The angle, which allows the human eye to focus an object as __sharp__ agrees >to the angle of the usual standard lens, which is generally defined by the >angle, neither by the diagonale of some format or the focal length or >anything else, like peripheral view. Besides, it would be rather suspect to >imagine the visual input based on a rectangle or square. Still, the >perspective of the human perception agrees to the transformation which is >given by the 90 mm in 35 mm format. As I mentioned yesterday in a post, the angle that can be sharply resolved is _much_ less than what a 90 or 135mm lens takes in on a 35mm camera. Any field larger than a degree or two is scanned by the eye, if detail and sharpness is required. How far we let our peripheral vision include the surroundings often depends on the subject, and is certainly not a fixed amount. There is no 'standard' focal length except that defined by someone who likes such things defined. Don't take someone else's definition; find your own. * Henning J. Wulff /|\ Wulff Photography & Design /###\ henningw@archiphoto.com |[ ]| http://www.archiphoto.com