----- Original Message ----- From: "Steve Jolly" Subject: Re: DA14mm - why so large and heavy?
> > It's easy to explain. Ninety-nine times out of a hundred, you select a > lens with a particular focal length for a particular photo because it > provides the angle of view you want for that shot. But lenses aren't > identified in terms of angle of view, they're identified in terms of > focal length. This leads to people measuring angle of view in > millimetres, which is actually perfectly reasonable, as long as everyone > understands that they're referring to the equivalent AOV that would be > obtained by using a lens of that focal length on a camera with a > 35mm-size sensor. I refer everything back to 6x7, since it is in the middle of the size range of formats that I use. Therefore, depending on what format I am shooting, I gues a 75mm lens could be a 24mm lens, or a 35mm lens, or a 75mm lens or a 105mm lens. Am I making sense? I hope not. This kind of thinking is muddled, and will lead the photographer who thinks this way to running in circles of confusion William Robb
