Archived posting to the Leica Users Group, 1998/03/03
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]From what Jim Brick just wrote ----- there is a profound thought just lying there, only waiting to be expounded upon. - ------------------------------ When looking through a reflex camera, you are looking closely at a magnified ground glass image whereas you are seeing an aerial image when looking through a "M". If you are far-sighted, the aerial image will be sharp and the ground glass not --- and visa-versa through the "R". Added to this is the fact that most Japanese reflex cameras come with a built-in one minus (-1) correction that helps nearsighted users and this might account for some of the preferential bias's in regards to cameras. Maybe Dr. Clompus can help explain why the Japanese tend to design their system biased for the near-sighted. As our bodies get older, the eyeball loses some of its flexibility in rapidly focusing from near to far -- & when you are looking down a gun barrel at the front sight, the eye has to quickly change focus back & forth between sights & object sighted. Marvin Moss Guns, Cameras & Sex Emeritus ====================================================== In a message dated 98-03-03 23:19:53 EST, Jim wrote: << For an R camera, where you are looking at a ground glass screen, I believe a +2 would be great. But on an M camera, this won't work. I use +2 on my R cameras. A +2 is totally wrong for my M6. I'm going to try a +.5 when it comes in. On the M, it may be trial & error. Jim >>