Archived posting to the Leica Users Group, 2000/08/29
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]What you see on the ground glass of an SLR, as long as you push or hold the preview button or lever (looking at the GG while at shooting aperture) is exactly what you will get on film. If you do not view "stopped down", well... you are looking at the GG while the lens is wide open but photographing at a stopped down aperture. Which would explain why what you see is NOT what you get. DOF preview is intended for just that. Checking DOF and making sure what you want in focus IS in focus and what you want out of focus IS out of focus. It works. I've been using it on 35mm SLR's and view cameras since 1959 and on Hasselblads since 1962. This is how these cameras work. What can I say. The professional photographic industry is based on this fact and principal. Used properly, WYSIWYG. Exactly. Jim At 10:40 AM 8/29/00 -0400, you wrote: >In a message dated 8/28/00 11:45:06 PM Eastern Daylight Time, >apbbeijing@yahoo.com writes: > ><< These are conditions best judged in a reflex finder in the first > place >> > >I have used SLR's for decades, and I have never seen a precise corollation >between depth of field as it appears on a focusing screen and what appears on >the film. It is at best an approximation. As to the specific appearance of >out of focus areas, with the possible exception of such brutally obvious >phenomena as mirror lens "doughnuts" and blinding flare, I have seen little >or no visual connection. >Have I been overlooking the obvious all these years, or does the writer see >something unmeasurable, not quite definable but definitely present on the >focusing screen that is not appreciated by the undersigned? > >Joe Sobel