Archived posting to the Leica Users Group, 2011/07/09
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]On Sat, 09 Jul 2011 Mark Rabiner <mark at rabinergroup.com> wrote: >My macro lens I have right here is my 55 3.5 Nikkor and it focuses to 9.5 >inches where it gets half sized or "2" you can read on the barrel. >Also I remember having ways to deal with light loss from macro shooting and >I forget the details I think at 1:1 you'd loose two stops and 1:2 you'd >loose one stop. I may have forgotten this. I had a cardboard wheel and >other >gizmos and a trick I used ot use. But I think it was at 3 feet where you >didn't have any light loss any more that you'd have to allow for exposure >wise. This defining I'm sure in many photographers eyes what the limits of >macro was. Macro was where you had to allow for in effect bellows factor. ====================================================================================================== Remember the early Micro-Nikkors that had the compensating diaphragm? At anything smaller than f/4, it automatically opened up to mitigate the exposure difference needed by increasing magnification. We have two at the office that got years of use on the copy stand when we did a lot of slides from books for Art History and other departments. It was so convenient to use the same exposure for all sizes of originals (since the lights were always the same intensity). These compensator lenses had the metal, knurled focus ring, as opposed to the later rubber-clad versions. One of the sharpest lenses I've ever used was my 50mm f/4 Pre-Set Takumar macro that went all the way to 1:1 without extra tubes. I shot H&W Control Film and Tech Pan with it, and used it on my Beseler 23C for years to make enlargments. I'd still be using this lens if I hadn't sold it to my brother with all my Pentax equipment when I switched to Olympus in 1982. Alan Alan Magayne-Roshak, Senior Photographer UPAA POY 1978 University Information Technology Services University of Wisconsin-Milwaukee amr3 at uwm.edu http://gallery.leica-users.org/v/Alan+Magayne-Roshak/