Archived posting to the Leica Users Group, 2006/08/30
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Doug, I have a late Mk-II original Leicaflex, and it has a VF that's every bit as bright as the best SL/SL2 finders I have seen. Do you know if they share the same design? Other Mk-I and MK-II original Leicaflexes I have seen are not as bright as this one. Best Ed Albesi > El 30/08/2006, a las 14:50, telyt@earthlink.net escribi?: > <snip> > Scott McLoughlin <scott@adrenaline.com> wrote: > >> OK, so I give up. Why is it so hard to make a nice SLR VF? >> > > I'll leave discussion of the viewfinder eyepiece to the > optometrists among > us, but here's what Leitz did with the SL and SL2: > > The mirror is fully-reflective except for the central region, where > the > meter reads the light. The standard screen in the SL has a coarse > microprism in the central area and a very fine microprism over the > balance > of the screen. The fine microprism is small enough that you can't > recognize it as microprisms, it focusses like ground glass yet > transmits > light like microprisms. The microprisms preclude the use of etched > fresnel > rings so instead the pentaprism has a condensing lens ground into the > bottom. And of course the prism is big to provide good viewing out > to the > corners. > <snip> > Doug Herr > Birdman of Sacramento > http://www.wildlightphoto.com