Archived posting to the Leica Users Group, 2006/09/01

[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]

Subject: [Leica] M42x1-Canon EOS adapter with electronic focus confirmation
From: grduprey at mchsi.com (grduprey@mchsi.com)
Date: Fri Sep 1 22:59:12 2006

Actually, I do not consider the Nikon FM finder particularly good or bright. 
 The F3 HP finder is pretty good, but not up to the standard of the R8/9 or 
the SL.

Gene


-------------- Original message from Scott McLoughlin 
<scott@adrenaline.com>: -------------- 


> OK, so I give up. Why is it so hard to make a nice SLR VF? 
> 
> I have read that a 100% coverage finder requires stricter 
> tolerances, hence more cost. Dunno if that's true or not, but it 
> sounds plausible. 
> 
> So what about a a nice ~93% coverage , but otherwise spiffy 
> VF like in the Nikon FM series? Why aren't all SLR viewfinders 
> at least that good? 
> 
> What are the engineering challenges? or the costs? 
> 
> Scott 
> 
> Douglas Herr wrote: 
> 
> > 
> > On Aug 30, 2006, at 12:43 AM, Scott McLoughlin wrote: 
> > 
> >> OTOH, whence the need for the "green light" vs. ground glass 
> >> focus confirmation? 
> >> 
> >> Are we back to the discussion of 2 days ago on compromises 
> >> we'll now accept with SLR viewfinders? 
> > 
> > 
> > 
> >>>>> http://tinyurl.com/qzpgm 
> >>>> 
> > 
> > Yup, same discussion. The EOS focus confirmation seems to have 
> > problems with the same situations where the human eye has problems: 
> > slow lenses (f/8 or smaller), ultra-wide lenses (i.e., large DOF). 
> > The advantages of the electronic system are that it works when an 
> > arctic gale is making your eyes water too much to see clearly, and 
> > that when your focus is off you can blame the camera instead of 
> > yourself. 
> > 
> > BTW, with the 1.4x APO-Extender on the 560mm f/6.8, an effective 
> > aperture of f/9.5, beyond the EOS system's reliable range, focus with 
> > the SL is quick and certain. 
> > 
> > Doug Herr 
> > Birdman of Sacramento 
> > http://www.wildlightphoto.com 
> > 
> > 
> > _______________________________________________ 
> > Leica Users Group. 
> > See http://leica-users.org/mailman/listinfo/lug for more information 
> 
> 
> -- 
> Pics @ http://www.adrenaline.com/snaps 
> Leica M6TTL, Bessa R, Nikon FM3a, Nikon D70, Rollei AFM35 
> (Jihad Sigint NSA FBI Patriot Act) 
> 
> 
> 
> _______________________________________________ 
> Leica Users Group. 
> See http://leica-users.org/mailman/listinfo/lug for more information 

Replies: Reply from hoppyman at bigpond.net.au (G Hopkinson) ([Leica] M42x1-Canon EOS adapter with electronic focus confirmation)
Reply from jbcollier at shaw.ca (John Collier) ([Leica] M42x1-Canon EOS adapter with electronic focus confirmation)