Archived posting to the Leica Users Group, 2002/04/21

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Subject: Re: [Leica] Elpro and 180/4
From: Doug Herr <telyt@earthlink.net>
Date: Sun, 21 Apr 2002 21:37:18 -0700

on 4/20/02 6:02 AM, Aram Langhans at langhans@yakima-wa.com wrote:

> Many of you told me that the 180/4 is a good candidate for an Elpro.  Which
> one(s) should I get?  Which one will take off where the lenses close focus
> point is and get me even closer w/o much overlap?  Ane w/o much loss in
> quality.
> 
 
I did a crude test of the ELPRO lenses on the 180mm f/4.0 Elmar-R this
weekend, by focussing on a plastic ruler with the ELPRO lenses attached.
The flaws in this test include the non-100% viewfinder of the SL but for a
first approximation it will do.  I used earlier Series VII ELPRO lenses with
a cheap adapter from a swap meet junk bin to fit the ELPRO on the E55 lens.
 
The ELPRO VIIb (ELPRO 4 in E55-ese) with the lens at infinity gives an
object field about equal to that of the 180mm lens alone at the minium focus
distance (longer than the plastic ruler, however).  With the same ELPRO and
the 180 at its minimum focus distance, the long side of the viewfinder
showed ~120mm of ruler.
 
The ELPRO VIIa (a.k.a. ELRPO 3) on the 180 with the 180 at infinity showed
about 120mm of ruler in the viewfinder, and just over 70mm in the viewfinder
at the minimum focus distance.
 
Preliminary conclusion: ELPRO 3 & 4 with the 180mm Elmar-R will provide a
wide range of close-up options with minimal gaps or overlaps to something
approaching 1:2 reproduction ratio.  Sounds handy.  No image quality data
yet.
 
Doug Herr
Birdman of Sacramento
http://www.wildlightphoto.com


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