: I was looking through some old literature that I have from 1974 and I
: noticed a version of the 135/4.5 Macro that I hadn't noticed before. If
: you look on this page:
: http://www.skipwilliams.com/albums/om-lit/pages/Zuikos-1974.htm. You'll
: see the unusual lens with the wide ribbed focusing ring. I guess that it's
: mounted on a 25mm extension tube or something, since the Auto-tube wasn't
: invented yet.
This prototype also appears in Pangerl's The World Of OM Systems where it's
mounted on the Tilt-Shift Auto Bellows prototype (also never marketed). The
135/4.5 prototype had a smallest aperture of F22.
http://members.nbci.com/_XMCM/veluwen/om-sif/macrophotogroup.htm
hnz
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