Originally Posted by
Joerg Krusche
Bob,
the f=14 versions are definitely 4-element artar-type .. the CL f=16 1000/1200mm versions are 6-element .. the 6-element versions build "almost" twice as long .. the f=16 versions did cost quite a bit more than the 4-element cousins and do offer higher performance as can be seen by their MTF-curves.. higher resolution of the 6-element lens with fine structures .. as commented by a Rodenstock guy they were individually assembled with paired lens elements on an optical bench .. at the expense of higher cost and weight..all of this is history for quite some time now..whatever you shoot both f=14 and f=16 do offer significant performance .. and can be had for a fraction of their selling price 15 years ago .. ,
joerg
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