Here's a forwarded reply from Gary Reese to my earlier post:
--------------------------------------------------
Moose:
To you since I can't easily post it. Feel free to share.
<< It's interesting to speculate what kind of project would only or best work
with the 50/2. >>
Biology fieldwork where you already have a load of other equipment and you
need to shoot handheld landscapes under forest canopies at the same time you
have lots of macro subjects to shoot. Basically, the 50mm f/2 is a good
choice where weight is paramount, you love using a 50mm, you need to shoot
macro and you need lens speed for general subjects.
Copywork on Kodak LPD4, a very slow B&W slide film which doesn't require
reversal processing to get a tranny. The 50mm f/2 allowed, if I recall right,
4 sec. exposures at f/4, something that a 50mm f/3.5 whould have needed 16
sec. at f/8 (for equal image quality). Saving 12 sec. per exposure really
added up when factored over a 150+ copy job, esp. given limited office hours
in the government archives where I found my material to copy. Also, image
manually timing each of those exposures! Your mind wanders counting down 16
seconds.
Copy work generally requires the 50mm macro when the document is standard
Letter size or somewhat bigger.
Gary Reese
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