Moose it seems beatr me to the Hawkins CAT lens page--seems only in web archive
now. Perhaps AG should consider preserving it with the other lens tests.
http://web.archive.org/web/20120215095204/http://brashear.phys.appstate.edu/lhawkins/photo/mp-cat-tests.txt
zuiko 500 cat
http://esif.world-traveller.org/om-sif/lensgroup/500mmf8.htm
Sigma 600 mm f/8 mirror
600mm
f8.0 (fixed)
6 elements
multiple-layer coating
6.6 ft (1.7 m) from the focus plane
86mm (front), 22.5mm (rear)
26.6 oz (0.753
Filter size:
86mm (front), 22.5mm (rear)
Weight:
26.6 oz (0.753 kg)
So the Zuiko has a smidge less resolution but higher contrast--contrast can be
easily adjusted in post though of course. Moose re-processed a Sigma 600/ shot
of a ship with Boston in the background. I recall the new version was very
very good. The Zuiko 500 is smaller/lighter. Oh, the Sigma can focus much
closer if that is important. Moose could focus the Sigma on the 5D fine and I
shot a few with it on OM and didn't have too much trouble. My Celestron 750/6
is easier to focus but rather a beast. Mag LV in an EVF should simplify
matters.
Could use a 500/600 CAT to let out of the bag too, Mike
--
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