I tried googling (here and elsewhere) but didn't really come across an answer to my particular question:
Long version: From the two f/4.5 Tessars I have, I know they light up far more than their ~60 degree image circles (of "good sharpness") and are sharp for a good part of the extra bit too, depending on what I do with it. But, everywhere I read on the internet (I also have the LCVM), people make it sound as if a Tessar will chop your hands off if you try to shift/raise a bit more than you should.
Finding out this information about Heliars is even more difficult because people tend to use Heliars (and Universal Heliars) mostly for portraits and not at infinity or much for landscapes. Anyone know what the wide open circle of illumination of a 300mm 4.5 Heliar is (at infinity)?
Short version: When wide-open at f/4.5, how do the circles of illumination compare between the Heliars and Tessars of the same focal length? How big is the circle of illumination of a 300 4.5 Heliar at infinity when wide open?
Thanks in advance.
G
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