Ok, its looking like a Shen Hao 617-A is in my future, now I'm wondering if the lenses I currently own for my 4x5 are going to cut it:
Schneider APO Symmar L 210/5.6
https://www.schneideroptics.com/ecom...D=164&IID=1832
Schneider Super-Symmar XL 80/4.5
https://www.schneideroptics.com/ecom...D=169&IID=1838
Schneider HM 120/5.6
https://www.schneideroptics.com/ecom...D=167&IID=1845
They all say 'ideal for 4x5' but mention they will work on larger formats, what image-circle sizes should I be looking for?
Thanks,
Sam
EDIT: I guess the obvious conclusion is 60x170mm means I need an image circle of at least 180mm so my lenses are 320, 210, 250mm respectively so I guess I'm good at f22 but what about wide open, how do you determine that?
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