I am planning to buy a 210mm lens for my 4X5 system which I use for both portaits and landscapes. I want the sharpest possible lens; coverage is not an issue.
The usual opinions on this topic usually go something like this: the newer models (APO-Symmar-L and Sironar-S) are much sharper than the older, cheaper designs (Symmar-S or Caltar/Sironar-N) but it's on paper only. Supposedly you can't see the difference with the naked eye.
So why do people buy the newer models? Is it kind of like when the doctor says, "It's all in your head"?
Or is there really an appreciable difference in sharpness?
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