IT it worth mentioning that this lens once had a bi-radial element, in order to minimize spherical aberration. I am not certain whether all their 90mms had this. It should be easy to find by looking closely.
p.
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IT it worth mentioning that this lens once had a bi-radial element, in order to minimize spherical aberration. I am not certain whether all their 90mms had this. It should be easy to find by looking closely.
p.
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