Ok, I have a question about minus aspherics:
1. I assume that the primary purpose for aspherizing SV minus lenses is for edge thickness reduction, and not to compensate for a flattening effect, as with plus lenses.
2. This takes the lens off "corrected curve" at the periphery, I assume(although I realize corrected curve and stock semifinished lenses is a rather rough optimization at best).
3. Therefore, are peripheral optics actually worse than non-aspherics?
Muchas gracias.
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