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Old 02-04-2019   #11
Think Different
Mackinaw is offline
Join Date: Mar 2005
Location: One hour south of the Mackinaw Bridge
Posts: 3,648
My experience? Aspherical surface usually means a sharper, more contrasty image wide-open, especially with a high-speed lens. Comparing an ancient Canon FD 55/1.2mm with a FD 55/1.2 aspherical wide-open, the difference is dramatic, with the aspherical being much better. Of course many will argue that the signature of the non-aspheric is better. But that’s a personal choice.

Jim B.
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