"Sharpness" is a bastardized term and doesn't have a specific agreed upon meaning. Thus, I've written several articles about the subject to help you understand the topic in which "sharpness" falls:
Supporting the Nikon F-mount on the Internet since 1994...
Added Canon EF mount support in 2017...
"Sharpness" is a bastardized term and doesn't have a specific agreed upon meaning. Thus, I've written several articles about the subject to help you understand the topic in which "sharpness" falls: