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Thanks for that chart. Just in case anyone wishes to compare various lenses for sharpness (resolution of fine detail) I would suggest you do a Google search and download one called "USAF1951.pdf" and print it out. I chose to print it out on high quality, non-glossy, photo paper. I then mount it on a vertical surface, with the camera on tripod and back the camera up until the chart fills the screen of the viewfinder, and do this on all my lenses. I learned quickly which are the better and which are the poorer lenses in my collection.
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