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From DPReview:
By verybiglebowski
Photototo
By kuuan
sharpness shootout manual normal lenses
By ProfHankD
The Aggregate: My Lenses
By stevemark
Test: 23 Minolta MC/MD 50mm Lenses on the NEX-5N: Sony Alpha / NEX E-mount (APS-C) Talk Forum: Digital Photography Review
Unknown author
Several 50mm Prime lenses comparison
Unknown author
32 Normal Lenses Test 1977
By verybiglebowski
Photototo
By kuuan
sharpness shootout manual normal lenses
By ProfHankD
The Aggregate: My Lenses
By stevemark
Test: 23 Minolta MC/MD 50mm Lenses on the NEX-5N: Sony Alpha / NEX E-mount (APS-C) Talk Forum: Digital Photography Review
Unknown author
Several 50mm Prime lenses comparison
Unknown author
32 Normal Lenses Test 1977