Edge distortion

The rate of edge distortion were evaluated on 50mm standard lenses and zoom lenses by shooting a rectangular shape with 3:2 aspect ratio testing 30 objects in total.

All the fixed focal length lenses had barrel shape distortion and zoom lenses did string reel spindle shape contortion.

Excellent results were Tokina SZ-X 60~300mm/f4.0~5.6, RMC Tokina 35~105mm/f3.5~4.5 2nd Edition, MD Zoom Rokkor 50~135mm/f3.5, Tokina SD 28~70mm/f3.5~4.5 and Leica R Macro Elmarit 60mm/f2.8.

As a matter for regret, worst were expected Minolta MD Zoom 35~135mm/f3.5~4.5 and similar shaped MD Zoom 35~105mm/f3.5~4.5, though color reproduction, sharpness and resolution are favorable, may be the limit of tolerance in spindle warp.

Unexpectedly, recently obtained Fujinon Zoom 43~75mm/f3.5~4.5 got the higher score.