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New ISO 12233 Chart for the new Sigma 50-500 mm APO DG OS HSM Lens?
The ISO 12233 charts provide a good objective evaluation of optical quality of lenses. I am interested in the new version of Sigma 50-500 mm and would like to compare its optical quality with similar zooms from other brands. I wonder if there is any plan to redo the tests for the new Sigma 50-500 mm?
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