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Photodo stats
1102 lenses 428 MTF tests 74 in-depth photodo reviews 100+ users join each day Help the lens community by reviewing or rating a lens today via our lens search | Canon EF 28-70mm f/2.8 L USM MTF dataHaving trouble understanding these graphs? Read a guide to understanding them here. Photodo MTF score: 3.9 Effective focal length: 29 - 67 Weighted MTF for 28 mm: f2.8 0.77. f8 0.81 Weighted MTF for 40 mm: f2.8 0.75. f4 0.81. f8 0.83 Weighted MTF for 70 mm: f2.8 0.70. f4 0.77. f8 0.81 Average Weighted MTF: 0.81 Grade: 3.9 Weighted MTF 10 lp/mm: 0.90 Weighted MTF 20 lp/mm: 0.76 Weighted MTF 40 lp/mm: 0.53 Distortion: -2.15% - 2.14% 
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