Pentax SMC P-FA 20-35mm f/4.0 AL MTF data
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Photodo MTF score: 3.4
Effective focal length: 20 - 34 mm
Weighted MTF for 20 mm: f4 0.72. f8 0.77
Weighted MTF for 28 mm: f4 0.73. f8 0.78
Weighted MTF for 35 mm: f4 0.76. f8 0.78
Average Weighted MTF: 0.76 Grade: 3.4
Weighted MTF 10 lp/mm: 0.84
Weighted MTF 20 lp/mm: 0.72
Weighted MTF 40 lp/mm: 0.52
Max distortion: -4.74% - -0.71%
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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