Pentax SMC-FA Zoom 28-70mm f/4 AL MTF data
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Photodo MTF score: 3.3
Effective focal length: 29 - 67 mm
Weighted MTF for 28 mm: f4 0.69. f8 0.76
Weighted MTF for 40 mm: f4 0.69. f8 0.79
Weighted MTF for 70 mm: f4 0.74. f8 0.80
Average Weighted MTF: 0.75 Grade: 3.3
Weighted MTF 10 lp/mm: 0.85
Weighted MTF 20 lp/mm: 0.70
Weighted MTF 40 lp/mm: 0.44
Distortion: -4.89 to 2.43%
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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