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It appears that the lens errors become greater by a factor of 10 with every stop that a lens becomes brighter. Up until f/2.8, that is not much of a problem, but below that, it becomes visible.

May 2014
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Scores (no lens corrections)

RAW score

79

Resolution

70

Distortion

82

Vignet

89

Lat. C.A.

88

Scores (WYSIWYG)

JPG score

72

Resolution

Distortion

77

Vignet

77

Lat. C.A.

82

More

AF speed

Test camera

Canon 650D

Filter size (mm)

72
  • Camera mount
Canon EF
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