Canon EF 24-105 mm f/4L IS II USM
6. Distortion
More distinct problems are visible on full frame where, at the widest angle of view, the deformations reach −3.97%. They become zero right before 35 mm and then they change the sign, at 35 mm reaching an imperceptible level of +0.35%. Then the value of pincushion distortion increases swiftly, at 50 mm getting at +1.58%, and at 70 mm to +1.70%. Practically the same value (+1.69%) we measured at 85 mm; at 105 mm the distortion decreased slightly to +1.58%.
In this category again the new Canon fares better than its rivals. The distortion level of the cheaper Canon 24-105 mm STM, even if it was helped by the moustache variety, still reached −4.31%. The Sigma 24-105 mm OS was weaker than the Canon tested here on both ends of range of focal lengths.
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Canon 50D, 24 mm | |||
Canon 50D, 35 mm | |||
Canon 50D, 50 mm | |||
Canon 50D, 70 mm | |||
Canon 50D, 85 mm | |||
Canon 50D, 105 mm | |||
Canon 5D Mk III, 24 mm | |||
Canon 5D Mk III, 35 mm | |||
Canon 5D Mk III, 50 mm | |||
Canon 5D Mk III, 70 mm | |||
Canon 5D Mk III, 85 mm | |||
Canon 5D Mk III, 105 mm | |||