Canon

http://sigma-rumors.com/2015/07/sigma-24-35mm-f2-art-mtf-charts-distortion-vignetting/

높을수록 좋은 것입니다.MTF 차트 외에도 왜곡과 비네팅 자료도 있습니다.

Diffraction MTF Charts

Geometrical MTF Charts

Distortion

Vignetting

MTF versus 24mm f/1.4 Art and 35mm f/1.4 Art

Be aware that this is wide open performance, so the 24-35mm Art is at f/2 and the two prime lenses are at f/1.4. Regrettably, Sigma doesn’t provide MTF charts for stopped down apertures.

Moreover, the diffraction MTF chart for the 35mm f/1.4 Art is not available, so what you see below is the “geometrical” one, that shows very slightly higher (better) values.

Sigma 24-35mm f/2 DG HSM Art at 24mm (left) and 35mm (right) — f/2

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