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Sigma 35/1.4 DG HSM for Canon
Sigma 35/1.4 DG HSM for Canon

Compared vs Canon 35mm f/1.4L (Dolls, Canon 5D Mark III)

Shot with Canon 5D Mark III.

This comparison was exacting. A nodal slider (camera mounted on plate that can be moved linearly) was used to match focus to within 1mm at ƒ/1.4; the engraved 1mm marks allow precise focus adjustment (shoot, check, make exact adjustment, focus bracketing in 1mm increments).

Actual focal length being wider-angle for the Canon 35/1.4L, it was moved just a little closer to the scene, but because the nodal slider was used, the “angle of attack” was identical, and not very much different in any case.

The camera was pointed down slightly, so that the nominal plane of focus slices roughly through the top of the color patches down through the central doll’s eyes and through the knee area of the central doll. Depth of field is most certainly involved here, by intention.

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Variation in brightness — Canon auto-lens tweak 
Variation in brightness — Canon auto-lens tweak
Entire frame

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