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2024-03-19 04:48:49
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Sigma 35mm f/1.4 DG HSM: Lens Skew

In DAP in my review of the Sigma 35mm f/1.4 DG HSM A1 I show and discuss the all too common issue of a sharpness asymmetry which I call “lens skew”.

Lens skew with the Sigma 35mm f/1.4 DG HSM A1.

This discussion really applies to any brand on any camera.

Lens skew is all too common and yet this sample of the Sigma 35/1.4 showed itself to be an outstanding performer on most all other field shots (at least at closer range). But given a ~infinity focus shot with the subject at a uniform distance, lens skew stands out like a sore thumb.

Sigma is not being singled out here, but in this case I was able to produce an unusually instructive case with this otherwise outstanding lens. Regrettably because it is a loaner I am not at liberty to send it to Sigma to see if it deemed “within spec” or not.

Sigma 35/1.4 DG HSM @ f/2 .8

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