The Sigma 35mm ƒ/1.4 DG HSM provides a very good level of resistance to chromatic aberration, and it's fairly constant across the range of apertures (if you see it, you'll see it in the corners in areas of high contrast).Įven more noteworthy is a low amount of longitudinal chromatic aberration, which is typical of very fast lenses (ie., ƒ/1.4 or faster). Mounted on the subframe Canon 7D, performance for sharpness is very similar, perhaps a bit more forgiving at the ƒ/1.4 setting. This performance continues through to ƒ/8, and diffraction limiting begins to set in at ƒ/11, but you don't see the impact of this until ƒ/16, where a generalized softness begins to descend upon the image. Stopping down to just ƒ/2 everything gets a little sharper, but corner softness isn't really addressed you have to stop down to ƒ/2.8 for that, where the corners are tamed enough that the lens is offering practically tack-sharp performance from corner to corner. For isolating a subject this is actually quite good, but if you want corner to corner sharpness you will need to stop down significantly. ![]() Mounted on the full-frame Canon 1Ds mkIII, the lens produces images with a sharp center but significantly soft corners when used wide open at ƒ/1.4. The Sigma 35mm ƒ/1.4 DG HSM produces surprisingly sharp results, even when used at its wider apertures, though it must be stopped down slightly for maximal sharpness. Weather-resistant construction with a brass bayonet that affords improved mounting accuracy and rigidity.The Sigma 35mm ƒ/1.4 DG HSM takes 67mm filters, ships with a petal-shaped lens hood and is available now for around $900.Rounded eleven-blade diaphragm contributes to a smooth and pleasing bokeh quality.Built-in Autofocus-Lock (AFL) button which can be assigned additional functions widens the range of operations available on the lens.Additionally, a dedicated aperture ring lock switch can also be employed to prevent accidental shifting of the aperture setting. Manual aperture ring can be de-clicked for smooth, silent aperture switching to benefit video applications.Integrated stepping motor realizes quick and quiet autofocus, which is further complemented by an optimized AF algorithm to produce smoother focusing performance.A Super Multi-Layer Coating has been applied to lens elements in order to minimize lens flare and ghosting and contribute to producing contrast-rich and color-neutral imagery, even in backlit conditions.Bright f/1.4 maximum aperture is particularly well-suited for working in available light conditions and provides extensive control over depth of field for isolating subject matter with selective focus.Wide-angle lens is designed for full-frame Sony E-mount mirrorless cameras but can also be used with APS-C models where it provides a 52.5mm equivalent focal length. ![]()
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