Sony's near flawless Eye AF works perfectly with this lens, quickly locking onto and tracking the subject's eye despite the wide-angle view, and it fully supports Sony's DMF and AF+MF shooting modes. Alternatively, this customizable button can be re-configured to control other key camera settings. This lens has an Auto Focus Lock (AFL) button on the side which as its name suggests can be held down with your left thumb to lock the lens at the current focus point. We didn't experience very much "hunting", either in good or bad light, with the lens accurately focusing almost all of the time. When it comes to auto-focusing, it proved to be a quick performer on the Sony A7R IV camera that we tested it with, certainly as responsive as the Sony FE 35mm F1.4 lens. The Sigma 35mm F1.4 DG DN lens utilises a stepping motor which produces silent and smooth focusing, making it well-suited to shooting both stills and video, with the overall lens length remaining constant during focusing. Polariser users should be pleased that the 67mm filter thread doesn't rotate on focus. There are no hard stops at either end of the range, making it a little more difficult to set focus at infinity. Manual focusing is possible by using the focus mode switch to toggle between AF and MF. The Sigma 35mm F1.4 DG DN lens has a very generously sized, ridged motor-assisted focus ring that is nicely damped. The lens doesn't feature built-in optical image stabilisation, relying instead on the camera body's stabilisation system. The Sigma 35mm F1.4 DG DN lens has a metal lens mount and it accepts 67mm filters via metal threads on the front of the lens. It incorporates a brass bayonet mount that's supposedly more durable than a normal metal mount.Ī rubber seal is incorporated into the lens mount's design to make it dust- and splash-resistant. It measures 75.5mm × 109.5mm, making it a little longer than the Sony FE 35mm F1.8, which measures 76 x 96mm.īuild quality is simply superb, far exceeding what you might expect from such a keenly priced lens. Even with the supplied hood attached, it is still fairly discrete for such a fast 35mm lens. Its overall size is well-suited to a camera like the Sony A7R IV that we tested it with, as shown in the product photos. It is a lot, lot cheaper than its main Sony rival, though, to the tune of around £750 in the UK and $500 in the US. The Sony lens similarly uses a hybrid metal and engineering plastic bodied construction. It's a little heavier than the comparable Sony FE 35mm F1.4, though, which at 524g is 106g lighter than this new Sigma alternative. Weighing in at 640g, the aluminium and Thermally Stable Composite (TSC) bodied Sigma 35mm F1.4 DG DN is relatively light for such a fast, premium full-frame lens. The Sigma 35mm F1.4 DG DN lens is available now priced at £749 / $899 in the UK and USA, respectively. There is a stepping motor for fast, quiet and precise auto-focusing, while the focusing ring provides fine manual focus control.Ī traditional aperture ring runs from f/1.4 to f/16 in third-stop increments with an Auto setting also available for camera-based aperture selection. It has a rounded 11-blade diaphragm which creates an attractive blur to out-of-focus areas of the image and an internal focusing mechanism which means the lens barrel doesn't move. This lens boasts a dust- and splash-proof structure and has a minimum focusing distance of 30cm with a maximum magnification of 0.19x. There's a Super Multi-Layer Coating to minimize internal reflections so that flare and ghosting do not occur and a water and oil repellent coating on the front element. It features 15 elements in 11 groups, with two Special Low Dispersion (SLD) elements, an Extraordinary Low Dispersion (ELD) element, an ‘F’ Low Dispersion (FLD) element and two aspherical elements. It's also available for Leica / Panasonic / Sigma L-mount cameras. The Sigma 35mm F1.4 DG DN is a fast, moderate wide-angle prime lens for Sony Alpha full-frame and APS-C E-mount mirrorless cameras, where it provides a 52.5mm equivalent focal length.
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