Sigma introduced the 105mm F2.8 EX DG OS HSM Macro in 2011, and when the price dropped by nearly $400 last month, you knew the next generation was waiting in the wings. In fact, all but one of Sigma's Macro lenses have dropped in price, so it might be a good time to scoop one up.
Available in L-mount or E-mount, the new Sigma 105mm F2.8 DG DN Macro takes its place in the Art series, offering the same full-frame coverage but with improved optics designed for mirrorless cameras. For the uninitiated, DG denotes full-frame and DN stands for mirrorless.
Optically, 17 elements are packed into 12 groups including a spherical low dispersion element (SLD) which reduces chromatic aberration, a phenomenon where the colors in the image come into focus differently along the edge. The rounded 9-blade aperture design is going to provide a pleasing bokeh similar to other Art lenses, and the F2.8 is fast enough for low light conditions when shooting video, especially when paired with the a7S III.
Credit: SigmaOn the lens barrel is a de-click aperture button along with a user-assignable AFL button, and focus limiter settings. You can also lock the aperture with the ring lock switch. Sigma says the lens is compatible with autofocus systems and lens-based corrections depending on the camera model. Autofocus is powered by a Hyper Sonic Motor, a ring-type motor that's similar to Canon's USM and Nikon's SWM technology making it quiet enough for video.
With a 1:1 magnification ratio, you can get some interesting b-roll shots if you have a steady hand and the patience for it as macro lenses make for a great option when shooting product videos or if you need a punchy close-up.
When shooting L-mount, the lens has a minimum focusing distance of 11.6 inches (29.5cm) and a filter size of 62mm. As you might expect, the lens has water and oil repellent coatings and a dust and splash-proof design. The L-mount option weighs 715g (25.2oz) which is pretty comparable to others on the market.
The Sigma 105mm F2.8 DG DN Macro will start shipping in October for $799.