Sigma 85mm f/1.4 DG DN Art

Sigma's 85mm Art has a history. The 2016 DSLR version was a monster — optically brilliant, and heavy enough that you felt it by the end of a shoot. The DG DN, announced in August 2020, is the redesign for mirrorless: same f/1.4, same Art badge, 630g instead of 1,130g.

That number is the story of this lens. It's 200g lighter and 11mm shorter than Sony's own 85mm f/1.4 GM, and it costs about a third less. For anyone who shoots portraits on location — walking between spots, holding the camera up for an hour — that's not a spec-sheet detail. That's whether the lens comes with you.

What Sigma actually did

Fifteen elements in eleven groups, with five SLD elements and one aspherical. Eleven rounded aperture blades, which matters more for out-of-focus rendering than the element count does. Internal focus driven by a stepping motor, so nothing extends and the front doesn't rotate.

The controls are the part worth noticing. You get a physical aperture ring, which can be de-clicked for video, plus an iris lock so it can't drift mid-shoot. There's an assignable AFL button and an AF/MF switch. The barrel is aluminium and thermally stable composite, dust- and splash-resistant, with a water- and oil-repellent coating on the front element.

Minimum focus is 85cm for 0.12x magnification. That's ordinary for the class — this is not a lens you use for detail shots of rings or hands. Filters are 77mm.

The flaw everyone finds

Every review of this lens lands on the same thing, so it belongs near the top rather than buried: pincushion distortion, and quite a lot of it.

For portraits it's mostly academic — faces don't have straight lines, and the profile correction handles it. It becomes real the moment you put architecture, a doorframe, or a horizon near the edge of the frame. If your 85mm work involves environmental portraits against buildings, this is the thing to test before you commit.

Two more honest limitations. There's no optical stabilisation, so on an unstabilised body you're carrying the shutter speed yourself. And vignetting is strong wide open — roughly 2.2 stops at f/1.4, easing off as you stop down and effectively gone by f/8. Whether that's a cost or a feature depends on whether you were going to add the vignette back in Lightroom anyway.

Colour fringing follows the same pattern as most fast non-APO glass: visible on high-contrast edges at f/1.4 and f/2, largely cleared up by f/4.

In the field

The specs are only half the story. Here's how it actually behaves once it's on the camera.

Handling

For an f/1.4, it's surprisingly small — I keep expecting it to feel like the old DSLR Art and it never does. In the hand it feels genuinely premium, and it balances well enough that an hour of shooting doesn't wear on you.

Autofocus in the field

On an older body in low light it hunts a little. That's the honest limitation — but once you know it's coming, working around it becomes second nature, and it's never cost me a frame that mattered. On a newer body it simply works: quick, quiet, locked on the eye.

Rendering

The rendering is beautiful, and it's the reason this lens stays on my camera. The bokeh can look a touch busy in certain backgrounds — dappled light through leaves, mostly — but in real shooting situations you don't notice it, and bokeh is subjective anyway.

Who it's for

Any photographer who wants to deliver premium-quality portraits should seriously consider it. In real shooting situations you won't find a meaningful difference between this and the G Master — you'll just have more money left over and a lighter bag.

Verdict

This is my all-time favourite portrait lens. If the space allows it, this is what goes on the camera — the flaws are real but easy to live with, and everything that matters for a portrait, it does beautifully.