Sony's Most Beloved 55mm Gets a Serious Challenge From Viltrox

Choosing between a $370 lens and a $1,100 lens is easy when the cheaper one wins on almost every technical measure. The Viltrox AF 55mm f/1.8 Evo is a direct challenge to the Sony Zeiss 55mm f/1.8 ZA, and Dustin Abbott's side-by-side test on the Sony a7R VI makes that case in detail.

Coming to you from Dustin Abbott, this thorough comparison pits two 55mm f/1.8 lenses against each other across build, autofocus, video, and optical performance. Abbott scores each category and arrives at a final point tally: 14 for the Viltrox Evo, six for the Sony Zeiss. The Viltrox costs roughly a third of the Sony's $1,100 MSRP, weighs 385 g versus 281 g, and adds features the Sony simply doesn't have, including a clickable aperture ring, an AF/MF switch, and a function button. The Sony is more compact and lighter, but the Viltrox's extra weight comes with a more complete physical feature set that matters if you shoot video or manual focus work.

On autofocus, the result is closer than you might expect. Abbott found both lenses perform at roughly the same speed, indoors and out. The Sony Zeiss is noticeably quieter during operation, which earns it a point in both the autofocus and video sections. The Viltrox, however, shows less focus breathing and delivers a far better manual focus experience with a longer, more controllable focus throw. Abbott also notes an audible clicking sound from the Viltrox during focus pulls when the camera mic is running hot, something that didn't appear with the Sony Zeiss in the same test conditions.

Where things get decisive is optical performance. Abbott tested both on the 67-megapixel sensor in the a7R VI, and the Viltrox is sharper across the frame at every aperture he tested: wide open, at f/2.8, and at f/5.6. The Sony Zeiss never quite catches up, particularly toward the corners. Contrast tells a similar story. The Viltrox uses an apochromatic-style design, and that difference is visible from close focus out to near-infinity distances. Chromatic aberration is another area where the Sony Zeiss falls short, with persistent green fringing on specular highlights that simply isn't present on the Viltrox. Abbott did give the Sony Zeiss credit in a couple of areas: vignetting is better controlled, and in a blind bokeh test, he found himself picking Sony Zeiss renders about 60 percent of the time when comparing overall image rendering. That said, the bokeh balls themselves favor the Viltrox once you look closely at the concentric rings and fringing the Zeiss produces.

Abbott's conclusion is measured. He came away from this second look at the Sony Zeiss with more appreciation for it than his first review years ago. It's compact, focuses quietly and accurately, and has a rendering quality that holds up if you're not pushing it for contrast. But he's direct: if you're buying new, he can't recommend the Sony Zeiss over the Viltrox at three times the price. He'd sooner put the extra money toward the Sony FE 50mm f/1.4 G Master, the lens he shot the video with. Check out the video above for the full breakdown and optical comparisons from Abbott.