The Sony 50mm f1.2 GM is a full-frame E-mount lens with an f1.2 maximum aperture. The Zeiss 50mm f1.4 is also a full-frame E-mount lens with an f1.4 maximum aperture. Both lenses are designed for shallow depth of field and low-light performance, but one is significantly more expensive than the other.

In the video below, I take a real-world approach to comparing the Sony 50mm f1.2 GM with the Zeiss 50mm f1.4, focusing on how they perform in an actual portrait session across a range of lighting conditions. From shaded areas to strong backlight, close-up headshots to full-body portraits, I put both lenses through the same scenarios to see how they hold up. I am using these lenses on 2 Sony A7III camera bodies that are set up exactly the same to keep the comparisons fair.

One of the biggest differences I noticed is autofocus performance. While the Zeiss is a great option for portrait sessions and I am able to capture in focus images, the GM’s eye autofocus was noticeably more responsive and consistent. In reviewing the final images, the GM delivered more usable shots with better focus accuracy, especially when working wide open. You’ll be able to see the performance of both lenses by watching the behind the scenes video below.

I also dive into the bokeh and rendering differences between the two. Both lenses are capable of creating a pleasing background blur, but the GM’s f1.2 aperture gives it a softer, creamier falloff—especially noticeable in tight portraits. The skin tones and background separation have a dreamy quality with the GM that the Zeiss doesn’t quite match. That said, the Zeiss still produces beautiful images and holds its own, particularly when stopped down.

Throughout the video, I also talk about how color rendering varies slightly between the two lenses, with the Zeiss leaning cooler and the GM giving off a warmer tone. I share how these differences impact my work and how I think about lens choice based on both technical performance and practical use.

Even though the GM outperforms the Zeiss in several ways, I explain why I’m not making the switch—at least not yet. It comes down to how often I actually use a 50mm lens in my professional work. My main kit for weddings includes a 35mm and 85mm, which I rely on for most of the day. The 50mm is more of a specialty lens in my bag, and for the types of jobs I use it on—like e-commerce shoots at higher apertures—the benefits of f/1.2 aren’t something I need often. So for now, the Zeiss still fits my workflow better.

If you’re trying to decide between these two lenses, or you're simply curious how they perform side by side in the field, this video will give you a clear and honest look. I also talk through my thought process as a working photographer and share why sometimes the best gear decision isn’t always about what’s newest or most high-end, but what fits your needs and shooting style best.

Photos are edited with my Disposable Film Lightroom Preset Pack