Leica SL3-S initial review: the fastest Leica ever, yet strangely familiar

The Leica SL3-S is the company’s fast 24MP full-frame L-mount mirrorless camera, sitting alongside the high-res SL3 and superseding the SL2-S.

Key Specifications

• 24MP BSI CMOS full-frame sensor with on-sensor phase detection
• Up to 30fps shooting
• IP54 weather sealed body
• 96MP Multi-shot high res mode
• 6K full-sensor ‘open gate’ video up to 30p
• Full-width 4K video up to 30p, 60p with APS-C crop
• ProRes 422 HQ internal capture, output to SSD and Raw over HDMI
• ‘Camera-to-cloud’ compatibility with Frame.io collaboration platform
• CAI Content Credentials authenticity metadata

The Leica SL3-S will be available immediately at a recommended price of $5295.

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Index:

• What’s new?
• How it compares
• Body and handling
• Initial impressions
• Specifications
• Press release

What’s new

Speed

Leica describes the SL3-S as its fastest-ever camera, able to shoot at up to 30fps. This can be done with Raw capture (12-bit), including full use of the camera’s subject recognition and tracking autofocus.

In terms of autofocus, the SL3-S gains on-sensor phase detection and the ability to detect people (head/face/eyes) and animals.

In concert with this added speed, the SL3-S’s Wi-Fi has been updated, now offering 2×2 Mimo for parallel connections. This allows transfers at up to eight times the speed offered by the SL2-S, with 40MB/s transfer allowing DNGs to be sent in around half a second.

High Resolution multi-shot

The SL3-S includes a multi-shot high resolution mode. Generally we find these to be of quite limited use (they tend to be fiddly and require absolutely static subjects to gain their full benefit) but, as part of the L² partnership with Panasonic, this is one of the better implementations.

You have the choice of a tripod mode or a handheld mode, which doesn’t have such precise control of sensor movement, so doesn’t give such detailed results. There’s also a choice of how any motion in the scene is dealt with: either by combining shots to give blurred motion or by selecting a single frame to hide any intra-shot movement (but with lower detail in the areas of movement, as a result).

The nature of combining multiple shots gives a noise performance boost and this implementation has the benefit of letting you combine the images in-camera, rather than requiring desktop software.

Video

The SL3-S offers an extensive array of video modes, many of which map very closely to those offered by Panasonic’s S5IIX model. So there’s 6K Open Gate capture at up to 30p or 4K at 60p if you use the APS-C region of the sensor.

Open-gate shooting, which uses the whole sensor region, gives flexibility in the edit, letting you choose different crops from a tall 3:2 area, so you can add some movement to your framing by re-positioning the crop, apply post-shot stabilization, or cut both vertical and horizontal crops out of the same clip, if your target is social media.

Options include internal 5.8K ProRes 422 HQ capture or 4K/60 without record limits to a CFexpress card. Alternatively, 5.9K Raw at up to 30p or 4.1K Raw data from the APS-C region can be output over the HDMI socket for encoding by off-camera recorders. There’s also the ability to capture compressed footage direct to an external SSD using the camera’s USB-C output.

Content Credentials

The SL3-S also becomes one of the first publicly-available cameras to be able to embed ‘Content Credentials,’ the cryptographically-signed metadata authenticating the source of images it produces.

This lets you embed evidence that the image was taken using an SL3-S, in a manner that’s becoming increasingly widely adopted. Popular editing tools such as Photoshop, Lightroom and Photo Mechanic can then add details of any edits they’ve conducted, letting you present a chain-of-custody to prove that no AI elements have been introduced.

The scheme has wide-enough backing across the industry that we’d expect some news services to start demanding content credentials on submitted images, and it’s not impossible to imagine some photo contests going down the same path, if it becomes widely adopted.

Camera-to-cloud

Like recent Fujifilm models and several recent Panasonics, the SL3-S will gain the ability to upload images and footage directly to Adobe’s Frame.io collaborative working platform. Once you’ve given the camera the login details for a Wi-Fi network, it can directly upload to a folder in Frame.io. In recent months, Adobe has been improving the integration between Frame and its other cloud-based applications, meaning images uploaded to Frame can then be ingested into a Lightroom catalogue, for instance.

Leica says this feature will be added during 2025.

Leica Looks

The SL3-S gains the latest ‘Leica Look,’ downloadable using the company’s Fotos app, these include the ‘Brass’ look added in Fotos v.5.0.

The app now allows you to combine looks, with an option for the intensity with which each one is applied.

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How it compares

As usual with Leica, the pricing of its cameras is inherently out-of-step with competing cameras with comparable specs from more quotidian brands. Here, we compare it with the Panasonic Lumix DC S5IIX, simply because they share a sensor, along with a fair number of features and capabilities, thanks to the L² tech-sharing partnership with Panasonic.

We also compare with the Nikon Z6III, which is a comparably fast 24MP full-frame camera. In terms of price, the more expensive Z8 is also relevant, but we’re primarily looking at bodies that offer comparable resolution here.

On paper, the SL3-S looks very expensive, compared to its peers. Part of this is because a specs comparison isn’t very good at capturing some of the things that Leica brings to the table: the SL3-S’s exceptionally solid-feeling build (backed up by an actual, albeit relatively modest, IP rating), and its distinctive, photo-focused user interface. Then, of course, there’s the mythos of the Leica name and the promise of being “handmade in Germany.” Ultimately, along with the exclusivity that the price ensures, that’s one of the things you’re paying for.

Our tables only mark green and red factors that are unarguably beneficial or disadvantageous; it’s up to each individual to decide how important pixel count or brand history are to them.

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Body and handling

The SL3-S has essentially the same body as the original SL3: an impressively imposing and solid-feeling lump of metal. It’s an unusually large camera by modern standards and one that’s hard to miss, despite its distinctly minimalist aesthetic.

It uses the same control system as the SL3, which is one of the most focused interfaces we’ve encountered in many years. The SL3 is full of options and special functions, but the main control points are primarily geared towards the core exposure parameters.

A large dial on the top right of the camera and a command dial on the rear right shoulder handle most of your exposure controls, with a third dial on the left shoulder being customizable to cover a third parameter.

Beyond these, there are a series of customizable buttons whose function can be re-assigned by holding them down for a couple of seconds. The list of functions then available to be assigned can be modified in the camera’s main menu, meaning you only see a list of the features you’re likely to want quick access to.

The SL3-S gains a 2.3M dot tilting touchscreen without reducing its IP54 protection rating. Photo montage: Richard Butler

As with the SL3, swiping your finger right-to-left across the settings screen switches the camera from stills to video mode, indicated by all the highlighting in the menu switching from red to yellow.

The menus are comparatively sparse despite the presence of complex, multi-option features such as high-res mode. And, while I still get confused by pressing left, taking me one tab to the left in the menus but pressing right not having the opposite effect (it selects or changes the current option), overall, it’s one of the cleanest, most focused user interfaces in the industry.

Video mode selection

Where the camera’s behavior becomes very odd or, at least, very unfamiliar is in the way you select video modes. You can select a video mode based on any basic parameter: resolution, frame rate, chroma-subsampling method and so on. Unlike most cameras, this doesn’t then filter your list of other available options: if you then choose another parameter that’s incompatible with one you’ve already selected, the camera simply overrules your existing choice.

With the 6K option ‘locked,’ the other parameters are then limited to options that are compatible with that choice.

If it’s important to you, you can choose to ‘lock’ your selection. Doing so indicates that you’ve made an inviolable choice, and only then are the other options filtered so that you can only make selections compatible with your ‘locked’ selection. It’s a very unfamiliar way of working, but it means you don’t have to wade through a long list looking for a specific combination of settings and can instead just filter the options based on which properties are most important to you.

Battery

The SL3-S uses the same battery as the SL3, and is also compatible with the HG-SCL7 accessory grip and DC-SCL6 dummy battery options designed for it. Photo: Richard Butler

The SL3-S uses the newer, larger BP-SCL6 battery from the SL3 and Q3s. It’s a 15.8Wh capacity battery, up around 20% from the 13.4Wh of the SCL4. That’s enough to drive the SL3-S to a rating of 315 shots per charge, using CIPA’s standard testing protocol.

We always point out that CIPA numbers tend to significantly under-represent most people’s real-world use, but are usefully comparable between cameras of a similar type. And, while we typically say you can expect at least double the rated value, Leica has developed its own variation of testing, which extends the number to over 1000.

Either way, it’s a reasonable – but not great – number for a camera this big. And you’ll probably want to think about a second battery or a USB-charging pack of some sort for more intensive shoots.

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Initial impressions

The SL3-S takes its blacked-out minimalism from its predecessor which, unfortunately, is the approach that Panasonic has subsequently taken with its similarly-specced S5IIX model. Photo: Richard Butler

From Leica’s position, this is a lower-resolution, faster SL3 for $1700 less. But these cameras don’t exist in a vacuum.

The very nature of being a luxury brand is that the price premium is part of the appeal. This will sound absurd to some people. But the exclusive price tag, along with the distinctive design, innovative UI and use of impressively high-quality feeling materials, is part of what sets it apart from other products.

What risks undermining this is partly the commoditized nature of many of the components modern cameras are built from (they’re primarily using sensors, EVF panels and LCD screens purchased from a very small number of suppliers), but also the explicit technology tie-up with Panasonic.

Full-sized HDMI, headphone and mic sockets suggest Leica is serious about the SL3-S’s use as a video tool Photo: Richard Butler

This isn’t, in any way, to take away from Panasonic, but if you can count through the features on a $5000+ Leica camera and identify how many of them have come from this Panasonic collaboration, then the temptation is to look at the Lumix lineup and ask yourself how close to this camera could you buy, if you don’t need the super-premium build or superbly focused user interface.

Even for the ultimate heart-over-head purchase, the existence of the S5IIX risks amplifying the ‘head’ voice in the conversation.

It’s somewhat unfair to solely focus on the Leica’s price, but it’s also not really possible, from a reviewer’s perspective, because it’s essential that I acknowledge that it’ll immediately rule the camera out for a decent proportion of readers. But it is worth acknowledging the effort that’s gone into the SL3-S compared with its predecessor: the faster Wi-Fi and powerful Fotos app, the full-sized HDMI port and CFexpress card slot that have been added to support its more advanced video features. All these improvements, as well as the L²-sourced features such as multi-shot mode make it a much better camera.

The SL3-S is a beautifully-built camera with a genuinely compelling user interface. Our impressions of its autofocus are that, as with Panasonic, its dependability in terms of continuous AF and subject tracking is somewhere behind the best of its peers. But overall it’s a well-designed, feature-packed camera. The question is, does it have enough Leica stardust to make it appeal to you?

A short loan period and Seattle winter weather meant we weren’t able to shoot a sample gallery with the SL3-S, but the experience of the test shooting we did do was hugely enjoyable. Photo: Richard Butler