Sony A7cii vs Sigma Bf

The Sony A7C II, equipped with a 33 MP sensor, represents a notable advancement from the A7C in the full frame mirrorless camera category. The model, released in September 2023, incorporates the BIONZ XR processor, which significantly improves image quality and overall performance. This model maintains the same compact and lightweight design as the A7C, offering the same dimensions while featuring a slightly higher-resolution screen and enhanced video capabilities, including 4K UHD recording at 60 fps and 1080p at 120 fps. Some users may find the cropping capabilities in 4K 60p mode to be insufficient.

The A7C II's single SD slot (UHS-II) makes it an ideal choice for photographers and videographers seeking a portable solution that does not compromise on quality. Its advanced features make it an excellent choice for advanced amateurs and professionals seeking a versatile second camera. The camera is particularly well-suited to street, portrait, and landscape photography, but thanks to its 10 fps burst rate and AI-powered autofocus, it is also an excellent choice for sports and wildlife photography.

While the battery life of this model is slightly reduced compared to the A7C, the price/performance ratio remains highly attractive, particularly in light of the numerous enhancements. In conclusion, the Sony A7C II represents an appealing option for those seeking a balance between performance and portability in a full-frame mirrorless camera.

In March 2025, Sigma broke new ground with the Sigma BF, which was launched four years after the Sigma FP L, offering a bold innovation in the modern mirrorless camera segment. This full-format 24.6MP camera is a monoblock body cut from a single block of aluminium, making it remarkably light at just 446g. It has a top electronic speed of 1/25,600 and offers a moderate 8fps burst speed, with a buffer capable of handling 350 RAW files. The Sigma BF also takes a minimalist approach by eliminating memory card slots in favour of 230GB of internal memory, which can hold more than 14,000 JPEG files or 4,300 uncompressed RAW images, and is equipped with the new BP-81 battery.

The Sigma BF also boasts a completely new user interface. All key settings – shutter speed, aperture, ISO, exposure compensation and colour mode – are centralised on a fixed 2.1 megapixel, 8 cm diagonal touch screen. With just three buttons, a dial and a shutter release, the simplified interface ensures intuitive shooting, complemented by thirteen colour modes that offer a vast creative palette. Its mirrorless autofocus, which combines phase and contrast detection using the latest generation of algorithms, is renowned for its ability to effectively detect objects, faces and even animals such as dogs and cats.

Finally, the Sigma BF extends its functionality to video, allowing 6K recording at 30 fps with L-log support, exploiting the wide dynamic range of its full-frame sensor, even if stabilisation remains purely electronic. With its cutting-edge technical features and ergonomics designed to bring the photographer closer to the moment, this camera is a unique option in the world of mirrorless cameras. L-mount lens enthusiasts with a passion for elegant design will discover a powerful, simple, lightweight and discreet tool.