Sony Registers New Camera, Sparking A7S IV Speculation

Sony has registered a new camera in California, fueling speculation about a possible successor to the A7S III. The camera, identified by the model code WW491229, was registered with the California Energy Commission on October 31, 2026, according to Sony Alpha Rumors.

The registration reportedly lists the NP-SA100 battery as the camera’s power source. This is notable because the same battery is used by Sony’s FX5 and A7R VI, two of the company’s newest high-end camera models.

The battery information also appears to rule out the upcoming $80,000 medium-format Sony cinema camera, which is reportedly expected to use a different power source.

Sony registered a new camera code in California!
https://t.co/OQ4031LNsM https://t.co/LpcjX6rGWu

— SonyAlphaRumors (@SonyAlphaRumors) November 10, 2026

Could Sony Be Preparing an A7S IV?

Sony Alpha Rumors also points to an existing camera registration in China under the model code WW261362. According to the rumor site, this camera uses the same NP-SA100 battery and supports Wi-Fi 6. It is also reportedly being manufactured in Japan, which the site interprets as a possible indication that it is a high-end model.

The publication speculates that WW491229 and WW261362 could be registration codes for the same camera. Potential candidates include the Sony A7S IV, a successor to the FX6, or another high-end Alpha camera.

An A7S III successor is an appealing possibility, given how long the current model has been on the market. The A7S III remains a video-focused full-frame camera, but a replacement could bring higher-resolution video capabilities and more modern features while retaining the series’ emphasis on low-light performance.

A new model could also give Sony a stronger competitor to hybrid cameras such as the Canon EOS R6 Mark III, particularly for photographers and videographers who want a camera that balances high-resolution capture with video-first features.

No Official Announcement Yet

For now, the A7S IV remains speculation. Sony has not confirmed that it is developing a new model, and the camera registration does not reveal its identity or specifications.

The registered camera could just as easily be an FX6 successor or another high-end Alpha model. More information will be needed before its intended position in Sony’s lineup becomes clear.