Triple Base ISO and 5K Raw: What the FX5 Brings to Run-and-Gun Work

Sony's new FX5 records 16-bit XOCN raw internally, a codec that until now lived only in the Burano, Venice, and Venice 2. Squeezing that into a compact cinema body reshapes what you can expect from a camera you can hand-hold on a sidewalk.

Filming a first look from the street outside Sony Pictures in Los Angeles, Jason Morris walks through the FX5 and the specs that separate it from the FX3 he's used for years. The sensor is fully stacked and shoots 5K, oversampling down to a clean 4K file with no real loss in detail. Open gate lets you record the entire sensor, something shooters have asked Sony for over multiple product cycles. Morris also points to triple base ISO at 800, 4,000, and 12,800, which opens up low-light work that the FX3 and FX2 can't match as cleanly.

The rolling shutter story has some nuance. In standard 5K, the sensor reads out faster than the FX3, which sits around 8.7 milliseconds. Flip on the dual-gain mode and the readout slows slightly, but you gain an extra stop of dynamic range in the shadows, so you can lift darker areas and hold highlights with cleaner results. The 3.2-inch four-axis vari-angle screen is the biggest Sony has put in this range, flipping out to the side or up. Morris flags the removable EVF as a direct answer to his main complaint about the FX2, where the finder stays bolted on whether you want it or not. Here you buy it separately and mount it only when the job calls for it.

Two features carried over from Sony's higher-end bodies stand out for anyone who obsesses over exposure. Waveforms and false color are both built in, tools Morris notes he doesn't even have on his own FX6. Zebras remain for those who prefer them. The menu system is the FX6, FX9, Burano, and Venice layout rather than the Alpha menus, so switching from a mirrorless body carries a learning curve. Instead of the familiar Alpha control dial, you get a press-and-scroll wheel that takes a while to feel natural. There's a catch to the top-end audio: 32-bit float internal recording only works with the new top handle, and without it you're limited to 24-bit through the multi-interface shoe and the 3.5mm jack.

Internal raw at 16 bits reflects a broader shift that's been building for a couple of years, where features once reserved for cameras costing five figures keep sliding down the lineup. The Burano proved Sony would loosen its grip on codecs like XOCN, and the FX5 pushes that further by handing you the same 16-bit recording in a body meant for solo shooters. If you own a mix of RED, Sony, or other cinema gear, the practical takeaway is grading latitude: 16-bit raw gives colorists far more room to push and pull than the 12-bit raw you'll find on many hybrid cameras, and dual-gain output stacks another stop on top of that. The constant rebooting Morris describes when changing frame rates or codecs isn't unique to Sony either. He points out the RED Komodo-X behaves the same way, so if you're moving up from a hybrid, budget mental time for the camera pausing to reconfigure itself mid-shoot.

Media is worth planning around before your first job. XOCN raw demands the fast CF Express Type A G cards, and the FX5 also takes dual SD. There's no USB-C SSD recording that Morris is aware of at launch, though firmware could change that, and he expects 5K image scanning up to 240 frames per second to arrive down the road. He's already placed his order and plans to run it as an A-camera in most situations, with a full review and side-by-side footage against the FX2, FX3, and FX6 still coming. Watch the full breakdown in the video above for Morris's hands-on notes.