Why it matters

FX5 is worth the jump only if Open Gate, internal X-OCN, faster stacked-sensor readout, and production I/O change what you can deliver. FX3 already records 4K120 internally, outputs 16-bit RAW over full-size HDMI, uses the established NP-FZ100 battery and accessory ecosystem, and occupies less rig space. Do not pay today for 5K120 or 4K240 on the promise that future firmware will arrive exactly as planned.

What to compare

  • At launch, FX5 uses a 16.6MP fully stacked full-frame Exmor RS sensor and records 5K60 in 3:2 Open Gate X-OCN plus 4K120. FX3 uses a 10.3MP back-illuminated full-frame sensor, does not support Open Gate, and records internal 4K120 with an approximately 10% crop. FX3 can output 16-bit 4264 x 2408 RAW over HDMI, but it cannot record RAW internally.
  • The roadmap must stay separate from current capability. Sony plans firmware v2.0 for August 2027 or later with 5K120 Open Gate and cropped 4K240, subject to change. Neither mode is available on FX5 at release, and launch Open Gate is X-OCN-only rather than the future 3:2 XAVC S-I option.
  • FX5 offers base ISO 800/4000/12800 and Dual Gain, while FX3 lists base ISO 800/12800. Sony claims 15+ stops in S-Log3 for both cameras. The extra base setting and stacked design do not prove a dynamic-range winner without matched independent measurements.
  • FX5 adds a 3.5-inch 2,764,800-dot four-axis LCD, optional DVF-EL1 viewfinder, active cooling, two USB-C ports, Ethernet, and the higher-capacity NP-SA100 battery. FX3 uses a 3.0-inch 1,440,000-dot side-opening screen, active cooling, one USB-C port, and the familiar NP-FZ100 battery in a smaller body.
  • Internal X-OCN can simplify a RAW rig, but it increases media, transfer, storage, and post-production demands. The $4,899.99 FX5 body does not include the $5,499.99 kit's XLR-H2 handle, while FX3's original canonical configuration includes its supplied XLR handle. Price the complete rig and verify editing support before treating internal RAW as an automatic upgrade.

Who it is for

  • Buy Sony FX3 if compact rigging, a mature 4K workflow, NP-FZ100 batteries, a supplied XLR handle, and occasional external HDMI RAW cover your work better than 5K Open Gate or internal X-OCN.
  • Buy Sony FX5 if current 5K60 Open Gate X-OCN, internal 16-bit RAW, the fully stacked sensor, three base ISO settings, Ethernet, larger monitor, and production-oriented body justify the new media, battery, accessory, and post-production path.

Watch-outs

  • FX5 body-only and XLR-handle-kit launch prices are $4,899.99 and $5,499.99, with mid-August U.S. availability announced. Stock, promotions, and regional bundles can change after July 23, 2026.
  • 5K120 and cropped 4K240 are planned for firmware v2.0 in August 2027 or later. They are not current release features, and Sony says future specifications can change.
  • FX3's current internal 4K120 mode uses an approximately 10% crop. Its 16-bit RAW path requires a compatible external recorder over full-size HDMI.
  • FX5's optional DVF-EL1 and XLR-H2 handle both use the Multi Interface Shoe, so they cannot occupy it together without a separate mounting arrangement.
  • One independent preproduction review used prototype v2.0 firmware and found support for the new X-OCN files still developing across editing software. Check your exact NLE, storage, and proxy workflow before buying.