If you're shooting with an 8K camera, then why not record in 8K raw format using the Ninja V+ 5.2" 8K HDMI H.265 Raw Recording Monitor from Atomos. The Ninja V+ is the same on-camera monitor/recorder as its predecessor the Ninja V 5", but the Ninja+ now features a 5.2" display and records and plays back up to 8K raw video to and from purpose-built mini-SSDs. HDMI or SDI connection.
The Ninja V+ can record Apple ProRes raw up to 8K30 or DCI 4K120 directly from the sensor, and it is compatible with select cameras such as the Canon R5, Sony FX6 and Sony A7R3. It also includes a H.265  license to record with the high-quality, low-bandwidth codec for up to 10-bit recording in ProRes 4:2:2. Display features include a 10-bit screen with a brightness of 1000 cd/m² AtomHDR technology for accurate monitoring of your log gamma footage, and support for popular log formats from Sony, ARRI, Canon, JVC, Panasonic, Nikon, RED, Sony, and Z CAM cameras.

Built to withstand the rigors of production, the Ninja V+ features an aluminum chassis and powers from a single L-series battery or D-tap adapter. Additional features include a variety of on-screen exposure analysis, framing, anamorphic de-squeeze, and focus assist tools.  AtomX SDI  modules, and an SDI Raw license key further expand this Ninja V+ capabilities. 1 x Atom X 500GB SSD included. Additional SSDs available.

Atomos Ninja V+ 5.2" 8K HDMI/SDI H.265 Raw Recording Monitor $120/day+GST