Fujifilm GFX ETERNA 55 · 43.8 × 32.9 mm · 102 MP

Pick a window, then a frame, then a codec

Every ETERNA recording is three decisions in order. The sensor window decides what glass covers and how big the image looks. The recording mode decides pixels, aspect and the frame-rate ceiling. The codec is last and never changes the picture.

STEP 1

Choose sensor window

Drawn to scale against the full chip. The dashed grey frame is an ALEXA Mini LF at open gate (36.7 × 25.5 mm) for reference. Tap a format or a rectangle.

STEP 2

Choose recording mode

STEP 3

Choose codec

Any mode records to any codec. ProRes bitrate is fixed by the flavor; H.265 lets you pick. Data rates below are for the frame you selected above.

Apple ProRes

10-bit 4:2:2 · fixed rate

MOV or MXF wrapper. CFexpress Type B only. Rates scale with pixels × fps; figures are estimates from Apple's published 1080p rates.

Rule of thumb: 422 HQ for anything graded, 422 when the card budget matters, LT for interviews and b-roll that will stay close to camera. No 4444 and no internal RAW.

H.265 / HEVC

10-bit 4:2:2 · selectable

MOV or MXF wrapper. Same five bitrates in every mode, so the picture quality per pixel changes with the resolution you chose. Tap a rate.

All-Intra

Long GOP

720 Mbps needs CFexpress or a V90 SD card; 360 needs V60; lower rates run on any V30 card. All-Intra edits like ProRes; Long GOP is a quarter the size for the same look but asks more of the edit machine.

Proxy recording (H.264 or ProRes Proxy) can run beside the main file on the second slot. External RAW is output only: HDMI carries 4K 4:3 Open Gate, 4K 16:9, 8K 17:9 and 8K 16:9; SDI carries the two 4K sizes.

Sources: Fujifilm GFX ETERNA 55 specifications (pixel sizes, frame rates, bitrates); FDTimes camera report, Jan 2026 (active sensor dimensions per mode). Mini LF open-gate dimensions from ARRI.