Canon EOS C70 4K Super35 Cine Camera

This is the first Canon Cinema EOS Camera with an RF Mount. It has a Super 35mm Sensor.

If you’re familiar with the C300 Mark III, you’ll be at home with many of the C70 capabilities.

Why would you want a C70 then? Because it is smaller than the C300 Mark III, is half the cost, has a versatile RF mount and can record H.265 video.

September 24, 2020. Canon’s press release reads:

“Canon is excited to announce the company’s first-ever RF mount Cinema EOS camera, the EOS C70 4K Digital Cinema Camera. When the Canon RF mount was first introduced, imaging professionals began to dream about the possibilities that this revolutionary mount system might provide them. One request that Canon consistently heard was to put an RF mount on a Cinema EOS camera so that future lens performance could capitalize on the short flange depth. Just two short years later, those wishes have come true with the new C70 camera.”

Hurray! One of those people who dreamed of RF mounts was me. Jarred Land RED was another. (See KOMODO article.) The RF mount’s shallow, 20 mm flange focal depth accommodates not only innovative Canon RF lenses, but also—by means of adapters—almost any other cine or photo lens on earth. This includes EF, M, PL, LPL, PV, SP70, R, GX, F, S, BNCR, and more.

The new Canon C70 and RED KOMODO have RF mounts.

The other 20 mm flange focal depth (FFD) mount is the L-Mount, created by Leica and shared by SIGMA and Panasonic.

Sony cameras are equipped with an E-mount (18 mm FFD).

Fujinon’s X-series is 17.7 mm FFD and GFX is 26.7 mm FFD. Nikon Z mount is 16 mm FFD.

I expect the new Canon EOS C70 will blaze the path for an entire line of new RF mount cine cameras from Canon in both Super35 and Full Frame.

The C70 sensor is the same as the Canon EOS C300 Mark III but the recording capabilities are different. While the C300 Mark III, introduced in April this year, can record up to 4K RAW Light 12-bit (to 30 fps) onto CFexpress cards at data rates of 1 Gbps, the new EOS C70 doesn’t trample those toes. Instead, it records  XF-AVC or MP4 to SD cards at half the data rate.

The C70 camera came so suddenly that, in the absence of an in-depth interview with the designers thus far, please indulge the locked-down mind, neither delirious nor inebriated nor dexamethasoned, and let’s take an imaginary journey to meet with the planners and designers at Canon in Tokyo.

The cast of characters in the room includes the intrepid investigator from FDT, engineers and planners from Canon, and a fantasy assortment of industry luminaries invited to comment. There’s Rusty Gates, Camera Assistant to the stars, flying in from Hollywood. Award-winning DP Itsy Bitzer, ABC, ADD, landed from London. The goddess of handheld, Lucy Lumiere, happens to be scouting in Kyoto and arrived by Shinkansen.

Surely, Canon planners had watched in amusement, or was it horror,  as so many Canon mirrorless cameras seemed to sprout wings and sport lollipops on top with assorted appendages, cages, and on-board recorders to view and capture higher quality video.

“What if you make the mirrorless camera thicker,” Itsy suggests. “You could incorporate the recorder and monitor in back.”

“It should have the familiar handgrip of a mirrorless camera,” Lucy advises.

“The camera should autofocus with RF lenses,” Rusty suggests, ever eager to avoid having to pull focus if he can.   

Anyway, enough speculation­—let’s dive in and look at the C70.


Canon EOS C70 4K Digital Cinema Camera

The EOS C70 camera is like a bridge between the Photography EOS and Cinema EOS families. It is small and lightweight—2.6 lb—and a breeze to handhold.

The C70 has a thin, motorized ND filter unit that is only 6 mm thick. This is fitted in the less-than 20 mm gap between the RF mount and the sensor. ND buttons are in the familiar Cinema EOS location: on the camera left side.

13 custom buttons let you select from more than 80 functions.

Tatsuro  Kano, Executive Vice President and General Manager of Canon U.S.A.’s Imaging Technologies & Communications Group said, “The EOS C70 will provide a familiar form and feature set to our entire spectrum of imaging customers. We are eager to see how creatives use this tool and the projects that come from it.”

The camera has a Canon Super 35mm Dual Gain Output (DGO)  sensor that reads out each photodiode at two different degrees of gain, like two different exposures for each frame. One “exposure” protects details in highlight areas and the other emphasizes shadow detail. The result is an image that Canon measures up to 16+ stops of dynamic range.

The C70 can record 4K DCI or UHD up to 120 fps and 2K DCI or HD up to 180 fps.

The camera records in XF-AVC format (variable bit-rate) – both Intra and Long GOP with an MXF file “wrapper”—in 4K at 4:2:2 10-bit. Another choice is Long GOP 10-bit 4:2:2/4:2:0 MP4/HEVC with an MP4 file container — a first in the Cinema EOS line.

The C70 has an active fan cooling system. Air intake is on the camera left side. The exhaust vent is on the camera right side, above the integrated handgrip. This cooling system is isolated from the sensor and electronics to protect them from water, sand, and dust and allows uninterrupted recording for extended periods of time.

Canon EOS C70 Details

  • Sensor: Super35 CMOS Dual Gain Output sensor with Dual Pixel Autofocus. Super16 crop available.
  • Total Pixels: 9.6 Megapixels (4206 x 2280)
  • Effective Pixels: 8.85 Megapixels (4096 x 2160): 4K/2K DCI
  • 8.29 Megapixels (3840 x 2160): UHD/FHD
  • High Framerates:4K 120p and 2K CROP 180p
  • Image Processor: DIGIC DV 7
  • Lens Mount: RF Mount
  • Dynamic Range: 16+ stops
  • ISO: 100*–160–25600–102400* (* = expanded)
  • Internal ND: 2, 4, 6, 8**, 10** stops  (** = two filters)
  • Focus Guide: Canon’s famous up or down green triangles converge on the monitor when subject is sharp.
  • LCD Monitor: 3.5-inch (8.8 cm diagonal) LCD with 16:9 aspect ratio, approx. 2.76 million dots, (1280 x RGB x 720)
  • Direct Touch Menu System
  • No EVF (use the built-in, swing away LCD Monitor).

Video Formats

  • XF-AVC: MPEG-4 AVC / H.264
  • MP4 (HEVC): H.265 / HEVC
  • MP4 (AVC): H.264 / AVC
  • Color Space: Cinema Gamut, BT.709, BT.2020
  • Gamma: BT.709, Wide DR, Canon Log 2, Canon Log 3, PQ, HLG
  • White Balance: 2000K – 15000K with -20CC to +20CC green/magenta correction; AWB, Daylight, Tungsten, Set A, Set B
  • SD Cards: 2 slots. SD/SDHC/SDXC supported
  • Electronic Image Stabilization
  • Time Code: Count-up Non Drop Frame; Drop Frame (only in 59.94 Hz mode); Regen, Record Run, Free Run, External Source.
  • Audio: (1) Linear PCM (16 bit – 48kHz; 4-channel recording), (2) AAC (16-bit – 48kHz; 2-channel recording)
  • Audio Input:  2 channels Mini-XLR; MIC jack (3.5mm), INPUT REMOTE LANC/RC-V100.
  • Output: HDMI, 3.5mm stereo headphone mini-jack
  • Input/Output: Time Code, USB-C
  • DC IN: 24 V DC
  • Battery: 14.4 V DC
  • Dimensions, body only: (W x H x D) approx. 6.3 x 5.1 x 4.6 in. /160 x 130 x 117 mm
  • Weight, body only: approx. 2.6 lb. /1179.3 g
  • Custom picture processing via import of 3D LUTs and recording to Look Files

Swing-away, tilt and swivel onboard LCD monitor and an onboard BP battery

Canon Mount Adapter EF-EOS R 0.71x

Canon has sold more than a hundred million Full Frame EF still lenses. So it’s no surprise that they encourage you to use these lenses on the Super35 C70 with their dedicated Canon Mount Adapter EF-EOS R 0.71x. It’s not a mechanical-only adapter. There are optics and electronics inside. So, this adapter does several important things.

1. It lets you attach EF lenses in the RF mount.

2. It keeps the original Full Frame lens’s angle of view in Super35.

3. A Full Frame lens will gain 1 T-Stop with the adapter in S35 format.

4. The adapter preserves full electronic communication between the lens and camera, enabling optical lens corrections and lens metadata transfer between the C70 camera and certain Canon EF lenses.

As of September 24, 2020, compatible EF lenses currently are:



EF24-70mm F2.8L II USM

EF24-105mm F4L IS II USM

Firmware update is provided free of charge.

Compatibility will be added for additional EF lenses in the future.

Even if you do not update the firmware, you can use the EF lens, but it is recommended to use the firmware update in order to effectively take advantage of as many functions in connection with the camera as possible.

Price & Availability

The Canon EOS C70 4K Digital Cinema Camera is scheduled to be available in November 2020 for an estimated retail price of $5499.00.

The Canon Mount Adapter EF-EOS R 0.71x is scheduled for December 2020 at an estimated retail price of $599.99. For more information:

Specifications, availability and prices are subject to change without notice. Actual prices are set by individual dealers and may vary.

A few of the many Recording Formats

(This is a “reprint” from Nov 2020 FDTimes issue 105.)

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