Designed with solo operators in mind, the Canon EOS C70 combines the professional features found in Canon's Cinema EOS range with the portability and versatility of the mirrorless Canon EOS R line-up.

Now the creative options possible with the RF-mount camera have been expanded even further, thanks to the EOS C70's latest firmware updates.

Support for a raft of Canon's EF photo and EF Cine Prime lenses has been added to the Canon Mount Adapter EF-EOS R 0.71x. The camera also now benefits from a new RAW video format that can be captured internally. XF-AVC Proxy recording, two additional Custom Picture profiles and both Frame recording and Interval recording are also now available.

Here, Paul Atkinson, Product Specialist at Canon Europe, explains the benefits these additional features bring to filmmakers.

One of the key benefits of the latest firmware update is the introduction of 4K Cinema RAW Light (CRL) recording to the Canon EOS C70, enabling videographers to explore the superb sensor’s full potential.

"Although the XF-AVC files, or non-RAW files, are very robust and allow you to do a lot in post, RAW video gives you that bit extra,” explains Paul. "The 4K Dual Gain Output (DGO) sensor in the EOS C70, for instance, gives you more dynamic range, in excess of 16-stops, and you can really exploit that by shooting RAW video.

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"A RAW file is essentially the image as captured, with no processing carried out in camera," he continues. "This creates a larger file which is able to undergo extensive post-production. Depending on the software used, you can adjust the exposure and change the appearance of colours, contrast, white balance and even the effective ISO without damaging the original file.

"It's slightly different to the Cinema RAW Light format that we first introduced in the Canon EOS C200 and then in the EOS C500 Mark II and the EOS C300 Mark III," Paul adds. " It’s much less resource-hungry, but it still gives you the freedom that you get with a RAW file."

While they are still large files, using the Cinema RAW Light format means that the footage can be saved to an SD card in the EOS C70 rather than to an external recorder – helping to minimise the size and weight of your kit.

Alongside 4K Cinema RAW Light recording, the latest firmware update introduces the ability to simultaneously record an XF-AVC proxy file to the second memory card, with each file type sharing the same timecode. "The EOS C70 could already record different file types to different cards in the two slots, but this update adds the ability to record an XF-AVC to one card, while the CRL footage is recorded to the other," Paul explains.

"The XF-AVC proxy files allow you to do an offline edit in any editing system while the RAW files are being processed and graded. You can then bring them together at the end of the process to make the final product. It streamlines your workflow, requiring less storage and processing power."

The new Frame recording feature is useful for creative filmmaking and applications such as stop-frame or stop-motion animation as it allows the user to select whether 1, 3, 6 or 9 frames are recorded each time the record button is pressed.

Interval recording, meanwhile, adds the ability to specify the frequency of recording after pressing the record button when setting the number of frames to record. Following the firmware upgrade, the EOS C70 can be set to record every 1, 2, 3, 5, 10, 15 or 30 seconds, or every 1, 2, 3, 5 or 10 minutes with 1, 3, 6 or 9 frames being captured each time. It's ideally suited for creating time-lapse videos, condensing long-duration action, such as a colourful Aurora Borealis display, the changing light throughout the day or some form of natural history, into a short but powerful movie.

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The EOS C70 features Canon's RF mount, so it's compatible with all Canon RF lenses. In December 2020, support for the Canon EF 16-35mm f/2.8L III USM, EF 24-70mm f/2.8L II USM and EF 24-105mm f/4L IS II USM was added to the Canon Mount Adapter EF-EOS R 0.71x, and in June 2021, a further seven EF lenses were included on the compatibility list. The latest firmware update adds an additional 13 EF and Cine Prime lenses with full optical correction, view/metadata and AE/AF (for supported lenses).

You would normally need to take the focal length difference into consideration when using full-frame glass on a crop sensor, such as the EOS C70's Super 35mm, but mounting via the Canon Mount Adapter EF-EOS R 0.71x means you can benefit from the same full-frame field of view. "That means the Canon CN-E20mm T1.5 L F actually shows the field of view of a 20mm lens," explains Paul. "In addition, you gain an effective one-stop increase in the maximum aperture. For example, a lens with a maximum aperture of f/4 effectively becomes one with a maximum aperture of f/2.8, which results in a one-stop brighter image.

"Canon’s Cine Prime lenses are fully manual, so you don’t get auto exposure or autofocus capabilities, but you can use the Dual Pixel Focus Guide, which tells you which way you need to rotate the focus ring. The standard EF lenses are fully compatible with full autofocus and you also get aperture control."

Newly compatible lenses via the Canon Mount Adapter EF-EOS R 0.71x:

• Canon CN-E14mm T3.1 L F
• Canon CN-E20mm T1.5 L F
• Canon CN-E24mm T1.5 L F
• Canon CN-E35mm T1.5 L F
• Canon CN-E50mm T1.3 L F
• Canon CN-E85mm T1.3 L F
• Canon CN-E135mm T2.2 L F
• Canon EF 14mm f/2.8L II USM
• Canon EF 24mm f/1.4L II USM
• Canon EF 35mm f/1.4L II USM
• Canon EF 50mm f/1.2L USM
• Canon EF 85mm f/1.2L II USM
• Canon EF 135mm f/2L USM

Lenses added in June 2021:

• Canon EF 16-35mm f/2.8L II USM
• Canon EF 16-35mm f/4L IS USM
• Canon EF 24-105mm f/4L IS USM
• Canon EF 70-200mm f/2.8L IS II USM
• Canon EF 70-200mm f/2.8L IS III USM
• Canon EF 70-200mm f/4L IS USM
• Canon EF 70-200mm f/4L IS II USM

The EOS C70 firmware update adds EOS Standard and EOS Neutral to the list of Custom Picture profiles, which already included C1: BT.709 Wide DR, C2: Canon Log 2, C3: Canon Log 3, C4: PQ, C5: HLG and C6: BT.709 Standard. In addition, C9 to C20 can be set to a user's preference.

"The Custom Picture profiles enable you to better match the look created by different cameras," explains Paul. "If you were shooting with the EOS C300 Mark III and the EOS C70, for example, you might want to shoot in Log 2 or Log 3. If you didn't want to do much grading or were shooting with the EOS C70 and a DSLR or mirrorless camera, setting them both to the Standard or Neutral profile would give you a closer match."