Canon R6 Mark III Setup: Settings to Change Before Your First Shoot

To set up the Canon EOS R6 Mark III, decide how your two card slots are used, then set the shutter and burst mode, autofocus, stabilization and video recording settings before your first shoot. The camera takes a CFexpress Type B card in slot 1 and an SD UHS-II card in slot 2, shoots up to 40 fps with its electronic shutter, and records Canon Log 2 and Log 3 video.

This guide walks through those settings in the order that saves you the most trouble. If you want a shorter checklist, see Canon R6 Mark III Settings: What to Change First. If you are coming from the older model, Canon R6 Mark II vs R6 Mark III covers what changed.

Before you open the menu: battery, cards and lenses

Battery

The R6 Mark III is designed for one LP-E6P battery. LP-E6N and LP-E6NH batteries are supported, but with limitations. If you already own older packs, keep them as backups and use an LP-E6P as your main battery.

Memory cards

Storage uses a CFexpress Type B card in slot 1 and an SDXC UHS-II card in slot 2. This is the same split card setup as Canon's R5 series, and it is one of the two main physical changes from the R6 Mark II. PetaPixel reports that the CFexpress slot gives the R6 Mark III about twice the buffer depth of the R6 Mark II.

Put your fastest card in slot 1, since that is the slot that makes long bursts and high-bitrate video possible. Format both cards in the camera before you shoot, not on a computer.

Lenses

RF lenses mount directly, and EF and EF-S lenses work through the Mount Adapter EF-EOS R. If you have EF glass from an older Canon DSLR, the adapter lets you keep using it while you build an RF kit.

Set up card recording first

The R6 Mark III offers main/sub and main/proxy recording options across its two card slots. Fstoppers describes proxy and sub-recording to the second card as practical workflow additions on this model.

A proxy is a lightweight copy of your footage that edits smoothly on a modest computer. Sub-recording writes a second copy to the other card, which protects you if a card fails.

Choose based on what you shoot:

• Events, weddings and anything you cannot repeat: record to both cards so you always have a backup.
• Video you will edit on a laptop: record the main file to CFexpress and proxies to the SD card.
• Casual photography: recording to one card at a time gives you the most space.

Shutter and burst settings

Mechanical or electronic shutter

With the mechanical shutter or electronic first curtain, the R6 Mark III tops out at 12 fps. The electronic shutter reaches up to 40 fps, with full autofocus on full-resolution RAW and JPEG files. At 40 fps, the camera captures 12-bit RAW files.

There is a tradeoff. PetaPixel notes that the R6 Mark III's sensor is not stacked and reads out more slowly than the flagship R1's, so the R6 Mark III shows more rolling shutter at its top speed.

Shutter mode	Top burst rate	Notes from the evidence
Mechanical / electronic first curtain	12 fps	Shutter durability rated to 500,000 cycles
Electronic	40 fps	12-bit RAW at this speed; more rolling shutter than the R1

A sensible starting point is the mechanical shutter for everyday shooting, and the electronic shutter when you need the speed and your subject is not moving fast enough to bend.

Pre-continuous shooting

Pre-continuous shooting lets you half-press the shutter and capture a rolling buffer of 20 images at 40 fps. When you fully press, the camera saves those 20 frames and keeps shooting at 40 fps until the buffer fills, which PetaPixel puts at around 150 shots with a CFexpress card and RAW+JPEG. Digital Camera World describes this as half a second of pre-capture.

This is not the same as the R6 Mark II's RAW burst mode. That mode only worked with RAW files, packed the images into a single file you had to extract, and locked the camera while the buffer cleared.

Turn pre-continuous shooting on for birds, sports and kids, where the moment happens before you react. Leave it off for portraits and landscapes, because every half-press can fill your card with frames you do not need.

Buffer depth

In The-Digital-Picture's buffer test, the R6 Mark III captured 254 images in 7 seconds at 40 fps before the buffer filled, and cleared it in 5.4 seconds. That test used manual exposure and focus, a black frame for the smallest file size and a Lexar 2TB Professional GOLD CFexpress 4.0 Type B card, so expect fewer frames in normal shooting.

One more thing to know: PetaPixel reports that the R6 Mark III's viewfinder is not completely blackout-free during continuous shooting.

Autofocus: let subject detection do the work

The R6 Mark III inherits the autofocus system from Canon's R1 and R5 Mark II, with improved subject detection compared to the R6 Mark II. Its Dual Pixel CMOS AF covers the entire image sensor. In PetaPixel's review, autofocus was more consistent and reliable than on the R6 Mark II.

For your first shoots:

• Set subject detection to match what you shoot most, and let the camera find eyes and faces for you.
• Use continuous autofocus for anything that moves, and single-shot autofocus for still subjects.
• Use the joystick to move the focus point, which PetaPixel singles out as excellent and well placed.

For video, the R6 Mark III includes focus acceleration and deceleration algorithms from Canon's EOS Cinema C80 and C400 cameras. Slower, smoother focus transitions usually look better for interviews and talking-head clips, while faster settings suit action.

Stabilization settings

IBIS is rated up to 8.5 stops of correction at the image center and 7.5 stops at the periphery when coordinated with certain RF IS lenses. That is a small step up from the R6 Mark II's 8 stops.

For video, Movie Digital IS can be added on top, and a subject-tracking IS mode locks stabilization to your tracked subject. Try subject-tracking IS for walking shots where you follow a person, and leave Digital IS off when you want the widest framing and handheld motion is not a problem.

Exposure and image quality

ISO

The move to the new sensor drops the maximum native ISO from 102,400 on the R6 Mark II to 64,000 on the R6 Mark III. In The-Digital-Picture's testing, underexposing by 3 stops produced a barely perceptible noise penalty compared with using the correct, 3-stop-higher ISO, even at high ISO settings.

In practice, that means you can keep ISO lower to protect bright highlights and brighten the file later, as long as you shoot RAW. Set an Auto ISO ceiling you are comfortable with, then adjust after you review your first images.

File format

Start with RAW+JPEG. The JPEG gives you something to share right away, and the RAW file gives you room to fix exposure and color. PetaPixel notes that the R6 Mark III can capture full-resolution RAW and JPEG photos at up to 40 fps. Some reviewers consider its color rendering better than the Sony a7 V's.

Features you will not find

The-Digital-Picture reports that Multi-shot Noise Reduction, available on many recent EOS models, is not in its R6 Mark III's menu. If you are used to it from another Canon body, plan on standard noise reduction in editing instead.

Video settings to choose before you hit record

If you are new to shooting video, read the Beginner's Guide to Shooting Video with Any Camera first, then come back to these settings.

Recording mode	What it is for
4K/60p oversampled; 4K/30p with 7K oversampling	Everyday high-quality video
4K/119.9p	Slow motion
7K/59.94p RAW Light	Maximum editing latitude, large files
7K/30p open gate	Vertical crops and stabilizing in post

Open gate gives you maximum vertical resolution and room for post-stabilization, according to Fstoppers. That makes it useful if you deliver both horizontal and vertical versions of the same clip.

Picture profile and monitoring

Canon Log 2 and Log 3 are both supported. Log footage looks gray straight out of the camera and needs color grading, so only use it if you plan to edit color. For quick turnaround clips, a standard picture style is simpler.

When you do shoot log, turn on the exposure tools. The camera offers waveform display and false color. A waveform helps you avoid clipped highlights that the flat image on the screen can hide.

Audio, outputs and streaming

The R6 Mark III supports 4-channel audio and has a full-size HDMI port, replacing the R6 Mark II's micro HDMI. Digital Camera World reports it is Canon's first full-frame camera to offer UVC webcam output at up to 4K 60p over USB. Fstoppers also lists a 10 Gbps USB-C port and 5 GHz Wi-Fi.

Heat and recording limits

Canon's thermal guidance shows several 4K modes with no overheating restrictions, while high-bitrate and high-frame-rate modes have documented shutdown windows. PetaPixel ran its tests indoors at 21 degrees Celsius with the camera's heat recording threshold set to "High".

• 4Kp30 Fine: 103 minutes until the battery died, with no overheating.
• 4Kp60 Fine: 28 minutes before the camera overheated and shut down.
• 4Kp24 RAW: 42 minutes before the CFexpress card overheated.
• 7Kp30 Open Gate: 34 minutes before the camera overheated and shut down.

PetaPixel calculated that doubling the frame rate to 60p cut record time by 73%, and open gate cut it by 67%. Unlike the C50, the R6 Mark III has no fan.

If you film long events, interviews or ceremonies, use 4K/30p for the long takes and save 60p, RAW and open gate for short clips.

Build a quick menu that matches how you shoot

PetaPixel describes the R6 Mark III's quick menu and overall menu structure as well organized. Load the quick menu with the settings you change most often: drive mode, shutter type, pre-continuous shooting, subject detection and, for video, frame rate and picture profile.

For a broader look at how Canon menus are laid out, see the Canon Camera Menu Setup Guide.

Which body or bundle to get

Canon listed the R6 Mark III body at $2,799, a kit with the RF24-105 F4 L IS USM at $4,049, a kit with the RF24-105 F4-7.1 IS STM USM at $3,149, and a body bundled with Stop Motion Animation Firmware at $2,899. The firmware bundle only makes sense if you plan to make stop motion animation.

The R6 Mark II remains in Canon's lineup. At the time of PetaPixel's review it was on sale for $2,099, which PetaPixel called a compelling option for tighter budgets, while judging the R6 Mark III worth the extra money for most buyers.

If you plan to rig the camera for video with a monitor, microphone or handle, a cage gives you mounting points without screwing accessories into the body.