Ironically, in this case, it sounds like Canon is actually limited by its processing power..!

@Eno Vitaly suggests this is the case in his previous post; I don’t have an educated opinion otherwise. Canon certainly has a history of crippling features! But this seems plausible.

But maybe you’re right and Canon will issue a firmware update in a year! ;)

PR

Canon U.S.A. Inc., a leader in digital imaging solutions, today announced the highly anticipated Canon EOS-1D X Mark III camera -- the successor to the world-renowned and award-winning EOS-1D X Mark II. The Company's new flagship DSLR has been engineered and designed using extensive feedback from the professional sports, photojournalist, wildlife and wedding photographers.

This new groundbreaking workhorse EOS-1D X Mark III DLSR Camera features:

• New 20.1 Megapixel Full-frame CMOS Sensor combined with newly designed High Detail Low-Pass Filter
• New DIGIC X Image Processor with an ISO range of 100-102400; Expandable to 50-819200
• New 191-point optical viewfinder AF system capable of tracking the subject's head, and face using Deep Learning Technology
• New Smart Controller built into the AF-On button for fast control of the AF Point selection
• Dual Pixel CMOS AF for fast and accurate autofocus in Live View covering 90%x100% of the image area at an EV of -6 ~ 18
• The lightning-fast camera features the ability to shoot up to 16 frames-per-second in optical viewfinder shooting and up to 20 fps while in Live View shooting with mechanical or silent shutter
• Maximum buffer in continuous shooting (RAW+JPEG) of 1000 images or more with dual CFexpress card slots
• 12-bit 5.5K RAW video internal recording and oversampling 4K 60p video recording using the full width of the sensor in Canon Log with 10-bit 4:2:2

"When engineering and designing the new flagship camera, Canon's top priority was collecting and implementing extensive user-feedback from a variety of professionals," said Kazuto Ogawa, president and chief operating officer, Canon U.S.A., Inc. "In the end, the outcome is at first glance a familiar tool, but in reality, so much more; a camera unlike anything the company has introduced before. Canon is eagerly waiting to see what timeless memories professional image makers capture with this new camera."

At the camera's core is Canon's newly developed 20.1 megapixel full-frame CMOS sensor, a High Detail Low-Pass Filter and the DIGIC X image processor. These features will help to provide professional photographers with a fast and powerful tool to capture images with a greater level of resolution, higher sensitivity, reduced moiré and improved image quality in higher ISO ranges with reduced noise. Utilizing a single DIGIC X image processor and a DIGIC 8 dedicated for AF/AE the camera's image processing performance far exceeds and surpasses that of its predecessor, all while reducing power consumption. The DIGIC X is capable of up to approximately 3.1 times the image processing and 380 times Dual CMOS AF processing performance compared to the dual DIGIC 6+ found in the EOS-1D X Mark II. The new powerful image processor also allows for an ISO range of 100-102,400 (expandable up to 50-819,200), providing users with higher clarity images and quality in various shooting situations.

The EOS-1D X Mark III camera also provides users with equally impressive video features, with the ability to internally record 5.5K RAW video and uncropped 4K 60p derived from the original 5.5K readout in Canon Log with 10-bit 4:2:2. Canon Log allows users to record 4K and 1080p video files with up to 12 stops of High Dynamic Range and wide exposure latitude, making it simple to coordinate color settings with other Canon cameras in multi-camera set-ups. It's ideally suited to help streamline and provide greater creative freedom during the extensive post-production processing. In addition, the camera's HDMI terminal can be used to transmit 4K 60p data to another device for display or external recording.

When developing the EOS-1D X Mark III, Canon put a heavy emphasis on designing and installing a completely overhauled and comprehensive Auto Focus system for the user with the need for speed. The new 191-point AF system with 155-point all cross-type points helps users to quickly and smoothly track a subject and maintain a level of focusing accuracy during a variety of shooting situations such as tracking a motorcar circling around the race track or a leopard bolting across the plains. Canon has redesigned the AF sensor incorporating a new square pixel design based on an image sensor, essentially making the AF sensor 28x higher resolution at the center area.

Canon's revolutionary Dual Pixel CMOS AF technology provides users with fast and accurate AF using 3869 manually selectable AF positions and 525 automatic areas. In Live View shooting, the EOS-1D X Mark III's AF system supports face, head and, most noteworthy, eye detection AF tracking. Eye detection AF provides high-precision tracking by locking in on and following the eye of a moving subject. When in Live View AF/AE tracking is supported during high-speed burst shooting with the ability to capture up to 20 fps in both RAW and RAW + JPEG file format.

Using the traditional optical viewfinder, the camera has the ability to capture up to an extraordinary 16 fps with reduced time lag and image blackout. Reducing lag and image blackout greatly increases a photographer's ability to track moving subjects and never miss a shot. Regardless of the method of shooting through the OVF or LCD, the EOS-1D X Mark III can shoot over 1000 images in a burst using the dual CFexpress cards.

To support the needs of top professionals, the camera's communications functions have been greatly enhanced. Incorporating a dedicated Network tab in the menu, the photographer can much more easily set up network functions such as connections via built-in gigabit Ethernet, Wi-Fi® connectivity, Bluetooth connectivity and destinations such as FTP servers, EOS Utility, or Browser Remote functions. It will even support encrypted network authentication for advanced network users.

Thoughts from the First Users

"I can't say enough good things about how well the EOS-1D X Mark III camera performed on so many levels. The new AF system is a game-changer for me, I was totally blown away by how well it performed in various situations, including very low-light levels," said wildlife photographer and Canon Explorer of Light Adam Jones. "The ability to move the AF point quickly with the new sensor-based AF button was simply amazing; the focus followed the subject like nothing before. As a wildlife photographer, I never dreamed we would have a camera that could follow focus on fast-flying snow geese using a super-telephoto lens with 1.4x and 2x converters - but with the new camera here we are!"

"My job is to travel the world to photograph automobile racing and car culture in the harshest conditions imaginable. Racetracks, salt flats, sand dunes, frozen lakes, you name it, I photograph all things four wheels. That is why I need a camera that works as hard as we do," said automotive photographer Larry Chen. "I started my professional career on the EOS-1D series of bodies, and I've had several over the years with over one million images captured. The EOS-1D X Mark III really is the next generation of professional cameras in a familiar package, the first words out of my mouth after shooting with it were 'There are no more excuses, to miss a shot!' I can't wait to use it for the 2020 racing season!"

Additional Features of the Canon EOS-1D X Mark III DSLR Camera Include:

• Enhanced operational controls including button illumination, Touch AF and a multi-controller allowing users to select the desired AF point more easily
• Face-Priority E-TTL II metering enables the camera to automatically adjust to provide the appropriate output of an external flash when it detects a face
• Digital Lens Optimizer helps to correct against any potential lens diffraction or aberration based on the design of each individual lens. DLO also improves the overall resolution of an image
• Ability to capture stills in 10-bit using the HEIF (High-Efficiency Image File) file format. HEIF produces a wider dynamic range and greater color representation compared to 8-bit JPEG
• Built-in Wi-Fi®[iv], Bluetooth®[v], and GPS[vi] Technology
• Faster speed and improved user interface for networking with optional Wireless File Transmitter WFT-E9 or with the built-in gigabit ethernet port
• Canon EOS-1D series level of durability including dust-and-weather- resistance

Price and Availability

The Canon EOS-1D X Mark III DSLR camera body and WFT-E9 wireless file transmitter are both scheduled to be available in mid-February 2020 for an estimated retail price of $6,499.00 and $649.99, respectively*. For more information, please visit, usa.canon.com.

Some photos

Adorama will give up to $2500 USD for your Canon EOS-1D X Mark II (condition dependent) and up to $1250 USD for your Canon EOS 5D Mark IV.

https://www.adorama.com/pages/usedQuote

DR