Review

Recording video with the 5D Mark IV is very simple once the camera has been set to video recording mode. This is also where Canon has an advantage with their dual-pixel technology, which lets you shoot action with outstanding continuous AF for sharper, easier to watch movies. The dual-pixel technology also allows you to change AF points with just a touch of the LCD screen, providing a smooth and accurate (adjustable) transition between the two. Options for 4K and Full 1080p HD video are available, both with outstanding quality. 4K shooting will require a USH-II speed memory card, allowing it to write at least 250mb/s to keep up with the high capacity videos.

http://www.steves-digicams.com/camera-reviews/canon/eos-5d-mark-iv/canon-eos-5d-mark-iv-dslr-review.html

EOS 5D Mark IV Body Refurbished, $2799

https://shop.usa.canon.com/shop/en/catalog/eos-5d-mark-iv-body-refurbished

New firmware will come only in February 2018 for reasons related to firmware preparation. We would like to offer our sincere apologies to users of this product who have been inconvenienced.

In the firmware to enhance functions of the EOS 5D Mark IV, we are planning to incorporate the following enhancements:

• Support will be added for chromatic aberration correction, peripheral illumination correction, distortion correction, and Digital Lens Optimizer when using Digital Photo Professional to process RAW images captured with the following TS-E lenses: TS-E 17mm f/4L, TS-E 24mm f/3.5L II, TS-E 50mm f/2.8L MACRO, TS-E 90mm f/2.8L MACRO, or TS-E 135mm f/4L MACRO.
• Support will be added to fix a phenomenon* in which standard exposure may not be obtained, or an irregular exposure may result, when Silent LV (Live View) shooting with the following TS-E lenses: TS-E 50mm f/2.8L MACRO, TS-E 90mm f/2.8L MACRO, or TS-E 135mm f/4L MACRO.
• Support for Exif 2.31 will be added.

New firmware coming later

Upadate:

On February 6, 2018 we revised the availability of future Firmware from late February to a late March 2018 release.

The original advisory content is provided below.

Release of the new EOS 5D Mark IV Firmware which was originally scheduled to be available on November 29, 2017, at the same time as the firmware updates for six other models (EOS-1D X Mark II: Ver. 1.1.4; EOS-1D X: Ver.2.1.0; EOS 5D Mark III: Ver.1.3.5; EOS 5DS: Ver.1.1.2; EOS 5DS R: Ver.1.1.2; EOS 6D Ver. 1.1.8), has been postponed until late February 2018. We would like to offer our sincere apologies to users of this product who have been inconvenienced.

The new EOS 5D Mark IV Firmware will incorporate the following fixes and enhancements:

1. Support will be added for chromatic aberration correction, peripheral illumination correction, distortion correction, and Digital Lens Optimizer when using Digital Photo Professional to process RAW images captured with the following TS-E lenses: TS-E 17mm f/4L, TS-E 24mm f/3.5L II, TS-E 50mm f/2.8L MACRO, TS-E 90mm f/2.8L MACRO, or TS-E 135mm f/4L MACRO.
2. Fixes a phenomenon* in which standard exposure may not be obtained, or an irregular exposure may result, when Silent LV (Live View) shooting with the following TS-E lenses: TS-E 50mm f/2.8L MACRO, TS-E 90mm f/2.8L MACRO, or TS-E 135mm f/4L MACRO.
3. Support for Exif 2.31 will be added.*This phenomenon occurs when tilt or shift is applied on a TS-E lens (TS-E 50mm f/2.8L MACRO, TS-E 90mm f/2.8L MACRO, or TS-E 135mm f/4L MACRO) during LV shooting when Silent LV shooting is selected (set to Mode 1 or Mode 2 on the menu). Until the new firmware is available, when performing viewfinder shooting or LV shooting, please shoot with the Silent LV shooting set to [Disable].

Canon also started to charge for Log

A major upgrade service for the EOS 5D Mark IV has been announced by Canon Europe this week, which sees Canon Log being added to the DSLR providing enhanced dynamic range and easier colour grading...

Canon Log is a staple feature in Canon’s Cinema EOS range and is designed to deliver an 800 percent increase in dynamic range, minimising the loss of detail in the darkest and brightest parts of the image. When using Canon Log on the EOS 5D Mark IV, an ISO setting of 400 will deliver the largest dynamic range of 12 stops, perfect for shooting in difficult lighting conditions.

Ensuring maximum freedom in post-production, Canon Log alters the image processing data after the image has been captured. As a result, videographers and filmmakers will find it easy to colour match with footage shot on other cameras, including those in the Canon Cinema EOS range. The footage from any camera can be combined and colour matched in a single colour grading process, which provides a final global colour and seamless feel, regardless of whether the film is shot on different cameras.

Canon Log also reduces noise, particularly in shadow areas that can appear during colour grading. The new upgrade service makes the colour grading of footage more flexible via the production of accurate colours with minor colour bias.

Canon Log will be available as a chargeable upgrade service exclusively via Canon authorised service centres

Canon EOS 5D Mark IV DSLR Camera Body with Inkjet Printer Kit for $3125 after rebate

https://www.bhphotovideo.com/c/product/1342083-REG/canon_eos_5d_mark_iv.html

https://www.imaging-resource.com/PRODS/canon-5d-iv/canon-5d-ivVIDEO.HTM

Canon EOS 5D Mark IV Digital SLR Camera for $2259

https://www.ebay.com/itm/Canon-EOS-5D-Mark-IV-Digital-SLR-Camera-Body-Only/323086614873

Canon EOS 5D Mark IV DSLR Body With Free Mac Accessory Bundle, $2499

https://www.adorama.com/ica5dm4am.html

Canon EOS 5D Mark IV firmware 1.3.0

• Enables NFC connection with smartphones running Android 10 operating system. *For Android running v6.0 or later, use Camera Connect v2.7.10 or later. For Android running v5.0 or older, use a connection method other than NFC.
• Enables support for the .CR2 image file format on image.canon.
• Fixes a phenomenon in which some camera operations may not be possible or an error may occur after an insufficient flash output is produced when shooting with the flash.

https://www.usa.canon.com/internet/portal/us/home/support/details/cameras/eos-dslr-and-mirrorless-cameras/dslr/eos-5d-mark-iv/eos-5d-mark-iv?subtab=downloads-firmware