A few hours before the announcement the full list of Canon EOS R5 specifications leaked over the web.

Canon EOS R5 specifications:

Compatible Lenses
Canon RF lens group (excluding EF, EF-S and EF-M lenses)
When using Mount Adapter EF-EOS R: Canon EF or EF-S lenses (excluding EF-M lenses)

Lens Mount
Canon RF mount

Sensor Type
CMOS sensor (compatible with Dual Pixel CMOS AF)

Effective Pixels
Approx. 45.0 megapixels

Sensor Size
Approx. 36.0 x 24.0 mm

Pixel Size
Approx. 4.40 micro m square

Total Pixels
Approx. 47.1 megapixels

Aspect Ratio
3:2 (Horizontal: Vertical)

Color Filter System
RGB primary color filters

Low Pass Filter
Installed in front of the image sensor, non-detachable..

Recording Format
Compliant to Design rule for Camera File system 2.0 and Exif 2.3

Image Format
JPEG, HEIF, RAW (CR3, 14 bit RAW format), C-RAW (Canon original); Movies: ALL-I, IPB, RAW

Image Processor DIGIC X

Viewfinder Type
OLED color electronic viewfinder; approx. 5.76 million dots resolution

Coverage
Approx. 100% vertically and horizontally relative to the shooting image area (with image quality L, at approx. 23mm eyepoint).

Magnification / Angle of View
Approx. 0.76x / Approx. 35.5 degrees (with 50mm lens at infinity, -1 m)

Eye Point
Approx. 23mm (at -1 m from the eyepiece lens end)

Dioptric Adjustment Range
Approx. -4.0 to + 2.0 m (dpt)

Focus Method
Dual Pixel CMOS AF

Shutter Type

Electronically controlled focal-plane shutter Electronic first curtain or mechanical shutter Electronic shutter

Shutter Speeds
When [Mechanical] or [Elec. 1st- curtain] is set: 1/8000-30 sec, bulb When [Electronic] is set: 1/8000-0.5 sec.

X-sync Speed
Mechanical Shutter: 1/200 sec. Elec. 1st-curtain: 1/250 sec.

Shutter Release
Soft-touch electromagnetic release

Self Timer
10-sec. delay, 2-sec. delay

Monitor Type
TFT color, liquid-crystal monitor

Monitor Size
3.2-inch (screen aspect ratio of 3:2)
3.15 in./8.01cm diagonal (2.63 in./6.67cm width, 1.75 in./4.44cm height)

Dots
Approx. 2.1 million dots

Coverage
Approx. 100% vertically/horizontally

Brightness Control
Manually adjustable to one of seven brightness levels

Coating
Clear View LCD II

Anti-smudge coating applied.

Anti-reflection coating not applied. Interface Languages

29 (English, German, French, Dutch, Danish, Portuguese, Finnish, Italian, Ukraine, Norwegian, Swedish, Spanish, Greek, Russian, Polish, Czech, Hungarian, Vietnamese, Hindi, Romanian, Turkish, Arabic, Thai, Simplified/Traditional Chinese, Korean, Malay, Indonesian, Japanese)

Standards Compliance
IEEE 802.11a/ac/b/g/n

Transmission Method
DS-SS modulation (IEEE 802.11b)
OFDM modulation (IEEE 802.11g/n/a/ac)

Transition Frequency (Central Frequency) 2.4 GHz band

Frequency: 2412 to 2462 MHz Channels: 1 to 11 channels

5 GHz band
Frequency: 5180 to 5825 MHz Channels: 36 to 165 channels

Recording Media CFexpress card:

Type B: Card slot
SD card speed class-compatible.

SD card:
Compatible with UHS-II
Eye-Fi cards and Multimedia cards (MMC) are not supported.

Working Temperature Range 0 to +40 Degree C

Working Humidity Range 85% or less

Dimensions (W x H x D)
Approx. 138 x 97.5 x 88mm

Weight
Approx. 738g (including battery, SD memory card; without body cap) Approx. 650g (body only; without battery, card or body cap)