how would the lens adapter factor on the focal length ?

A mirrorless camera has a much shorter "flange focal length" (the distance between the rear lens element and the camera sensor) than a DSLR. Flange focal length on RF mount lens is 20mm, versus EF mount which is 44mm. So the adapter just puts the flange focal length back to what it would be on a DSLR. In short, the focal length of the lens (adapted EF or EF-S lens) does not change. A 50mm lens is still 50mm.

what is the continuous recording time limit with video? 29 mins?

Anything that records 30+ mins is subject to higher customs/import tax, so many cameras stay under that deliberately.

Can this camera operate while being charged via an external battery or power bank, and can it tether that battery pack to be used while charging?

I have never had to use it while charging. I have 1 Canon battery and 2 non Canon batteries so take at least one extra with me when I'm out. I did take 300+ photos the other day and didn't have to change batteries. I haven't used the camera for video yey.

CanonEOS R, Vlogging and Content Creator Camera 4K UHD, Digital Single-Lens Non-Reflex AF/AE, 0.76 Magnification, OLED Color Electronic Viewfinder, CMOS Sensor, Mirrorless, Full-Frame (Body Only)

CanonEOS R, Vlogging and Content Creator Camera 4K UHD, Digital Single-Lens Non-Reflex AF/AE, 0.76 Magnification, OLED Color Electronic Viewfinder, CMOS Sensor, Mirrorless, Full-Frame (Body Only)

Product ID: 78260393

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Details

Compatible Mountings
Canon EF
Aspect Ratio
Unknown
Photo Sensor Technology
CMOS
Supported File Format
JPEG Raw
Image Stabilization
true
Maximum Focal Length
50 Millimeters

⚡12fps High-Speed Continuous Shooting

📸30.3MP Full-Frame CMOS Sensor

🔍5,655 Dual Pixel CMOS AF Points

Description

🚀 Elevate Your Visual Storytelling with CanonEOS R – Where Precision Meets Power

LIGHTNING FAST FOCUS - Lock onto your subject in just 0.05 seconds with 5,655 manually selectable autofocus points—never miss a moment.
UNMATCHED CLARITY DETAIL - Capture stunning 30.3MP full-frame images and 4K UHD videos that make your content pop.
SEAMLESS LENS COMPATIBILITY - Effortlessly switch between RF, EF, and EF-S lenses with optional adapters for ultimate creative freedom.
PRO LEVEL CONTROL ZERO NOISE - Silent electronic shutter and flexible priority modes let you shoot discreetly and creatively in any environment.
LIGHTWEIGHT DURABILITY ON THE GO - Compact magnesium alloy body designed for professionals who demand portability without sacrificing toughness.

The CanonEOS R is a professional-grade mirrorless camera featuring a 30.3MP full-frame CMOS sensor and DIGIC 8 processor for ultra-high-resolution photos and 4K UHD video. It boasts an advanced Dual Pixel CMOS AF system with 5,655 selectable focus points and rapid 0.05-second autofocus, perfect for dynamic shooting. Compatible with RF, EF, and EF-S lenses, it offers versatile creative options. The camera’s lightweight magnesium alloy body ensures durability and portability, while silent electronic shutter and flexible exposure modes provide professional control in any setting.

Specifications

Connectivity Technology	Bluetooth, HDMI
Wireless Technology	BuiltIn; 802.11b/g/n + Bluetooth 4.1 LE
Video Output	Mini-HDMI
Total USB 2.0 Ports	1
Total USB Ports	1
Total Video Out Ports	1
Shooting Modes	Scene Intelligent Auto, Flexible priority AE, Program AE, Shutter priority AE, Aperture priority AE, Manual, Bulb and Custom (x3). Movie: Scene Intelligent Auto, Program AE, Shutter priority AE, Aperture priority AE, Manual, Bulb and Custom (x3)
Digital-Still	Yes
Movie Mode	Yes
Image Capture Type	Stills & Video
Night vision	No
Auto Focus Technology	Manual, Automatic
Focus Type	automatic_only
Focus Mode	Manual Focus (MF), Continuous-Servo AF (AF-C), Single-Servo AF (AF-S)
Autofocus	Yes
Aspect Ratio	Unknown
File Format	JPEG, Raw
Effective Still Resolution	30.3 MP
JPEG Quality Level	Fine, Normal
Supported Image Format	JPEG, RAW
Bit Depth	14 Bit
Maximum Focal Length	50 Millimeters
Lens Type	Wide Angle
Zoom	Digital Zoom
Real Angle Of View	0.08 Degrees
Digital Zoom	10 x
Lens Construction	>10
Metering Methods	average,center-weighted,multi-zone,partial,spot
Exposure Control	manual-and-automatic
White Balance Settings	Auto, Daylight, Color Temperature, Tungsten, Fluorescent, Custom, Cloudy, Flash torch, Shade
Self Timer	10 seconds
Screen Size	3.15 Inches
Display Type	LCD
Display Fixture Type	Articulating
Touch Screen Type	Capacitive
Display Resolution Maximum	2100000
Has Color Screen	Yes
Flash Memory Type	SDXC
Memory Slots Available	1
Memory Storage Capacity	128 GB
Recording Capacity	30 minutes
Flash Memory Installed Size	128 GB
Compatible Mountings	Canon EF
Sensor Type	CMOS
Image stabilization	true
Photo Sensor Resolution	30.3 MP
Photo Sensor Size	Full Frame (35mm)
Maximum Shutter Speed	1/8000 seconds
Minimum Shutter Speed	30 seconds
Form Factor	Mirrorless
Special Feature	Shockproof, Temperature Extremes, Waterproof, X-Ray Proof
Color	Black
Item Weight	1.5 Pounds
Video Resolution	4K UHD 2160p
Viewfinder	Electronic
Flash Modes	eTTL
Camera Flash	Hotshoe
Skill Level	Professional
Specific Uses For Product	Photography, Videography
Compatible Devices	Canon EF
Continuous Shooting	8
Viewfinder Magnification	0.71x
Video Capture Format	4k
Battery Weight	79.4 Grams
Delay between shots	0.08 seconds
Audio Output Type	Bluetooth
Battery Cell Type	Lithium Ion
Battery Type	2 x Battery Pack (LP-E6/LP-E6N))
Water Resistance Level	Water Resistant
Frame Rate	24 or 30 fps
Battery Capacity	16.2 Watt Hours
Mount Type	Bayonet