Sony Alpha7R III ILCE-7RM3 vs. Sony Alpha6400 ILCE-6400

Camera Comparison, Reviews and Tests

Side by side comparison and review of Sony Alpha7R III ILCE-7RM3 and Sony Alpha6400 ILCE-6400. Compare design, sensors, zoom functions, batteries and other key specifications and features to simplify the choice of your perfect digital camera. Our goal is to make it easier for you to decide on the camera that will best meet your expectations by revealing the main differences between the products.

Camera Specifications Comparison

Sony Alpha7R III ILCE-7RM3 vs. Sony Alpha6400 ILCE-6400 Comparison Chart
DESIGN AND DIMENSIONS Sony Alpha7R III ILCE-7RM3 Sony Alpha6400 ILCE-6400
Product Type Digital camera - 4K - mirrorless system Digital camera - 4K - mirrorless system
Lens Included Body only Body only
Height 9.56 cm 6.69 cm
Width 12.69 cm 12 cm
Depth 7.37 cm 4.99 cm
Weight 572 g 359 g
Weight Details Camera body only: 572 g
Camera with battery and memory card: 675 g
Camera body only: 359 g
Camera with battery and memory card: 403 g
Body Material Magnesium alloy Magnesium alloy
Enclosure Colour Black Black
Protection Dust-resistant, moisture-resistant -
Digital Zoom 4x 4x
SENSOR Sony Alpha7R III ILCE-7RM3 Sony Alpha6400 ILCE-6400
Sensor Resolution 42.4 Megapixel 24.2 Megapixel
Optical Sensor Type Exmor R CMOS Exmor CMOS
Total Pixels 43,600,000 pixels 25,000,000 pixels
Effective Sensor Resolution 42,400,000 pixels 24,200,000 pixels
Optical Sensor Size Full Frame (35.9 x 24 mm) APS-C (23.5 x 15.6 mm)
Frame Rate (Max Resolution) 30 fps 30 fps
Sensor Dust Reduction Yes Yes
Sensor Features Dust Reduction (image sensor vibration), Anti-Dust coating Dust Reduction (image sensor vibration), Anti-Dust coating
Image Stabiliser Optical (5-axis Steady Shot) -
Built-in Optical Image Stabiliser Yes -
Sensors Digital level metre -
PROCESSOR Sony Alpha7R III ILCE-7RM3 Sony Alpha6400 ILCE-6400
Image Processor BIONZ X BIONZ X
LENS Sony Alpha7R III ILCE-7RM3 Sony Alpha6400 ILCE-6400
Lens Mounting Type Sony E-mount Sony E-mount
FOCUSING Sony Alpha7R III ILCE-7RM3 Sony Alpha6400 ILCE-6400
Auto Focus TTL contrast and phase detection TTL contrast and phase detection
Auto Focus Points (Zones) Qty 399 425
Auto Focus Features Focus Peaking function, Predictive Focus Control Focus Peaking function, 4D FOCUS system
AE/AF Control Flex Focus Point, Eye detection AF, Zone AF Eye detection AF, Predictive AI Servo AF, Real-time Eye AF, Real-time Tracking AF
Face Detection Eye Detect AF, face-priority AF function Yes
VIEWFINDER Sony Alpha7R III ILCE-7RM3 Sony Alpha6400 ILCE-6400
Viewfinder Type Electronic - OLED Electronic - OLED
Viewfinder Colour Support Colour Colour
Viewfinder Diagonal Size 0.5" 0.39"
Viewfinder Resolution 3,686,400 pixels 2,359,296 pixels
Optical Viewfinder Field Coverage 100% -
Optical Viewfinder Magnification 0.78x 1.07x
Optical Viewfinder Dioptric Correction Range -4 to +3 -
Field of View Crop Factor - 1.5
Features Viewfinder brightness control, colour temperature control Auto eye sensor
EXPOSURE & WHITE BALANCE Sony Alpha7R III ILCE-7RM3 Sony Alpha6400 ILCE-6400
ISO (Max) 102400 102400
Native ISO - 100-32000
Extended ISO (Max) - 102400
Light Sensitivity ISO 50, ISO 102400, ISO auto (100-12800), ISO 100-32000 ISO auto (100-6400), ISO 100-32000
Exposure Metering Multi-segment, centre-weighted, spot Multi-segment, centre-weighted, spot
Exposure Metering Zones 1200 1200
Exposure Modes Bulb, automatic, manual, aperture-priority, shutter-priority Programme, bulb, automatic, manual, aperture-priority, shutter-priority
Bracketing Modes Dynamic Range Bracketing, white balance bracketing Flash Exposure Bracketing, white balance bracketing
Shooting Programs - Landscape, portrait mode, macro, night portrait, night scene, sports mode, sunset, handheld twilight, anti-motion blur
Special Effects Black & White, Sepia, Neutral, Vivid, sunset, landscape, portrait, clear, deep, light, autumn leaves, Retro, partial colour, Toy camera, Posterisation, High contrast monochrome, Pop Colour, Soft High-key, Night Scene, Standard, Style Box, Posterisation (B/W) Black & White, Sepia, Neutral, Vivid, sunset, soft focus, illustration, landscape, portrait, Water Colour, miniature, clear, deep, light, autumn leaves, Retro, partial colour, Toy camera, Posterisation, High contrast monochrome, Pop Colour, HDR Painting, Rich-tone monochrome, Soft High-key, Night Scene, Standard, Style Box
White Balance Custom, automatic, presets Custom, automatic, presets
White Balance Presets Incandescent, cloudy, Flash, daylight, shade, fluorescent light (cool white), fluorescent light (daylight), fluorescent light (warm white), Underwater, 2500K - 9900K, fluorescent light (daylight white) Incandescent, cloudy, Flash, daylight, shade, fluorescent light (cool white), fluorescent light (daylight), fluorescent light (warm white), Underwater, 2500K - 9900K, fluorescent light (daylight white)
Shutter Type - Mechanical, electronic
Max Shutter Speed 1/8000 sec 1/4000 sec
Min Shutter Speed 30 sec 30 sec
Exposure Compensation ±5 EV range, in 1/2 or 1/3 EV steps ±5 EV range, in 1/2 or 1/3 EV steps
Auto Exposure Bracketing 3, 5, 9 steps in 1/3, 1/2, 2/3, 1, 2 or 3 EV steps 3, 5 steps in 1/3, 1/2, 2/3, 1, 2 or 3 EV steps, 9 steps in 1/3, 1/2, 2/3 or 1 EV steps
White Balance Bracketing Yes Yes
X-sync Speed 1/250sec 1/160 sec
Exposure Range EV -3-20 (ISO 100) EV -2-20 (ISO 100)
DISPLAY Sony Alpha7R III ILCE-7RM3 Sony Alpha6400 ILCE-6400
Type 3" LCD display 3" LCD display
Touch Screen Yes Yes
Display Format 1,440,000 pixels 921,600 pixels
Display Form Factor Folding Tilting
Display Features Display brightness control, Peaking AF display, Touch AF Display brightness control, display colour control, display contrast control
FLASH Sony Alpha7R III ILCE-7RM3 Sony Alpha6400 ILCE-6400
Camera Flash - Pop-up flash
Guide Number (m / ISO 100) - 6
Flash Modes - Fill-in mode, rear curtain sync, slow synchro, auto mode, flash OFF mode, red-eye reduction, high-speed sync
Red-Eye Reduction - Yes
Features AF illuminator AF illuminator, flash +/- compensation, wireless off-camera control
VIDEOGRAPHY / CAMCORDER Sony Alpha7R III ILCE-7RM3 Sony Alpha6400 ILCE-6400
Digital Video Format AVCHD, XAVC S AVCHD, XAVC S
Image Recording Format JPEG, RAW, RAW + JPEG JPEG, RAW, RAW + JPEG
Max Video Resolution 3840 x 2160 3840 x 2160
Audio Signal Format Dolby Digital AC-3 (2 channel), Linear PCM -
Surround Sound - Dolby Digital AC-3 (2 channel) recording
Microphone Operation Mode Stereo Stereo
MEMORY Sony Alpha7R III ILCE-7RM3 Sony Alpha6400 ILCE-6400
Memory Card Slot Memory Stick PRO Duo card, SD card Memory Stick PRO Duo card, SD card
Supported Memory Cards SD Memory Card, Memory Stick PRO Duo, SDXC Memory Card, SDHC Memory Card, Memory Stick PRO-HG Duo, SDHC UHS-I Memory Card, SDXC UHS-I Memory Card, SDHC UHS-II Memory Card, SDXC UHS-II Memory Card SD Memory Card, Memory Stick PRO Duo, SDXC Memory Card, SDHC Memory Card, Memory Stick PRO-HG Duo, Memory Stick Micro Mark2, SDHC UHS-I Memory Card, SDXC UHS-I Memory Card
Memory Card Included No No
Image Storage 7952 x 5304
7952 x 4472
5168 x 3448
5168 x 2912
3984 x 2656
3984 x 2240
2592 x 1728
2592 x 1456
6000 x 4000
6000 x 3376
4240 x 2832
4240 x 2400
3008 x 2000
3008 x 1688
4000 x 4000
2832 x 2832
2000 x 2000
Video Capture AVCHD - 1920 x 1080 i - 60 fps - 24Mbps
AVCHD - 1920 x 1080 i - 60 fps - 17Mbps
AVCHD - 1920 x 1080 i - 50 fps - 24Mbps
AVCHD - 1920 x 1080 i - 50 fps - 17Mbps
XAVC S - 3840 x 2160 p - 30 fps - 100Mbps
XAVC S - 3840 x 2160 p - 24 fps - 100Mbps
XAVC S - 3840 x 2160 p - 30 fps - 60Mbps
XAVC S - 3840 x 2160 p - 24 fps - 60Mbps
XAVC S - 1920 x 1080 p - 60 fps - 100Mbps
XAVC S - 1920 x 1080 p - 120 fps - 60Mbps
XAVC S - 1920 x 1080 p - 60 fps - 50Mbps
XAVC S - 1920 x 1080 p - 30 fps - 50Mbps
XAVC S - 1920 x 1080 p - 24 fps - 50Mbps
XAVC S - 1920 x 1080 p - 60 fps - 25Mbps
XAVC S - 1920 x 1080 p - 30 fps - 16Mbps
XAVC S - 3840 x 2160 p - 25 fps - 100Mbps
XAVC S - 3840 x 2160 p - 25 fps - 60Mbps
XAVC S - 1920 x 1080 p - 100 fps - 100Mbps
XAVC S - 1920 x 1080 p - 100 fps - 60Mbps
XAVC S - 1920 x 1080 p - 50 fps - 50Mbps
XAVC S - 1920 x 1080 p - 25 fps - 50Mbps
XAVC S - 1920 x 1080 p - 50 fps - 25Mbps
XAVC S - 1920 x 1080 p - 25 fps - 16Mbps
XAVC S - 3840 x 2160 p - 30 fps - 100Mbps
XAVC S - 3840 x 2160 p - 25 fps - 100Mbps
XAVC S - 3840 x 2160 p - 24 fps - 100Mbps
XAVC S - 3840 x 2160 p - 30 fps - 60Mbps
XAVC S - 3840 x 2160 p - 25 fps - 60Mbps
XAVC S - 3840 x 2160 p - 24 fps - 60Mbps
XAVC S HD - 1920 x 1080 p - 120 fps - 100Mbps
XAVC S HD - 1920 x 1080 p - 100 fps - 100Mbps
XAVC S HD - 1920 x 1080 p - 120 fps - 60Mbps
XAVC S HD - 1920 x 1080 p - 100 fps - 60Mbps
XAVC S HD - 1920 x 1080 p - 60 fps - 50Mbps
XAVC S HD - 1920 x 1080 p - 50 fps - 50Mbps
XAVC S HD - 1920 x 1080 p - 30 fps - 50Mbps
XAVC S HD - 1920 x 1080 p - 25 fps - 50Mbps
XAVC S HD - 1920 x 1080 p - 24 fps - 50Mbps
XAVC S HD - 1920 x 1080 p - 60 fps - 25Mbps
XAVC S HD - 1920 x 1080 p - 50 fps - 25Mbps
XAVC S HD - 1920 x 1080 p - 30 fps - 16Mbps
XAVC S HD - 1920 x 1080 p - 25 fps - 16Mbps
AVCHD - 1920 x 1080 i - 60 fps - 24Mbps
AVCHD - 1920 x 1080 i - 50 fps - 24Mbps
AVCHD - 1920 x 1080 i - 60 fps - 17Mbps
AVCHD - 1920 x 1080 i - 50 fps - 17Mbps
BATTERY AND CHARGING Sony Alpha7R III ILCE-7RM3 Sony Alpha6400 ILCE-6400
Battery Type Sony NP-FZ100 Lithium Ion Sony NP-FW50 Lithium Ion
Details Sony NP-FZ100 Li-ion rechargeable battery - 2280 mAh (included) Sony NP-FW50 Li-ion rechargeable battery - 1080 mAh (included)
Battery Life Photo shooting - 650 shots (LCD Monitor on)
Photo shooting - 530 shots (EVF on)
Video recording - 1.92 hours (LCD Monitor on)
Video recording - 1.67 hours (EVF on)
Photo shooting - 360 shots (EVF on)
Photo shooting - 410 shots (LCD Monitor on)
Video recording - 70 minutes (EVF on)
Video recording - 75 minutes (LCD Monitor on)
CONNECTIONS Sony Alpha7R III ILCE-7RM3 Sony Alpha6400 ILCE-6400
Interface HDMI, USB 2.0, USB-C, IEEE 802.11b/g/n, NFC (Near Field Communication), Bluetooth 4.1 HDMI, USB 2.0, IEEE 802.11b/g/n, NFC (Near Field Communication), Bluetooth 4.1
Connectivity Features Remote live view Remote control via mobile devices, remote live view
Print Standard DPOF support, Exif Print support, PRINT Image Matching DPOF support, Exif Print support, PRINT Image Matching
Computer Connectivity - Mac, Windows
Flash Terminal Hot shoe, PC terminal Hot shoe
Connector Type USB 2.0 (5 pin Micro-USB Type B)
USB 3.1 (USB Type-C)
HDMI output (19 pin micro HDMI Type D)
Microphone (mini-phone stereo 3.5 mm)
Headphones (mini-phone stereo 3.5 mm)
USB 2.0
HDMI output (19 pin micro HDMI Type D)
Microphone (mini-phone stereo 3.5 mm)
FEATURES Sony Alpha7R III ILCE-7RM3 Sony Alpha6400 ILCE-6400
Self-Timer Delay 10 sec, 2sec, 5 sec 10 sec, 2sec, 5 sec
Continuous Shooting Speed 8 frames per second, 3 frames per second, 10 frames per second, 6 frames per second 8 frames per second, 3 frames per second, 6 frames per second, 11 frames per second
HDR Mode HDR Movie mode HDR Movie mode
Additional Features Built-in speaker, sharpness control, camera orientation detection, histogram display, saturation control, contrast control, Dynamic Range Optimizer, USB charging, built-in help guide, Dolby Digital Stereo Creator, x.v.Colour technology, HDR image enhancement technology, Clear Image Zoom, noise reduction over long exposures, Lens Distortion Correction, silent shooting, GPS via mobile, S-Log2 gamma setting, Pixel Shift Resolution technology, peripheral shading correction, chromatic aberration correction, anti-flicker, Hybrid Log-Gamma (HLG) recording, S-Log3 gamma setting Built-in speaker, RGB primary colour filter, AE lock, AF lock, FE lock, Sweep Panorama technology, USB powered, Dynamic Range Optimizer, USB charging, peripheral illumination correction, Chromatic Aberration Compensation (CAC), Intelligent AUTO (iAUTO), High ISO NR, high-speed recording, Time-Lapse recording, Superior Auto mode, noise reduction over long exposures, Lens Distortion Correction, slow motion recording
OTHERS Sony Alpha7R III ILCE-7RM3 Sony Alpha6400 ILCE-6400
Included Accessories Eyepiece cover, battery charger, body cap, shoulder strap, shoe cap, cable protector, USB-C cable Eyepiece cover, body cap, shoulder strap, shoe cap, micro-USB cable
Max Operating Temperature 40 °C 40 °C
Min Operating Temperature 0 °C 0 °C
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