Pentax K-1 vs. Sony Alpha7R III ILCE-7RM3

Camera Comparison, Reviews and Tests

In depth comparison and review of Pentax K-1 and Sony Alpha7R III ILCE-7RM3. Compare design, sensors, proximity features, memory capacities and other important specifications and features to easily choose the right camera for you. Our goal is to help you uncover differences between the products and find the digital camera that will best fit your needs.

Camera Specifications Comparison

Pentax K-1 vs. Sony Alpha7R III ILCE-7RM3 Comparison Chart
DESIGN AND DIMENSIONS Pentax K-1 Sony Alpha7R III ILCE-7RM3
Product Type Digital camera - 1080p - SLR with Live View mode, movie recording Digital camera - 4K - mirrorless system
Lens Included Body only Body only
Height 11 cm 9.56 cm
Width 13.65 cm 12.69 cm
Depth 8.55 cm 7.37 cm
Weight 925 g 572 g
Weight Details - Camera body only: 572 g
Camera with battery and memory card: 675 g
Body Material - Magnesium alloy
Enclosure Colour - Black
Protection Weatherproof, freezeproof, dust-resistant Dust-resistant, moisture-resistant
Digital Zoom - 4x
Navigation GPS receiver -
SENSOR Pentax K-1 Sony Alpha7R III ILCE-7RM3
Sensor Resolution 36.4 Megapixel 42.4 Megapixel
Optical Sensor Type CMOS Exmor R CMOS
Total Pixels 36,770,000 pixels 43,600,000 pixels
Effective Sensor Resolution 36,400,000 pixels 42,400,000 pixels
Optical Sensor Size Full Frame (35.9 x 24.0 mm) Full Frame (35.9 x 24 mm)
Frame Rate (Max Resolution) 30 fps 30 fps
Sensor Dust Reduction - Yes
Sensor Features - Dust Reduction (image sensor vibration), Anti-Dust coating
Image Stabiliser Optical (5-axis image sensor shift mechanism) Optical (5-axis Steady Shot)
Built-in Optical Image Stabiliser Yes Yes
Sensors Magnetometer, digital level metre Digital level metre
PROCESSOR Pentax K-1 Sony Alpha7R III ILCE-7RM3
Image Processor PRIME IV BIONZ X
LENS Pentax K-1 Sony Alpha7R III ILCE-7RM3
Lens Mounting Type Pentax KAF2 Sony E-mount
FOCUSING Pentax K-1 Sony Alpha7R III ILCE-7RM3
Auto Focus TTL contrast and phase detection TTL contrast and phase detection
Auto Focus Points (Zones) Qty 33 399
Auto Focus Features - Focus Peaking function, Predictive Focus Control
AE/AF Control - Flex Focus Point, Eye detection AF, Zone AF
Face Detection - Eye Detect AF, face-priority AF function
VIEWFINDER Pentax K-1 Sony Alpha7R III ILCE-7RM3
Viewfinder Type Optical - fixed eye-level pentaprism Electronic - OLED
Viewfinder Colour Support - Colour
Viewfinder Diagonal Size - 0.5"
Viewfinder Resolution - 3,686,400 pixels
Optical Viewfinder Field Coverage 100% 100%
Optical Viewfinder Magnification 0.70x 0.78x
Optical Viewfinder Dioptric Correction Range -3 to +1.2 -4 to +3
Features - Viewfinder brightness control, colour temperature control
EXPOSURE & WHITE BALANCE Pentax K-1 Sony Alpha7R III ILCE-7RM3
ISO (Max) 204800 102400
Native ISO 100-204800 -
Light Sensitivity ISO auto, ISO 100-204800 ISO 50, ISO 102400, ISO auto (100-12800), ISO 100-32000
Exposure Metering Multi-segment, centre-weighted, spot Multi-segment, centre-weighted, spot
Exposure Metering Zones - 1200
Exposure Modes Programme, bulb, automatic, manual, aperture-priority, shutter-priority, ISO priority, shutter & aperture priority Bulb, automatic, manual, aperture-priority, shutter-priority
Bracketing Modes - Dynamic Range Bracketing, white balance bracketing
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)
White Balance Custom, automatic, presets Custom, automatic, presets
White Balance Presets Cloudy, tungsten light, Flash, daylight, shade, fluorescent light (cool white), fluorescent light (daylight), fluorescent light (warm white), Color Temperature Enhancement (CTE), fluorescent light (daylight white), ASTRO TRACER 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 electronically-controlled -
Max Shutter Speed 1/8000 sec 1/8000 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
White Balance Bracketing - Yes
X-sync Speed 1/200sec 1/250sec
Exposure Range EV -3-20 (ISO 100) EV -3-20 (ISO 100)
DISPLAY Pentax K-1 Sony Alpha7R III ILCE-7RM3
Type 3.2" LCD display 3" LCD display
Touch Screen - Yes
Display Format 1,037,000 pixels 1,440,000 pixels
Display Form Factor Folding Folding
Display Features Colour control, display brightness control, display saturation control Display brightness control, Peaking AF display, Touch AF
FLASH Pentax K-1 Sony Alpha7R III ILCE-7RM3
Features - AF illuminator
VIDEOGRAPHY / CAMCORDER Pentax K-1 Sony Alpha7R III ILCE-7RM3
Digital Video Format AVI, MJPEG, H.264 AVCHD, XAVC S
Image Recording Format JPEG, RAW + JPEG, DNG (RAW), PEF (RAW) JPEG, RAW, RAW + JPEG
Max Video Resolution 1920 x 1080 3840 x 2160
Audio Signal Format - Dolby Digital AC-3 (2 channel), Linear PCM
Microphone Operation Mode Stereo Stereo
MEMORY Pentax K-1 Sony Alpha7R III ILCE-7RM3
Memory Card Slot Dual SD card Memory Stick PRO Duo card, SD card
Supported Memory Cards SD Memory Card, SDXC Memory Card, SDHC Memory Card, SDHC UHS-I Memory Card, SDXC UHS-I Memory Card 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
Memory Card Included No No
Image Storage RAW 7360 x 4912
JPEG 7360 x 4912
JPEG 5760 x 3840
JPEG 4224 x 2816
JPEG 1920 x 1280
RAW 4800 x 3200
JPEG 4800 x 3200
7952 x 5304
7952 x 4472
5168 x 3448
5168 x 2912
3984 x 2656
3984 x 2240
2592 x 1728
2592 x 1456
Video Capture 1920 x 1080
1280 x 720
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
BATTERY AND CHARGING Pentax K-1 Sony Alpha7R III ILCE-7RM3
Battery Type Pentax D-Li90 Lithium Ion Sony NP-FZ100 Lithium Ion
Details Pentax D-Li90 Li-ion rechargeable battery (included) Sony NP-FZ100 Li-ion rechargeable battery - 2280 mAh (included)
Battery Life Photo shooting - 760 shots
Playback - 6.5 hours
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)
CONNECTIONS Pentax K-1 Sony Alpha7R III ILCE-7RM3
Interface HDMI, USB 2.0, IEEE 802.11b/g/n HDMI, USB 2.0, USB-C, IEEE 802.11b/g/n, NFC (Near Field Communication), Bluetooth 4.1
Connectivity Features - Remote live view
Print Standard - DPOF support, Exif Print support, PRINT Image Matching
Computer Connectivity Mac, Windows -
Flash Terminal Hot shoe, PC terminal Hot shoe, PC terminal
Connector Type USB 2.0 (5 pin Micro-USB Type B)
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 (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)
FEATURES Pentax K-1 Sony Alpha7R III ILCE-7RM3
Self-Timer Delay 2sec, 12sec 10 sec, 2sec, 5 sec
Continuous Shooting Speed 3 frames per second, 0.7 frames per second, 6.5 frames per second, 4.4 frames per second 8 frames per second, 3 frames per second, 10 frames per second, 6 frames per second
HDR Mode Auto HDR mode HDR Movie mode
Additional Features Digital image rotation, camera orientation detection, histogram display, AE lock, AF lock, interval shooting mode, peripheral illumination correction, no anti-aliasing filter, Lens Distortion Correction, primary colour filter, Interval Movie Record, Automatic composition correction function, Lateral Chromatic Aberration Correction, anti-aliasing filter simulator, diffraction correction, Pixel Shift Resolution technology, Operation Assist LED lighting 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
OTHERS Pentax K-1 Sony Alpha7R III ILCE-7RM3
Included Accessories Eyepiece cover, carrying strap, battery charger, body cap, eyecup, shoe cap, sync terminal cover Eyepiece cover, battery charger, body cap, shoulder strap, shoe cap, cable protector, USB-C cable
Max Operating Temperature 40 °C 40 °C
Min Operating Temperature -10 °C 0 °C
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