Pentax K-S1 vs. Sony Alpha6400 ILCE-6400M + E 18-135mm OSS

Camera Comparison, Reviews and Tests

In depth comparison and review of Pentax K-S1 and Sony Alpha6400 ILCE-6400M + E 18-135mm OSS. 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-S1 vs. Sony Alpha6400 ILCE-6400M + E 18-135mm OSS Comparison Chart
DESIGN AND DIMENSIONS Pentax K-S1 Sony Alpha6400 ILCE-6400M + E 18-135mm OSS
Product Type Digital camera - 1080p - SLR with Live View mode, movie recording Digital camera - 4K - mirrorless system
Lens Included Body only E 18-135mm OSS lens
Height 9.3 cm 6.69 cm
Width 12 cm 12 cm
Depth 7 cm 4.99 cm
Weight 485 g 359 g
Weight Details - Camera body only: 359 g
Camera with battery and memory card: 403 g
Body Material - Magnesium alloy
Enclosure Colour White | Black Black
Digital Zoom - 4x
Optical Zoom - 7.5x
SENSOR Pentax K-S1 Sony Alpha6400 ILCE-6400M + E 18-135mm OSS
Sensor Resolution 20.12 Megapixel 24.2 Megapixel
Optical Sensor Type CMOS Exmor CMOS
Total Pixels 20,420,000 pixels 25,000,000 pixels
Effective Sensor Resolution 20,120,000 pixels 24,200,000 pixels
Optical Sensor Size APS-C (23.5 x 15.6 mm) APS-C (23.5 x 15.6 mm)
Frame Rate (Max Resolution) - 30 fps
Sensor Dust Reduction Yes Yes
Sensor Features Special Protect (SP) coating Dust Reduction (image sensor vibration), Anti-Dust coating
Image Stabiliser - Optical (Steady Shot)
PROCESSOR Pentax K-S1 Sony Alpha6400 ILCE-6400M + E 18-135mm OSS
Image Processor PRIME MII BIONZ X
LENS Pentax K-S1 Sony Alpha6400 ILCE-6400M + E 18-135mm OSS
Type - Zoom lens - 7.5x zoom - 18 - 135 mm - f/3.5-5.6 E OSS - zoom
Focal Length Equivalent to 35mm Camera - 27 - 202.5mm
Focus Adjustment - Automatic, manual
Min Focus Distance - 45 cm
Max View Angle - 76 degree(s)
Zoom Adjustment - Manual (by ring)
Lens Construction - 12 groups / 16 elements
Filter Size - 55 mm
Lens Mounting Type Pentax KAF2 Sony E-mount
Features - ED glass, aspherical lens, linear AF motor
FOCUSING Pentax K-S1 Sony Alpha6400 ILCE-6400M + E 18-135mm OSS
Auto Focus TTL phase detection TTL contrast and phase detection
Auto Focus Points (Zones) Qty 11 425
Auto Focus Features - Focus Peaking function, 4D FOCUS system
AE/AF Control Face-priority AF, Subject-tracking AF Eye detection AF, Predictive AI Servo AF, Real-time Eye AF, Real-time Tracking AF
Face Detection Yes Yes
VIEWFINDER Pentax K-S1 Sony Alpha6400 ILCE-6400M + E 18-135mm OSS
Viewfinder Type Optical - fixed eye-level pentaprism Electronic - OLED
Viewfinder Colour Support - Colour
Viewfinder Diagonal Size - 0.39"
Viewfinder Resolution - 2,359,296 pixels
Optical Viewfinder Field Coverage 100% -
Optical Viewfinder Magnification 0.95x 1.07x
Optical Viewfinder Dioptric Correction Range -2.5 to +1.5 -
Field of View Crop Factor - 1.5
Features - Auto eye sensor
EXPOSURE & WHITE BALANCE Pentax K-S1 Sony Alpha6400 ILCE-6400M + E 18-135mm OSS
ISO (Max) 51200 102400
Native ISO 100-51200 100-32000
Extended ISO (Max) - 102400
Light Sensitivity ISO 100-51200, ISO auto (100-51200) ISO auto (100-6400), ISO 100-32000
Exposure Metering Multi-segment, centre-weighted, spot Multi-segment, centre-weighted, spot
Exposure Metering Zones 77 1200
Exposure Modes Programme, automatic, manual, aperture-priority, shutter-priority, shutter & aperture priority Programme, bulb, automatic, manual, aperture-priority, shutter-priority
Bracketing Modes - Flash Exposure Bracketing, white balance bracketing
Shooting Programs Landscape, portrait mode, macro, museum, surf & snow, PET, Blue Sky, food, night scene, sunset, candle, night snapshot, night scene with portrait, kids, Stage, night scene HDR, moving object, forest, backlight silhouette Landscape, portrait mode, macro, night portrait, night scene, sports mode, sunset, handheld twilight, anti-motion blur
Special Effects Natural, bright, Vibrant, monochrome, Muted, landscape, portrait, Cross Process, Bleach Bypass, Radiant, Reversal Film, Tone Expansion, Cold vintage, Colour Fade, Bold Monochrome, Unicolour Bold, Clear Tone, Warm Fade, Brilliant Colour, Infrared Filter 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 Cloudy, tungsten light, Flash, daylight, shade, fluorescent light (cool white), fluorescent light (warm white), Color Temperature Enhancement (CTE), fluorescent light (daylight colour), 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 electronically-controlled Mechanical, electronic
Max Shutter Speed 1/6000 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 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 1/180 sec 1/160 sec
Exposure Range EV 0-22 (ISO 100) EV -2-20 (ISO 100)
DISPLAY Pentax K-S1 Sony Alpha6400 ILCE-6400M + E 18-135mm OSS
Type 3" LCD display 3" LCD display
Touch Screen - Yes
Display Format 921,000 pixels 921,600 pixels
Display Form Factor Built-in Tilting
Display Features Colour control, display brightness control Display brightness control, display colour control, display contrast control
FLASH Pentax K-S1 Sony Alpha6400 ILCE-6400M + E 18-135mm OSS
Camera Flash Pop-up flash Pop-up flash
Guide Number (m / ISO 100) 10 6
Flash Modes Fill-in mode, rear curtain sync, slow synchro, auto mode, flash OFF mode, red-eye reduction Fill-in mode, rear curtain sync, slow synchro, auto mode, flash OFF mode, red-eye reduction, high-speed sync
Red-Eye Reduction Yes Yes
Features AF illuminator, flash +/- compensation AF illuminator, flash +/- compensation, wireless off-camera control
VIDEOGRAPHY / CAMCORDER Pentax K-S1 Sony Alpha6400 ILCE-6400M + E 18-135mm OSS
Digital Video Format H.264 AVCHD, XAVC S
Image Recording Format JPEG, DNG (RAW) + JPEG, DNG (RAW) JPEG, RAW, RAW + JPEG
Max Video Resolution 1920 x 1080 3840 x 2160
Surround Sound - Dolby Digital AC-3 (2 channel) recording
Microphone Operation Mode Mono Stereo
Microphone Features Sensitivity control -
MEMORY Pentax K-S1 Sony Alpha6400 ILCE-6400M + E 18-135mm OSS
Memory Card Slot SD card Memory Stick PRO Duo card, SD card
Supported Memory Cards SD Memory Card, SDXC Memory Card, SDHC 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, Memory Stick Micro Mark2, SDHC UHS-I Memory Card, SDXC UHS-I Memory Card
Memory Card Included - No
Image Storage - 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 H.264 - 1920 x 1080 - 30 fps
H.264 - 1920 x 1080 - 25 fps
H.264 - 1920 x 1080 - 24 fps
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 Pentax K-S1 Sony Alpha6400 ILCE-6400M + E 18-135mm OSS
Battery Type Pentax D-Li109 Lithium Ion Sony NP-FW50 Lithium Ion
Details Pentax D-Li109 Li-ion rechargeable battery (included) Sony NP-FW50 Li-ion rechargeable battery - 1080 mAh (included)
Battery Life Photo shooting - 480 shots (50% flash usage)
Playback - 4.5 hours
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 Pentax K-S1 Sony Alpha6400 ILCE-6400M + E 18-135mm OSS
Interface HDMI HDMI, USB 2.0, IEEE 802.11b/g/n, NFC (Near Field Communication), Bluetooth 4.1
Connectivity Features - Remote control via mobile devices, remote live view
Print Standard DPOF support, Exif Print support DPOF support, Exif Print support, PRINT Image Matching
Computer Connectivity - Mac, Windows
Flash Terminal Hot shoe Hot shoe
Connector Type USB 2.0
HDMI output (19 pin micro HDMI Type D)
USB 2.0
HDMI output (19 pin micro HDMI Type D)
Microphone (mini-phone stereo 3.5 mm)
FEATURES Pentax K-S1 Sony Alpha6400 ILCE-6400M + E 18-135mm OSS
Self-Timer Delay 2sec, 12sec 10 sec, 2sec, 5 sec
Continuous Shooting Speed 3 frames per second, 5.4 frames per second 8 frames per second, 3 frames per second, 6 frames per second, 11 frames per second
HDR Mode Auto HDR mode HDR Movie mode
Additional Features RGB primary colour filter, depth-of-field preview button, digital image rotation, camera orientation detection, histogram display, AE lock, AF lock, cropping an image, resizing an image, saturation control, in-camera film editing, in-camera RAW processing, HDR image enhancement technology, hue control, Eye-Fi Card Ready, LED body illumination 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 Pentax K-S1 Sony Alpha6400 ILCE-6400M + E 18-135mm OSS
Included Accessories Battery charger, body cap, shoulder strap, eyecup, shoe cap Eyepiece cover, dust cap, body cap, lens cap, shoulder strap, shoe cap, micro-USB cable
Software Drivers & Utilities -
Max Operating Temperature 40 °C 40 °C
Min Operating Temperature -10 °C 0 °C
Other projects: