Pentax K-S1 vs. Fujifilm GFX 100

Camera Comparison, Reviews and Tests

In depth comparison and review of Pentax K-S1 and Fujifilm GFX 100. 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. Fujifilm GFX 100 Comparison Chart
DESIGN AND DIMENSIONS Pentax K-S1 Fujifilm GFX 100
Product Type Digital camera - 1080p - SLR with Live View mode, movie recording Digital camera - 4K - mirrorless system with movie recording
Lens Included Body only Body only
Height 9.3 cm 16.36 cm
Width 12 cm 15.62 cm
Depth 7 cm 10.29 cm
Weight 485 g 1.155 kg
Weight Details - Camera body only: 1.155 kg
Camera with battery and memory card: 1.32 kg
Camera with EVF, battery and memory card: 1.4 kg
Body Material - Magnesium alloy
Enclosure Colour White | Black -
Protection - Weatherproof, freezeproof, dust-resistant
SENSOR Pentax K-S1 Fujifilm GFX 100
Sensor Resolution 20.12 Megapixel 100 Megapixel
Optical Sensor Type CMOS CMOS
Total Pixels 20,420,000 pixels -
Effective Sensor Resolution 20,120,000 pixels 102,000,000 pixels
Optical Sensor Size APS-C (23.5 x 15.6 mm) Medium Format (43.8 x 32.9 mm)
Frame Rate (Max Resolution) - 30 fps
Sensor Dust Reduction Yes Yes
Sensor Features Special Protect (SP) coating Ultrasonic vibration
Image Stabiliser - Optical (5-axis image sensor shift mechanism)
Built-in Optical Image Stabiliser - Yes
Sensors - Digital level metre
PROCESSOR Pentax K-S1 Fujifilm GFX 100
Image Processor PRIME MII X-Processor 4
LENS Pentax K-S1 Fujifilm GFX 100
Lens Mounting Type Pentax KAF2 Fujifilm G Mount
FOCUSING Pentax K-S1 Fujifilm GFX 100
Auto Focus TTL phase detection TTL contrast and phase detection
Auto Focus Points (Zones) Qty 11 -
AE/AF Control Face-priority AF, Subject-tracking AF -
Face Detection Yes Eye Detect AF, face-priority AF function
VIEWFINDER Pentax K-S1 Fujifilm GFX 100
Viewfinder Type Optical - fixed eye-level pentaprism Electronic - OLED
Viewfinder Colour Support - Colour
Viewfinder Diagonal Size - 0.5"
Viewfinder Resolution - 5,760,000 pixels
Optical Viewfinder Field Coverage 100% 100%
Optical Viewfinder Magnification 0.95x 0.86x
Optical Viewfinder Dioptric Correction Range -2.5 to +1.5 -4 to +2
Interchangeable - Yes
Features - Viewfinder brightness control, auto eye sensor
EXPOSURE & WHITE BALANCE Pentax K-S1 Fujifilm GFX 100
ISO (Max) 51200 102400
Native ISO 100-51200 100-12800
Extended ISO (Max) - 25600 (H1), 51200 (H2), 102400 (H3)
Extended ISO (Min) - 50
Light Sensitivity ISO 100-51200, ISO auto (100-51200) ISO 50, ISO auto, ISO 102400, ISO 51200, ISO 25600, ISO 100-12800
Exposure Metering Multi-segment, centre-weighted, spot Multi-segment, centre-weighted, average, spot (2%)
Exposure Metering Zones 77 256
Exposure Modes Programme, automatic, manual, aperture-priority, shutter-priority, shutter & aperture priority Automatic, manual, aperture-priority, shutter-priority
Bracketing Modes - Dynamic Range Bracketing, Film Simulation Bracketing, focus bracketing, ISO sensitivity 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 -
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 Chrome, Film Simulation, Grainy Film
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) -
Shutter Type Mechanical electronically-controlled Mechanical, electronic
Max Shutter Speed 1/6000 sec 1/16000 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 1/3 EV steps
Auto Exposure Bracketing - 2, 3, 5, 7, 9 steps in 1/3 - 3 EV steps
White Balance Bracketing Yes Yes
X-sync Speed 1/180 sec 1/125sec
Exposure Range EV 0-22 (ISO 100) -
DISPLAY Pentax K-S1 Fujifilm GFX 100
Type 3" LCD display 3.2" LCD display
Touch Screen - Yes
Display Format 921,000 pixels 2,360,000 pixels
Display Form Factor Built-in Folding
Display Features Colour control, display brightness control Display brightness control, display colour control
FLASH Pentax K-S1 Fujifilm GFX 100
Camera Flash Pop-up flash -
Guide Number (m / ISO 100) 10 -
Flash Modes Fill-in mode, rear curtain sync, slow synchro, auto mode, flash OFF mode, red-eye reduction -
Red-Eye Reduction Yes -
Features AF illuminator, flash +/- compensation -
VIDEOGRAPHY / CAMCORDER Pentax K-S1 Fujifilm GFX 100
Digital Video Format H.264 H.264, HEVC, H.265
Image Recording Format JPEG, DNG (RAW) + JPEG, DNG (RAW) JPEG, TIFF, RAW, RAW + JPEG
Max Video Resolution 1920 x 1080 4096 x 2160
Microphone Operation Mode Mono -
Microphone Features Sensitivity control -
MEMORY Pentax K-S1 Fujifilm GFX 100
Memory Card Slot SD card SD card
Supported Memory Cards SD Memory Card, SDXC Memory Card, SDHC Memory Card, SDXC UHS-I Memory Card SD Memory Card, SDXC Memory Card, SDHC Memory Card, SDHC UHS-I Memory Card, SDXC UHS-I Memory Card, SDHC UHS-II Memory Card, SDXC UHS-II Memory Card
Memory Card Included - No
Image Storage - 11648 x 8736
11648 x 7768
11648 x 6552
8736 x 8736
11648 x 4304
10298 x 8736
10192 x 8736
8256 x 6192
8256 x 5504
8256 x 4640
6192 x 6192
8256 x 3048
7744 x 6192
7232 x 6192
4000 x 3000
4000 x 2664
4000 x 2248
2992 x 2992
4000 x 1480
3744 x 3000
3504 x 3000
Video Capture H.264 - 1920 x 1080 - 30 fps
H.264 - 1920 x 1080 - 25 fps
H.264 - 1920 x 1080 - 24 fps
4096 x 2160
3840 x 2160
2048 x 1080
1920 x 1080
BATTERY AND CHARGING Pentax K-S1 Fujifilm GFX 100
Battery Type Pentax D-Li109 Lithium Ion Fujifilm NP-T125 Lithium Ion
Details Pentax D-Li109 Li-ion rechargeable battery (included) 2 x Fujifilm NP-T125 Li-ion rechargeable battery (included)
Battery Life Photo shooting - 480 shots (50% flash usage)
Playback - 4.5 hours
Photo shooting - 800 shots
Video recording - 170 minutes (4K resolution)
CONNECTIONS Pentax K-S1 Fujifilm GFX 100
Interface HDMI HDMI, USB 3.0, IEEE 802.11a/b/g/n/ac
Connectivity Features - Remote control via mobile devices, remote live view, Wireless Image Transfer
Print Standard DPOF support, Exif Print support Exif Print support
Flash Terminal Hot shoe Hot shoe
Connector Type USB 2.0
HDMI output (19 pin micro HDMI Type D)
USB 3.0 (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)
Remote control (sub-mini phone 2.5 mm)
DC power input
FEATURES Pentax K-S1 Fujifilm GFX 100
Self-Timer Delay 2sec, 12sec 10 sec, 2sec
Continuous Shooting Speed 3 frames per second, 5.4 frames per second 5 frames per second
HDR Mode Auto HDR 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 Auto power save, date/time stamp, depth-of-field preview button, sharpness control, histogram display, colour control, AE lock, AF lock, in-camera red-eye removal, highlight point display, Automatic Pixel Mapping (APM), in-camera RAW processing, noise reduction over long exposures, Lens Modulation Optimizer (LMO), noise reduction, multiple exposure capture
OTHERS Pentax K-S1 Fujifilm GFX 100
Included Accessories Battery charger, body cap, shoulder strap, eyecup, shoe cap Battery charger, body cap, shoulder strap, viewfinder, power plug adapter, strap clip, cable protector, strap clip lock
Software Drivers & Utilities -
Max Operating Temperature 40 °C 40 °C
Min Operating Temperature -10 °C -10 °C
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