• APS-C 366.6mm2
  • 20.1 megapixels
  • ISO 100 - 51,200
  • APS-C 368.2mm2
  • 16.3 megapixels
  • ISO 200 - 6400
  • Detailed specifications
  • Pentax K-S1
  • Fujifilm X-T1 IR
Links
Prices: Compare Prices Compare Prices
Manufacturer URL: Manufacturer website Manufacturer website
Predecessor:    
Successor:    
General
Model Number: K-S1 X-T1 IR
Alternate Model Number(s):    
Camera Format: SLR Compact System Camera
Currently Manufactured: No No
Retail Price: $799.95 $1699.95
Street Price: $399.00 $1,699.00
Date Available: 2014-09-15 2015-10-15
Tripod Mount: Yes Yes
Weight: 27.0 oz (765 g)
includes batteries, kit lens
15.5 oz (440 g)
includes batteries
Size: 4.8 x 3.7 x 2.8 in.
(121 x 93 x 70 mm)
5.1 x 3.5 x 1.8 in.
(129 x 90 x 47 mm)
Waterproof: No No
Waterproof Depth: n/a n/a
Image Sensor
Sensor Type: CMOS CMOS
Sensor Manufacturer:    
Effective Megapixels: 20.1 16.3
Sensor Format: APS-C APS-C
Sensor size: 366.6mm2 (23.50mm x 15.60mm) 368.16mm2 (23.60mm x 15.60mm)
Approximate Pixel Pitch: 4.29 microns 4.82 microns
Focal Length Multiplier: 1.5x 1.5x
Aspect Ratio: 3:2 3:2
Color Filter Type: RGBG X-Trans II
Anti Aliasing Filter: Optional Not needed
Self-Cleaning: Yes Yes
Sensor shift image stabilization: Yes No
On-Sensor Phase Detect: No Yes
DxO Sensor Score: 78 0
DxO Color Depth Score (bits): 23.5  
DxO Dynamic Range Score (evs): 13.0  
DxO Maximum Effective ISO Score (iso): 1,061  
Image Capture
Image Resolution: 5472 x 3648 (20.0 MP, 3:2),
4224 x 2816 (11.9 MP, 3:2),
3072 x 2048 (6.3 MP, 3:2),
1920 x 1280 (2.5 MP, 3:2)
4896 x 3264 (16.0 MP, 3:2),
4896 x 2760 (13.5 MP, Other),
3264 x 3264 (10.7 MP, 1:1),
3456 x 2304 (8.0 MP, 3:2),
3456 x 1944 (6.7 MP, 16:9),
2304 x 2304 (5.3 MP, 1:1),
2496 x 1664 (4.2 MP, 3:2),
2496 x 1408 (3.5 MP, Other),
1664 x 1664 (2.8 MP, 1:1),
9600 x 2160 (20.7 MP, Other),
9600 x 1440 (13.8 MP, Other),
6400 x 2160 (13.8 MP, Other),
6400 x 1440 (9.2 MP, Other)
Image File Format: JPEG (EXIF 2.30), 12-bit RAW (.PEF, .DNG) JPEG (Exif Ver 2.3), .RAF RAW (ISO 200-6400), RAW + JPEG
Continuous-mode frames/second: 5.4 8.0
Video Capture
Can take movies: Yes Yes
Movie Resolution: 1920x1080 (30p/25p/24p)
1280x720 (60p/50p)
1920x1080 (60p/50p/30p/25p/24p)
1280x720 (60p/50p/30p/25p/24p)
Movie File Format: MPEG-4 AVC/H.264 (MOV) MOV (H.264) with linear PCM stereo sound
Composite Video Out: No
NTSC/PAL Switchable Video: n/a n/a
Video Usable as Viewfinder: n/a n/a
HD Video Out: Yes Yes
HD Video Connection: HDMI HDMI
Lens & Optics
Lens Mount: Pentax K (KA/KAF/KAF2) Fujifilm X
Lens: smc Pentax-DA L 18-55mm f/3.5-5.6 AL n/a
Focal Length (35mm equivalent): 27 - 83mm  
Focal Length (actual): 18 - 55mm  
Zoom Ratio: 3.06x  
Aperture Range: f/3.5 - f/22 (wide) / f/5.6 - f/40 (tele)  
Integrated ND Filter: No No
Normal Focus Range: 25 cm to Infinity
9.8 in to Infinity
 
Macro Focus Range:    
Filter Thread: 52.0mm n/a
Thread Type: n/a n/a
Optical Image Stabilization: No Yes
Digital Zoom: No
Digital Zoom Values:   n/a
Auto Focus
Auto Focus: Yes Yes
Auto Focus Type: SAFOX IX i+, TTL phase-matching -11 point (9 cross type focus points in the center) Intelligent Hybrid AF (TTL contrast AF/TTL phase detection AF); 49 area / Multi
Auto Focus Assist Light? Yes Yes
Manual Focus: Yes Yes
Viewfinder
Viewfinder: Optical / LCD EVF / LCD
Viewfinder Type: SLR type; eye-level pentaprism, ~100% coverage, 0.95x mag., 20.5mm eyepoint, -2.5 to +1.5 diopter EVF: 0.5-inch 2.36M-dot OLED with 100% coverage, 0.77x magnification with 50mm lens (35mm format equivalent), 23mm eyepoint, -4 to +2 diopter adjustment, eye sensor
Focus Peaking: Yes Yes
EVF Resolution: n/a 2,360,000 dots
Viewfinder Magnification (35mm equivalent): 0.63x 0.77x
Viewfinder Magnification (nominal/claimed): 0.95x 0.00x
Display
Eye-level Viewfinder: Yes Yes
Rear Display: Yes Yes
Rear Display Size (inches): 3.0 3.0
Rear Display Resolution: 921,600 dots (307,200 px) 1,040,000 dots (345,600 px)
Touchscreen: No No
Articulating Screen: No Yes
Tilt Swivel Screen: No No
Selfie Screen: No No
Max Playback Zoom: 16.0x  
Top Deck Display: No No
Exposure
Maximum ISO (native): 51200 6400
Minimum ISO (native): 100 200
ISO Settings: Auto, 100-51200 (1, 1/2 or 1/3 EV steps) 200-6400, Extended output sensitivity equivalent ISO 100, 12800 and 25600; AUTO(400), AUTO(800), AUTO(1600), AUTO(3200), AUTO(6400)
Auto ISO Mode: Yes Yes
White Balance Settings: Auto, Multi Auto, Daylight, Shade, Cloudy, Fluorescent Light (D: Daylight Color, N: Daylight White, W: Cool White, L: Warm White), Tungsten Light, Flash, CTE, Manual, Color Temperature Fine, Shade, Fluorescent light (Daylight), Fluorescent light (Warm White), Fluorescent light (Cool White), Incandescent light, Underwater, Custom, Color Temperature (K)
Shutter Speed Range: 1/6000 - 30 sec 1/32000 - 30 sec
Bulb Mode: Yes Yes
Exposure Compensation: +/- 5.0EV in 0.3EV steps +/- 3.0EV in 0.3EV steps
Metering Modes: TTL open-aperture: 77 segment Multi, Center-weighted, Spot TTL 256-zones metering: Multi, Spot, Average
Program Auto Exposure: Yes Yes
Aperture Priority: Yes Yes
Shutter Priority: Yes Yes
Full Manual Exposure: Yes Yes
Creative Exposure Modes: Sensitivity Priority, Shutter & Aperture Priority (Tav); Scene: Portrait, Landscape, Macro, Moving Object, Night Scene Portrait, Sunset, Blue Sky, Forest, Night Scene, Night Scene HDR (JPEG only), Night Snap, Food, Pet, Kids, Surf & Snow, Backlight Silhouette, Candlelight, Stage Lighting, Museum; Effect: Faded Color, Clear Tone, Brilliant Color, Unicolor Bold, Vintage Color, Cross Processing, Warm Fade, Tone Expansion, Bold Monochrome, Infrared Filter, Vibrant Color Enhance; Digital filters (capture): Extract Color, Replace Color, Toy Camera, Retro, High Contrast, Shading, Invert Color, Unicolor Bold, Bold Monochrome; HDR: Auto, HDR1, HDR2, HDR3 TBD
Self Timer: 2 or 12 seconds 2 or 10 seconds
Time Lapse (intervalometer):   Yes
High Resolution Composite: No No
Flash
Built-in Flash: Yes No
Flash Modes: Auto Flash Discharge, Auto Flash + Red-eye Reduction (Auto Picture, Scene) Flash On, Flash On+ Red-eye Reduction, Slow-speed Sync, Trailing Curtain Sync, Manual Flash Discharge (Full-1/128) Red-eye removal OFF: Auto, Forced Flash, Suppressed Flash, Slow Synchro. Rear-curtain Synchro; Red-eye removal ON: Red-eye Reduction Auto, Red-eye Reduction & Forced Flash, Suppressed Flash, Red-eye Reduction & Slow Synchro. Red-eye Reduction & Rear-curtain Synchro; Basic trigger (Commander) mode
Flash Guide Number (ISO 100): 10.0 m / 32.8 ft. n/a
Flash Range Description: Depends on lens n/a
Max Flash Sync: 1/180 1/180
Flash Exposure Compensation: -2 to +1 EV in 0.5EV steps +/- 2.0 EV in 0.3EV steps
External Flash Connection: Hot Shoe Hot shoe
Built-In Wireless Flash Control:    
Image Storage
Usable Memory Types: SD / SDHC / SDXC SD / SDHC / SDXC
UHS Support: UHS-I UHS-II
Other Memory: UHS-I compliant  
Dual Card Slots: No No
RAW Capture Support: Yes Yes
Uncompressed Format: 12-bit RAW (.PEF, .DNG) .RAF RAW (ISO 200-6400), RAW + JPEG
Movie File Format: MPEG-4 AVC/H.264 (MOV) MOV (H.264) with linear PCM stereo sound
Included Memory: No memory included No memory included
Included Memory Type:    
Connectivity
Built-In Wi-Fi: No Yes
NFC: No No
Bluetooth: No No
Built-In GPS: No No
Microphone Jack: No Yes
Headphone Jack: No No
External Connections: USB 2.0 High Speed USB 2.0 High Speed,WiFi
PictBridge Compliant: No Yes
DPOF Compliant: Yes Yes
Remote Control: Yes Yes
Remote Control Type: Optional IR Optional RR-90 wired remote
Connections (extended): Micro (Type D) HMDI Mini (Type C) HDMI, 2.5mm Stereo Microphone/Remote Jack
Performance Timing
Cycle time for JPEG shooting in single shot mode (seconds per frame, max resolution):    
Cycle time for RAW shooting in single shot mode (seconds per frame):    
Buffer size for RAW shooting in single shot mode (frames):    
Cycle time for RAW+JPEG shooting in single shot mode (seconds per shot):    
Camera penalizes early shutter press?
JPEG shooting speed in burst mode (fps, max resolution): 5.4 8.0
Buffer size for JPEG shooting in burst mode (frames, max resolution): 20  
RAW shooting speed in burst mode (fps):    
Buffer size for RAW shooting in burst mode (frames):    
RAW+JPEG shooting speed in burst mode (fps):    
Buffer Size for RAW+JPEG shooting in burst mode (frames):    
Shutter lag (full AF, wide/mid):    
Shutter lag (full AF, tele):    
Shutter lag (full AF, live view - DSLR):    
Shutter lag (prefocused, live view - DSLR):    
Shutter Lag (manual focus):    
Shutter lag (full AF, with flash):    
Shutter Lag (prefocused):    
Shutter Lag (notes):    
Startup Time:    
Play -> Record Time:    
Flash cycle time, full power: 0.0 seconds  
Power
Battery Life, Stills (CIPA Rating Monitor/Live View):    
Battery Life, Still (CIPA Rating OVF/EVF): 480 shots  
Battery Life, Video:    
Battery Form Factor: Proprietary D-LI109 Proprietary NP-W126
Usable Battery Types: Lithium-ion rechargeable Lithium-ion rechargeable
Batteries Included: 1 x Proprietary D-LI109 Lithium-ion rechargeable 1 x Proprietary NP-W126 Lithium-ion rechargeable
Battery Charger Included (dedicated charger or AC/USB adapter): Yes Yes
Dedicated Battery Charger Included: Yes
Internal Charging Supported: No
Software
Included Software: Digital Camera Utility 5 Software CD-ROM  
OS Compatibility:    
Miscellaneous
Notes & Features: The K-S1 comes in 3 standard colors: black, blue, and white. In addition, two separate color collections are available; The Fabric Collection, containing 4 unique colors such as cotton beige and tweed gray – and the Night Sky Collection, with 5 more elegant colors like Sunset Orange, Dawn Purple, and Midnight Black. Sensitive to ultraviolet (UV), visible and infrared (IR) portions of the spectrum (approximately 380nm - 1,000nm)