• APS-C 369.7mm2
  • 12.4 megapixels
  • ISO 200 - 6400
  • 35mm 861.6mm2
  • 42.4 megapixels
  • 35.00mm (35mm eq.)
  • Detailed specifications
  • Pentax K-x
  • Sony Cyber-shot DSC-RX1R II
Links
Prices:   Compare Prices
Manufacturer URL: Manufacturer website Manufacturer website
Predecessor: Pentax K2000
K2000 vs K-x
Sony RX1
RX1 vs RX1R II
Successor: Pentax K-r
K-x vs K-r
 
General
Model Number: K-x RX1R II
Alternate Model Number(s):    
Camera Format: SLR Mid-Sized
Currently Manufactured: No Yes
Retail Price: $649.95 $3299.99
Street Price: $701.76 $3,298.00
Date Available: 2009-10-15 2015-11-15
Tripod Mount: Yes Yes
Weight: 27.9 oz (791 g)
includes batteries, kit lens
17.9 oz (507 g)
includes batteries
Size: 4.8 x 3.6 x 2.7 in.
(122 x 92 x 69 mm)
4.5 x 2.6 x 2.8 in.
(113 x 65 x 72 mm)
Waterproof: No No
Waterproof Depth: n/a n/a
Image Sensor
Sensor Type: CMOS CMOS
Sensor Manufacturer:   Sony Exmor R (BSI)
Effective Megapixels: 12.4 42.4
Sensor Format: APS-C 35mm
Sensor size: 369.72mm2 (23.7mm x 15.6mm) 861.6mm2 (35.90mm x 24.00mm)
Approximate Pixel Pitch: 5.53 microns 4.51 microns
Focal Length Multiplier: 1.5x 1.0x
Aspect Ratio: 3:2 3:2
Color Filter Type: RGBG RGBG
Anti Aliasing Filter: Fixed Optional
Self-Cleaning: Yes Yes
Sensor shift image stabilization: Yes No
On-Sensor Phase Detect: No Yes
DxO Sensor Score: 72 97
DxO Color Depth Score (bits): 22.8 25.8
DxO Dynamic Range Score (evs): 12.5 13.9
DxO Maximum Effective ISO Score (iso): 811 3,204
Image Capture
Image Resolution: 4288 x 2848 (12.2 MP, Other),
3936 x 2624 (10.3 MP, 3:2),
3072 x 2048 (6.3 MP, 3:2),
1728 x 1152 (2.0 MP, 3:2)
7952 x 5304 (42.2 MP, 3:2),
7072 x 5304 (37.5 MP, 4:3),
7952 x 4472 (35.6 MP, 16:9),
5296 x 5296 (28.0 MP, 1:1),
5168 x 3448 (17.8 MP, 3:2),
4592 x 3448 (15.8 MP, 4:3),
5168 x 2912 (15.0 MP, Other),
3440 x 3440 (11.8 MP, 1:1),
3984 x 2656 (10.6 MP, 3:2),
3536 x 2656 (9.4 MP, 4:3),
3984 x 2240 (8.9 MP, 16:9),
2656 x 2656 (7.1 MP, 1:1),
3872 x 2160 (8.4 MP, Other),
8192 x 1856 (15.2 MP, Other),
5536 x 2160 (12.0 MP, Other),
12416 x 1856 (23.0 MP, Other)
Image File Format: JPEG (EXIF 2.21), 12-bit RAW (.PEF, .DNG) JPEG (EXIF 2.3), 14-bit RAW (uncompressed and compressed ARW 2.3), RAW+JPEG
Continuous-mode frames/second: 4.3 5.0
Video Capture
Can take movies: Yes Yes
Movie Resolution: 1280x720 (24)
640x416 (24)
1920x1080 (60p/​60i/​50p/​50i/​30p/​25p/​24p)
1280x720 (120p/​100/​30p/​25p)
Movie File Format:   XAVC S / AVCHD 2.0 / MP4; Audio: LPCM / Dolby Digital (AC-3) / MPEG-4 AAC-LC, stereo
Composite Video Out: Yes No
NTSC/PAL Switchable Video: Yes n/a
Video Usable as Viewfinder: No n/a
HD Video Out: No Yes
HD Video Connection: HDMI
Lens & Optics
Lens Mount: Pentax K (KA/KAF/KAF2/3) n/a
Lens: smc Pentax DA L 18-55mm f/3.5-5.6 AL Carl Zeiss Sonnar T* 2/35mm (fixed); 8 elements in 7 groups, 3 aspherical elements, 9 aperture blades
Focal Length (35mm equivalent): 27 - 84mm 35mm
Focal Length (actual): 18 - 55mm 35mm
Zoom Ratio: 3.00x 1.00x
Aperture Range: f/3.5 - 22 (W), f/5.6 - 38 (T) f/2 - f/22
Integrated ND Filter: No No
Normal Focus Range:   30 cm to Infinity
11.8 in to Infinity
Macro Focus Range:   20 - 35 cm
7.9 - 13.8 in
Filter Thread: 52.0mm 49.0mm
Thread Type: n/a n/a
Optical Image Stabilization: No No
Digital Zoom: No Yes
Digital Zoom Values: n/a Up to 2x Clear Image Zoom, Up to 4x standard digital zoom, 1.4x/2.0x Digital Teleconverter, up to 6.2x Smart digital zoom at lower resolutions
Auto Focus
Auto Focus: Yes Yes
Auto Focus Type: SAFOX VIII TTL phase-detect 11 point (9 cross) AF: 11 pt auto, 5 pt auto, AF pt select, center/spot Fast Hybrid AF (phase-detection/contrast-detection): Wide (399 points for PDAF, 25 points for CDAF), Center, Flexible Spot (S/M/L), Expand Flexible Spot, Lock-on AF (Wide / Center / Flexible Spot (S/M/L), Expand Flexible Spot)
Auto Focus Assist Light? Yes Yes
Manual Focus: Yes Yes
Viewfinder
Viewfinder: Optical / LCD EVF / LCD
Viewfinder Type: SLR type; fixed eye-level pentamirror, 96% coverage, 0.85x mag., -2.5 to +1.5 diopter 0.39-type, 2.36M-dot XGA OLED, 100% coverage, 0.74x magnification, 18.4mm eyepoint (CIPA), -4.0 to +3.0m-1 diopter
Focus Peaking: No Yes
EVF Resolution: n/a 2,359,296 dots
Viewfinder Magnification (35mm equivalent): 0.57x 0.74x
Viewfinder Magnification (nominal/claimed): 0.85x 0.74x
Display
Eye-level Viewfinder: Yes Yes
Rear Display: Yes Yes
Rear Display Size (inches): 2.7 3.0
Rear Display Resolution: 230,000 dots 1,228,800 dots (307,200 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): 6400 25600
Minimum ISO (native): 200 100
ISO Settings: Auto (200-6400), 100, 200, 400, 800, 1600, 3200, 6400; expandable to 12800 ISO 100-25600 (1/3 EV steps, expandable to 50-102400), Auto (100-25600 with selectable upper/lower limits); Multi Frame NR: 100-102400 (1 EV steps), Auto (100-102400 with selectable upper/lower limits)
Auto ISO Mode: Yes Yes
White Balance Settings: Auto, Daylight, Shade, Cloudy, Tungsten, Fluorescent (D, N, W, L), Flash, Custom Auto WB, Daylight, Shade, Cloudy, Incandescent, Fluorescent (Warm white/Cool white/Day white/Daylight), Flash, Color Temp, Color Filter, Custom
Shutter Speed Range: 1/6000 - 30 sec 1/4000 - 30 sec
Bulb Mode: Yes Yes
Exposure Compensation: +/- 2.0EV in 0.3EV steps +/- 5.0EV in 0.3EV steps
Metering Modes: 16-segment Multi, Center-weighted, Spot 1200-zone Evaluative, Center-weighted, Spot
Program Auto Exposure: Yes Yes
Aperture Priority: Yes Yes
Shutter Priority: Yes Yes
Full Manual Exposure: Yes Yes
Creative Exposure Modes: Auto Picture (Portrait, Landscape, Macro, Action, Night Scene Portrait, Picture (Portrait, Landscape, Macro, Action, Night Scene Portrait, Standard Flash Off), Scene (Night Scene, Surf & Snow, Food, Sunset, Kids, Pet, Candlelight, Museum, Stage Lighting [JPG], Night Snap [JPG]), Sensitivity Priority Scene modes: Portrait, Sports Action, Landscape, Sunset, Night Scene, Hand-held Twilight, Night Portrait, Anti Motion Blur; Panorama; Effects: Toy Camera, Pop Color, Posterisation, Retro Photo, Soft High-key, Partial Color, High Contrast Monochrome, Soft Focus, HDR Painting, Rich-tone Monochrome, Miniature, Watercolor, Illustration
Self Timer: 2 or 12 seconds 2, 5, 10; 3 or 5 shots after 2, 5, 10 seconds
Time Lapse (intervalometer):    
High Resolution Composite: No No
Flash
Built-in Flash: Yes No
Flash Modes: On, off, redeye, slow sync, slow sync w redeye, slow sync w trailing curtain, wireless Auto, Fill-flash, Slow Sync, Rear Sync, Off, Wireless (with optional compliant flash)
Flash Guide Number (ISO 100): 11.3 m / 37.1 ft. n/a
Flash Range Description: Depends on lens n/a
Max Flash Sync: 1/180 1/2000
Flash Exposure Compensation: -2 to +1 EV in 0.5EV steps +/- 3.0 EV in 0.3EV steps
External Flash Connection: Hot Shoe Multi Interface Hot Shoe
Built-In Wireless Flash Control: Full TTL exposure No
Image Storage
Usable Memory Types: SD / SDHC MS Duo / MS PRO Duo / SD / SDHC / SDXC
UHS Support:   UHS-I
Other Memory:    
Dual Card Slots: No No
RAW Capture Support: Yes Yes
Uncompressed Format: 12-bit RAW (.PEF, .DNG) 14-bit RAW (uncompressed and compressed ARW 2.3), RAW+JPEG
Movie File Format:   XAVC S / AVCHD 2.0 / MP4; Audio: LPCM / Dolby Digital (AC-3) / MPEG-4 AAC-LC, stereo
Included Memory: No memory included  
Included Memory Type:    
Connectivity
Built-In Wi-Fi: No Yes
NFC: No Yes
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 No
DPOF Compliant: Yes Yes
Remote Control: Yes Yes
Remote Control Type: Optional IR Threaded cable release, via USB or Wi-Fi
Connections (extended): AC adapter available Multi Micro USB, Micro HDMI (Type D), 3.5mm stereo microphone jack
Performance Timing
Cycle time for JPEG shooting in single shot mode (seconds per frame, max resolution): 0.39 0.64
Cycle time for RAW shooting in single shot mode (seconds per frame): 0.43  
Buffer size for RAW shooting in single shot mode (frames): 10  
Cycle time for RAW+JPEG shooting in single shot mode (seconds per shot):   0.62
Camera penalizes early shutter press? No No
JPEG shooting speed in burst mode (fps, max resolution): 4.3 5.0
Buffer size for JPEG shooting in burst mode (frames, max resolution): 25 24
RAW shooting speed in burst mode (fps):   5.0
Buffer size for RAW shooting in burst mode (frames):   23
RAW+JPEG shooting speed in burst mode (fps):   5.0
Buffer Size for RAW+JPEG shooting in burst mode (frames):   22
Shutter lag (full AF, wide/mid): 0.10 seconds 0.26 seconds
Shutter lag (full AF, tele):    
Shutter lag (full AF, live view - DSLR):    
Shutter lag (prefocused, live view - DSLR):    
Shutter Lag (manual focus): 0.082 seconds 0.059 seconds
Shutter lag (full AF, with flash): 0.23 seconds  
Shutter Lag (prefocused): 0.082 seconds 0.016 seconds
Shutter Lag (notes): Live View: Phase-detect Full AF: 0.448s Contrast-detect Full AF: 2.567s Prefocused: 0.427s  
Startup Time: 0.6 seconds 1.5 seconds
Play -> Record Time: 0.2 seconds 1.0 seconds
Flash cycle time, full power: 3.3 seconds  
Power
Battery Life, Stills (CIPA Rating Monitor/Live View):   220 shots
Battery Life, Still (CIPA Rating OVF/EVF): 420 shots (NiMH AA) 200 shots
Battery Life, Video:   30 minutes
Battery Form Factor: 4 x AA Proprietary NP-BX1
Usable Battery Types: Lithium, Alkaline disposables; NiMH rechargeables Lithium-ion rechargeable
Batteries Included: 4 x AA Alkaline disposables 1 x Proprietary NP-BX1 Lithium-ion rechargeable
Battery Charger Included (dedicated charger or AC/USB adapter): No Yes
Dedicated Battery Charger Included: Yes
Internal Charging Supported: Yes
Software
Included Software: CD-ROM Free downloads of Image Data Converter (Win only), PlayMemories Home, Capture One Express (for Sony)
OS Compatibility: Windows XP/Vista/7, MacOS-X 10.3+ Windows, Mac OS X
Miscellaneous
Notes & Features: Sensor-shift shake reduction, 720p HD video capture, Live View with face detection. Available in black or white. Limited edition colors of red and navy will become available at select locations to be announced.