• APS-C 369.7mm2
  • 12.4 megapixels
  • ISO 200 - 6400
  • 1 inch 116.2mm2
  • 20.2 megapixels
  • 28.00mm - 100.00mm (35mm eq.)
  • Detailed specifications
  • Pentax K-x
  • Sony Cyber-shot DSC-RX100
Links
Prices:   Compare Prices
Manufacturer URL: Manufacturer website Manufacturer website
Predecessor: Pentax K2000
K2000 vs K-x
 
Successor: Pentax K-r
K-x vs K-r
Sony RX100 II
RX100 vs RX100 II
General
Model Number: K-x RX100
Alternate Model Number(s):    
Camera Format: SLR Compact
Currently Manufactured: No Yes
Retail Price: $649.95 $649.99
Street Price: $701.76 $1,094.95
Date Available: 2009-10-15 2012-07-27
Tripod Mount: Yes Yes
Weight: 27.9 oz (791 g)
includes batteries, kit lens
8.5 oz (240 g)
includes batteries
Size: 4.8 x 3.6 x 2.7 in.
(122 x 92 x 69 mm)
4.0 x 2.3 x 1.4 in.
(102 x 58 x 36 mm)
Waterproof: No No
Waterproof Depth: n/a n/a
Image Sensor
Sensor Type: CMOS CMOS
Sensor Manufacturer:   Sony Exmor
Effective Megapixels: 12.4 20.2
Sensor Format: APS-C 1 inch
Sensor size: 369.72mm2 (23.7mm x 15.6mm) 116.16mm2 (13.20mm x 8.80mm)
Approximate Pixel Pitch: 5.53 microns 2.41 microns
Focal Length Multiplier: 1.5x 2.7x
Aspect Ratio: 3:2 3:2
Color Filter Type: RGBG RGBG
Anti Aliasing Filter: Fixed Fixed
Self-Cleaning: Yes No
Sensor shift image stabilization: Yes No
On-Sensor Phase Detect: No No
DxO Sensor Score: 72 66
DxO Color Depth Score (bits): 22.8 22.6
DxO Dynamic Range Score (evs): 12.5 12.4
DxO Maximum Effective ISO Score (iso): 811 390
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)
5472 x 3648 (20.0 MP, 3:2),
4864 x 3648 (17.7 MP, 4:3),
5472 x 3080 (16.9 MP, 16:9),
3648 x 3648 (13.3 MP, 1:1),
3888 x 2592 (10.1 MP, 3:2),
3648 x 2736 (10.0 MP, 4:3),
3648 x 2056 (7.5 MP, Other),
2736 x 1824 (5.0 MP, 3:2),
2592 x 1944 (5.0 MP, 4:3),
2720 x 1528 (4.2 MP, 16:9),
12416 x 1856 (23.0 MP, Other),
8192 x 1856 (15.2 MP, Other),
2160 x 5536 (12.0 MP, Other),
2160 x 3872 (8.4 MP, Other)
Image File Format: JPEG (EXIF 2.21), 12-bit RAW (.PEF, .DNG) JPEG, MPO, RAW (ARW 2.3), RAW+JPEG
Continuous-mode frames/second: 4.3 10.0
Video Capture
Can take movies: Yes Yes
Movie Resolution: 1280x720 (24)
640x416 (24)
1920x1080 (60p/​60i)
1440x1080 (30p)
640x480 (30p)
Movie File Format:   AVCHD 2.0 / MPEG-4 AVC (H.264) with Dolby Digital (AC3) / MPEG-4 AAC-LC audio
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 Vario-Tessar T*; 7 elements in 6 groups, including 4 aspheric elements, 7 blade aperture
Focal Length (35mm equivalent): 27 - 84mm 28 - 100mm
Focal Length (actual): 18 - 55mm 10.4 - 37.1mm
Zoom Ratio: 3.00x 3.60x
Aperture Range: f/3.5 - 22 (W), f/5.6 - 38 (T) f/1.8 (wide) / f/4.9 (tele) - f/11
Integrated ND Filter: No No
Normal Focus Range:   5 cm to Infinity
2.0 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 Yes
Digital Zoom Values: n/a Up to 2x Clear Image Zoom
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 Contrast Detection: Multi point AF (25 points) / Center weighted AF / Flexible spot / Flexible spot (tracking focus) / Flexible sport (face tracking)
Auto Focus Assist Light? Yes Yes
Manual Focus: Yes Yes
Viewfinder
Viewfinder: Optical / LCD No / LCD
Viewfinder Type: SLR type; fixed eye-level pentamirror, 96% coverage, 0.85x mag., -2.5 to +1.5 diopter  
Focus Peaking: No Yes
EVF Resolution: n/a n/a
Viewfinder Magnification (35mm equivalent): 0.57x  
Viewfinder Magnification (nominal/claimed): 0.85x  
Display
Eye-level Viewfinder: Yes No
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 No
Tilt Swivel Screen: No No
Selfie Screen: No No
Max Playback Zoom: 16.0x 13.6x
Top Deck Display: No No
Exposure
Maximum ISO (native): 6400 6400
Minimum ISO (native): 200 125
ISO Settings: Auto (200-6400), 100, 200, 400, 800, 1600, 3200, 6400; expandable to 12800 Auto, ISO 125-6400, with ISO 80 and 100 low extensions, up to 25600 with Multi Frame NR
Auto ISO Mode: Yes Yes
White Balance Settings: Auto, Daylight, Shade, Cloudy, Tungsten, Fluorescent (D, N, W, L), Flash, Custom Auto, Daylight, Shade, Cloudy, Incandescent, Fluorescent (Warm, Cool, Day, Daylight), Flash, Color Temp/Filter, Custom
Shutter Speed Range: 1/6000 - 30 sec 1/2000 - 30 sec
Bulb Mode: Yes Yes
Exposure Compensation: +/- 2.0EV in 0.3EV steps +/- 3.0EV in 0.3EV steps
Metering Modes: 16-segment Multi, Center-weighted, Spot Multi segment, 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 Portrait, Anti Motion Blur (6 shot layering), Sports Action, Pet, Gourmet, Macro, Landscape, Sunset, Night Scene, Hand-held Twilight, Night Portrait, Fireworks, High Sensitivity; DRO, Auto HDR, Auto Portrait Framing, Sweep Panorama; Picture Effect(s): Toy Camera, Pop Color, Posterization, 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, 10, Portrait1, Portrait2 seconds
Time Lapse (intervalometer):    
High Resolution Composite: No No
Flash
Built-in Flash: Yes Yes
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
Flash Guide Number (ISO 100): 11.3 m / 37.1 ft. n/a
Flash Range Description: Depends on lens ISO Auto: 0.30m to 17.1m (W) / 0.55m to 6.3m (T)
Max Flash Sync: 1/180 1/2000
Flash Exposure Compensation: -2 to +1 EV in 0.5EV steps +/- 2.0 EV in 0.3EV steps
External Flash Connection: Hot Shoe n/a
Built-In Wireless Flash Control: Full TTL exposure  
Image Storage
Usable Memory Types: SD / SDHC MS Duo / MS PRO Duo / SD / SDHC / SDXC
UHS Support:   No UHS support
Other Memory:    
Dual Card Slots: No No
RAW Capture Support: Yes Yes
Uncompressed Format: 12-bit RAW (.PEF, .DNG) RAW (ARW 2.3), RAW+JPEG
Movie File Format:   AVCHD 2.0 / MPEG-4 AVC (H.264) with Dolby Digital (AC3) / MPEG-4 AAC-LC audio
Included Memory: No memory included No memory included
Included Memory Type:    
Connectivity
Built-In Wi-Fi: No No
NFC: No No
Bluetooth: No No
Built-In GPS: No No
Microphone Jack: No No
Headphone Jack: No No
External Connections: USB 2.0 High Speed USB 2.0 High Speed
PictBridge Compliant: No No
DPOF Compliant: Yes Yes
Remote Control: Yes No
Remote Control Type: Optional IR  
Connections (extended): AC adapter available Micro HDMI (Type D) with BRAVIA Link
Performance Timing
Cycle time for JPEG shooting in single shot mode (seconds per frame, max resolution): 0.39 0.36
Cycle time for RAW shooting in single shot mode (seconds per frame): 0.43 0.66
Buffer size for RAW shooting in single shot mode (frames): 10 Unlimited
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 10.0
Buffer size for JPEG shooting in burst mode (frames, max resolution): 25 13
RAW shooting speed in burst mode (fps):   10.0
Buffer size for RAW shooting in burst mode (frames):   13
RAW+JPEG shooting speed in burst mode (fps):   10.0
Buffer Size for RAW+JPEG shooting in burst mode (frames):   10
Shutter lag (full AF, wide/mid): 0.10 seconds 0.15 seconds
Shutter lag (full AF, tele):   0.27 seconds
Shutter lag (full AF, live view - DSLR):    
Shutter lag (prefocused, live view - DSLR):    
Shutter Lag (manual focus): 0.082 seconds 0.032 seconds
Shutter lag (full AF, with flash): 0.23 seconds 0.37 seconds
Shutter Lag (prefocused): 0.082 seconds 0.013 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 2.8 seconds
Play -> Record Time: 0.2 seconds 1.1 seconds
Flash cycle time, full power: 3.3 seconds 7.2 seconds
Power
Battery Life, Stills (CIPA Rating Monitor/Live View):   330 shots
Battery Life, Still (CIPA Rating OVF/EVF): 420 shots (NiMH AA)  
Battery Life, Video:    
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: No
Internal Charging Supported: Yes
Software
Included Software: CD-ROM  
OS Compatibility: Windows XP/Vista/7, MacOS-X 10.3+  
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. Optical Image Stabilization, Programmable Control Ring, RAW Support, AF Assist/Peaking, Auto Portrait Framing, 13 Picture Effects, Face Registration/Detection, Smile Shutter, Soft Skin Effect, Sweep Panorama, Multi Aspect Recoding (3:2, 4:3, 16:9, 1:1), Digital Level Gauge, Dual Record, MS Duo/SDXC Multi Slot, Aluminum Body