Pentax K-x vs Ricoh GXR Specifications

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APS-C 369.7mm²
12.4 megapixels
ISO 200 - 6400

Go in depth with our full Pentax K-x Review.
See real-world photos taken with the K-x.

APS-C 369.7mm²
12.3 megapixels

Go in depth with our full Ricoh GXR Review.

Detailed specifications
Pentax K-x
Ricoh GXR

Links
Prices:
Manufacturer URL:	Manufacturer website	Manufacturer website
Predecessor:	Pentax K2000 K2000 vs K-x
Successor:	Pentax K-r K-x vs K-r
General
Model Number:	K-x	GXR
Alternate Model Number(s):
Camera Format:	SLR	Other
Currently Manufactured:	No	No
Retail Price:	$649.95	$1380.00
Street Price:	$701.76
Date Available:	2009-10-15	2009-12-31
Tripod Mount:	Yes	Yes
Weight:	27.9 oz (791 g) includes batteries, kit lens	14.9 oz (423 g)
Size:	4.8 x 3.6 x 2.7 in. (122 x 92 x 69 mm)	4.5 x 2.8 x 3.0 in. (114 x 70 x 77 mm)
Waterproof:	No	No
Waterproof Depth:	n/a	n/a

Image Sensor
Sensor Type:	CMOS	CMOS
Sensor Manufacturer:
Effective Megapixels:	12.4	12.3
Sensor Format:	APS-C	APS-C
Sensor size:	369.72mm² (23.7mm x 15.6mm)	369.72mm² (23.7mm x 15.6mm)
Approximate Pixel Pitch:	5.53 microns	5.53 microns
Focal Length Multiplier:	1.5x	n/a
Aspect Ratio:	3:2	4:3
Color Filter Type:	RGBG
Anti Aliasing Filter:	Fixed
Self-Cleaning:	Yes	No
Sensor shift image stabilization:	Yes	No
On-Sensor Phase Detect:	No	No
DxO Sensor Score:	72
DxO Color Depth Score (bits):	22.8
DxO Dynamic Range Score (evs):	12.5
DxO Maximum Effective ISO Score (iso):	811
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)	4288 x 2848 (12.2 MP, Other), 3776 x 2832 (10.7 MP, 4:3), 4288 x 2416 (10.4 MP, Other), 2848 x 2848 (8.1 MP, 1:1), 3456 x 2304 (8.0 MP, 3:2), 3072 x 2304 (7.1 MP, 4:3), 3456 x 1944 (6.7 MP, 16:9), 2304 x 2304 (5.3 MP, 1:1), 2592 x 1944 (5.0 MP, 4:3), 2048 x 1536 (3.1 MP, 4:3), 1280 x 960 (1.2 MP, 4:3), 640 x 480 (0.3 MP, 4:3)
Image File Format:	JPEG (EXIF 2.21), 12-bit RAW (.PEF, .DNG)	JPEG (EXIF v2.21), .DNG Raw
Continuous-mode frames/second:	4.3	3.0
Video Capture
Can take movies:	Yes	Yes
Movie Resolution:	1280x720 (24) 640x416 (24)	1280x720 (24) 640x480 (24) 320x240 (24)
Movie File Format:		AVI (OpenDML Motion JPEG)
Composite Video Out:	Yes	Yes
NTSC/PAL Switchable Video:	Yes	Yes
Video Usable as Viewfinder:	No
HD Video Out:	No	Yes
HD Video Connection:		HDMI

Lens & Optics
Lens Mount:	Pentax K (KA/KAF/KAF2/3)	Ricoh GXR
Lens:	smc Pentax DA L 18-55mm f/3.5-5.6 AL	n/a
Focal Length (35mm equivalent):	27 - 84mm
Focal Length (actual):	18 - 55mm	33 - 50mm
Zoom Ratio:	3.00x
Aperture Range:	f/3.5 - 22 (W), f/5.6 - 38 (T)	f/2.5 - f/22
Integrated ND Filter:	No	No
Normal Focus Range:		30 cm to Infinity 11.8 in to Infinity
Macro Focus Range:		7 cm to Infinity 2.8 in to Infinity
Filter Thread:	52.0mm	n/a
Thread Type:	n/a	n/a
Optical Image Stabilization:	No	No
Digital Zoom:	No	Yes
Digital Zoom Values:	n/a	4x (3.6x for movies)
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 / spot
Auto Focus Assist Light?	Yes	No
Manual Focus:	Yes	Yes
Viewfinder
Viewfinder:	Optical / LCD	LCD
Viewfinder Type:	SLR type; fixed eye-level pentamirror, 96% coverage, 0.85x mag., -2.5 to +1.5 diopter
Focus Peaking:	No	No
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	920,000 dots
Touchscreen:	No	No
Articulating Screen:	No	No
Tilt Swivel Screen:	No	No
Selfie Screen:	No	No
Max Playback Zoom:	16.0x	16.0x
Top Deck Display:	No

Exposure
Maximum ISO (native):	6400
Minimum ISO (native):	200
ISO Settings:	Auto (200-6400), 100, 200, 400, 800, 1600, 3200, 6400; expandable to 12800	Auto, 200, 400, 800, 1600, 3200
Auto ISO Mode:	Yes	No
White Balance Settings:	Auto, Daylight, Shade, Cloudy, Tungsten, Fluorescent (D, N, W, L), Flash, Custom	Auto, Multi-P AUTO, Outdoors, Cloudy, Incandescent Lamp, Fluorescent Lamp, Manual Setting
Shutter Speed Range:	1/6000 - 30 sec	1/3200 - 180 sec
Bulb Mode:	Yes	No
Exposure Compensation:	+/- 2.0EV in 0.3EV steps	+/- 4.0EV in 0.3EV steps
Metering Modes:	16-segment Multi, Center-weighted, Spot	TTL by CCD, 256-segment multi, center-weighted or 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	Movie, portrait, sports, landscape, nightscape, skew correction
Self Timer:	2 or 12 seconds	2 or 10 seconds
Time Lapse (intervalometer):		Yes
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, red-eye, on, slow sync, manual (FULL, 1/1.4, 1/2, 1/2.8, 1/4, 1/5.6, 1/8, 1/11, 1/16, 1/22, 1/32, 1/64), off
Flash Guide Number (ISO 100):	11.3 m / 37.1 ft.	n/a
Flash Range Description:	Depends on lens	20cm - 3m (ISO AUTO)
Max Flash Sync:	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:	Full TTL exposure
Image Storage
Usable Memory Types:	SD / SDHC	SD / SDHC
UHS Support:
Other Memory:
Dual Card Slots:	No	No
RAW Capture Support:	Yes	Yes
Uncompressed Format:	12-bit RAW (.PEF, .DNG)	.DNG Raw
Movie File Format:		AVI (OpenDML Motion JPEG)
Included Memory:	No memory included	86.0 MB
Included Memory Type:		built-in memory
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	No
Remote Control:	Yes	No
Remote Control Type:	Optional IR
Connections (extended):	AC adapter available

Performance Timing
Cycle time for JPEG shooting in single shot mode (seconds per frame, max resolution):	0.39
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):
Camera penalizes early shutter press?	No
JPEG shooting speed in burst mode (fps, max resolution):	4.3	3.0
Buffer size for JPEG shooting in burst mode (frames, max resolution):	25	15
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):	0.10 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
Shutter lag (full AF, with flash):	0.23 seconds
Shutter Lag (prefocused):	0.082 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
Play -> Record Time:	0.2 seconds
Flash cycle time, full power:	3.3 seconds
Power
Battery Life, Stills (CIPA Rating Monitor/Live View):		320 shots
Battery Life, Still (CIPA Rating OVF/EVF):	420 shots (NiMH AA)
Battery Life, Video:
Battery Form Factor:	4 x AA	Proprietary DB-90
Usable Battery Types:	Lithium, Alkaline disposables; NiMH rechargeables	3.6V Lithium-ion rechargeable
Batteries Included:	4 x AA Alkaline disposables
Battery Charger Included (dedicated charger or AC/USB adapter):	No	No
Dedicated Battery Charger Included:
Internal Charging Supported:
Software
Included Software:	CD-ROM	DL-10, Irodio Photo and Video Studio, Adobe Reader, VM-1 for Mac
OS Compatibility:	Windows XP/Vista/7, MacOS-X 10.3+	Windows, Mac OS
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.	Sensor and lens are interchangeable as one unit. Specs above are with the 12.3 megapixel APS-C CMOS sensor and 33mm (50mm equivalent) fixed focal length lens. Also available is a 1/1.7" ten megapixel CCD sensor with 5.1-15.3mm (24-72mm equivalent) lens. With this combination, maximum aperture varies from f/2.5 to f/4.4 across the zoom range, macro shooting distance drops to 1cm, sensor shift image stabilization becomes available, fastest shutter speed falls to 1/2000 sec., minimum ISO sensitivity is expanded to 100, flash range is 20cm-4.5m at wide angle and 15cm to 2.7m at telephoto, zoom macro scene mode is added, noise reduction is automatically applied above ISO 800, burst rate drops to 1.6 frames per second, HD movie mode is dropped and framerate increases to 30fps, battery life increases to 410 shots, body depth drops to 44.4mm, and body-only weight falls to 325 grams. Price estimate is based on US street pricing at launch - $550 for the camera body plus $830 for the APS-C fixed lens block. The 1/1.7" zoom lens block is another $440.