• APS-C 368.2mm2
  • 14.6 megapixels
  • ISO 100 - 3200
  • APS-C 366.6mm2
  • 16.1 megapixels
  • ISO 200 - 16,000
  • Detailed specifications
  • Pentax K20D
  • Sony Alpha NEX-3N
Links
Prices:   Compare Prices
Manufacturer URL: Manufacturer website Manufacturer website
Predecessor: Pentax K10D
K10D vs K20D
Sony NEX-3
NEX-3 vs NEX-3N
Successor: Pentax K-7
K20D vs K-7
Sony A5000
NEX-3N vs A5000
General
Model Number: K20D NEX-3N
Alternate Model Number(s):    
Camera Format: Pro SLR Compact System Camera
Currently Manufactured: No No
Retail Price: $799.95 $500.00
Street Price:   $499.00
Date Available: 2008-04-30 2013-04-15
Tripod Mount: Yes Yes
Weight: 28.3 oz (802 g)
includes batteries
13.7 oz (389 g)
includes batteries, kit lens
Size: 5.6 x 4.0 x 2.8 in.
(142 x 102 x 70 mm)
4.3 x 2.4 x 1.4 in.
(110 x 62 x 35 mm)
Waterproof: No No
Waterproof Depth: n/a n/a
Image Sensor
Sensor Type: CMOS CMOS
Sensor Manufacturer:   Sony Exmor APS HD
Effective Megapixels: 14.6 16.1
Sensor Format: APS-C APS-C
Sensor size: 368.16mm2 (23.60mm x 15.60mm) 366.6mm2 (23.50mm x 15.60mm)
Approximate Pixel Pitch: 5.05 microns 4.78 microns
Focal Length Multiplier: 1.5x 1.5x
Aspect Ratio: 3:2 3:2
Color Filter Type: RGBG RGBG
Anti Aliasing Filter: Fixed Fixed
Self-Cleaning: Yes Yes
Sensor shift image stabilization: Yes No
On-Sensor Phase Detect: No No
DxO Sensor Score: 65 74
DxO Color Depth Score (bits): 22.9 22.8
DxO Dynamic Range Score (evs): 11.1 12.5
DxO Maximum Effective ISO Score (iso): 639 1,067
Image Capture
Image Resolution: 4672 x 3104 (14.5 MP, Other),
3872 x 2592 (10.0 MP, Other),
3008 x 2000 (6.0 MP, 3:2),
1824 x 1216 (2.2 MP, 3:2)
4912 x 3264 (16.0 MP, 3:2),
4912 x 2760 (13.6 MP, 16:9),
3568 x 2368 (8.4 MP, Other),
3568 x 2000 (7.1 MP, 16:9),
2448 x 1624 (4.0 MP, Other),
2448 x 1376 (3.4 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), RAW (.PEF, .DNG) JPEG, MPO, .ARW 2.3 RAW, RAW+JPEG
Continuous-mode frames/second: 2.8 4.0
Video Capture
Can take movies: No Yes
Movie Resolution: 1920x1080 (60i or 24p (24/​17Mbps))
1440x1080 (30p/​12Mbps)
640x480 (30p/​3Mbps)
Movie File Format:   AVCHD / MP4; Audio: 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) Sony E
Lens: n/a Sony SELP1650 PZ 16-50mm f/3.5-5.6 OSS; 9 elements in 8 groups, 4 aspheric surfaces
Focal Length (35mm equivalent):   24 - 75mm
Focal Length (actual):   16 - 50mm
Zoom Ratio:   3.13x
Aperture Range:   f/3.5 - f/22 (W) / f/5.6 - f/36 (T); 7-blade circular aperture
Integrated ND Filter: No No
Normal Focus Range:   25 cm to Infinity
9.8 in to Infinity
Macro Focus Range:    
Filter Thread: n/a 40.5mm
Thread Type: n/a n/a
Optical Image Stabilization: No Yes
Digital Zoom: No Yes
Digital Zoom Values: n/a Up to 4x; up to 2x Clear Image Digital Zoom
Auto Focus
Auto Focus: Yes Yes
Auto Focus Type: 11-point TTL phase-matching (SAFOX VIII) Contrast Detect: Multi Point (25 points), Center, Flexible Spot, with Face Detection
Auto Focus Assist Light? Yes Yes
Manual Focus: Yes Yes
Viewfinder
Viewfinder: Optical / LCD No / LCD
Viewfinder Type: SLR type; eye-level pentaprism, coverage: 95%, magnification: 0.95x, diopter: -2.5 to 1.5  
Focus Peaking: No Yes
EVF Resolution: n/a n/a
Viewfinder Magnification (35mm equivalent): 0.63x  
Viewfinder Magnification (nominal/claimed): 0.95x  
Display
Eye-level Viewfinder: Yes No
Rear Display: Yes Yes
Rear Display Size (inches): 2.7 3.0
Rear Display Resolution: 230,000 dots 460,800 dots (153,600 px)
Touchscreen: No No
Articulating Screen: No Yes
Tilt Swivel Screen: No
Selfie Screen: No
Max Playback Zoom: 32.0x 13.6x
Top Deck Display: Yes No
Exposure
Maximum ISO (native): 3200 16000
Minimum ISO (native): 100 200
ISO Settings: Auto, 100, 200, 400, 800, 1600, 3200, 6400 (expanded) Auto, 200, 400, 800, 1600, 3200, 6400, 12800, 16000
Auto ISO Mode: Yes Yes
White Balance Settings: Auto, Daylight, Shade, Cloudy, Tungsten, Fluorescent (W, D, N), Flash, Color Temperature Auto, Daylight, Shade, Cloudy, Incandescent, Fluorescent, Flash, Color Temp./Filter, Custom
Shutter Speed Range: 1/4000 - 30 sec 1/4000 - 30 sec
Bulb Mode: Yes Yes
Exposure Compensation: +/- 3.0EV in 0.3EV steps +/- 3.0EV in 0.3EV steps
Metering Modes: TTL open-aperture: 16-segment, Center-weighted, Spot 1200-zone 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: Sensitivity Priority, Shutter and Aperture Priority Scene Modes: Portrait, Landscape, Macro, Sports Action, Sunset, Night Portrait, Night View, Handheld Twilight, Anti Motion Blur; Picture Effects: Posterization (Color, B/W), Pop Color, Retro Photo, Partial Color (R,G,B,Y), High Contrast Mono, Toy Camera, Soft High-key, Soft Focus, HDR Painting, Rich-tone Mono, Miniature; Sweep Panorama
Self Timer: 2 or 12 seconds 2, 10, Self-portrait, 3 or 5 shots after 10 seconds
Time Lapse (intervalometer):    
High Resolution Composite: No No
Flash
Built-in Flash: Yes Yes
Flash Modes: On, Redeye, Slow Sync, Slow Sync + Redeye, Trailing Curtain Sync, Wireless Flash Off, Autoflash, Fill-flash, Slow sync., Rear-Sync.; Red-eye Reduction On/Off
Flash Guide Number (ISO 100): 13.0 m / 42.7 ft. 4.0 m / 13.1 ft.
Flash Range Description: Depends on lens Lens dependent
Max Flash Sync: 1/180 1/160
Flash Exposure Compensation: -2 to +1 EV in 0.3EV steps +/- 2.0 EV in 0.3EV steps
External Flash Connection: Hot Shoe, PC-Sync Socket n/a
Built-In Wireless Flash Control: Full TTL exposure  
Image Storage
Usable Memory Types: SD / SDHC MS PRO Duo / SD / SDHC / SDXC
UHS Support:    
Other Memory:    
Dual Card Slots: No No
RAW Capture Support: Yes Yes
Uncompressed Format: RAW (.PEF, .DNG) .ARW 2.3 RAW, RAW+JPEG
Movie File Format:   AVCHD / MP4; Audio: Dolby Digital (AC-3) / MPEG-4 AAC-LC, stereo
Included Memory: No memory included No memory included
Included Memory Type:    
Connectivity
Built-In Wi-Fi: No No
NFC: 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: Yes No
DPOF Compliant: Yes Yes
Remote Control: Yes No
Remote Control Type: Wired or IR  
Connections (extended): DC input, wired remote Micro HDMI (Type D)
Performance Timing
Cycle time for JPEG shooting in single shot mode (seconds per frame, max resolution): 0.39 0.79
Cycle time for RAW shooting in single shot mode (seconds per frame): 0.36 0.90
Buffer size for RAW shooting in single shot mode (frames): 11 Unlimited
Cycle time for RAW+JPEG shooting in single shot mode (seconds per shot):    
Camera penalizes early shutter press? No No
JPEG shooting speed in burst mode (fps, max resolution): 2.8 4.0
Buffer size for JPEG shooting in burst mode (frames, max resolution): 38 6
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): 0.17 seconds 0.27 seconds
Shutter lag (full AF, tele):    
Shutter lag (full AF, live view - DSLR):    
Shutter lag (prefocused, live view - DSLR):    
Shutter Lag (manual focus): 0.090 seconds 0.108 seconds
Shutter lag (full AF, with flash): 0.24 seconds 0.39 seconds
Shutter Lag (prefocused): 0.089 seconds 0.022 seconds
Shutter Lag (notes): Live View: Full AF = n/a Prefocused = 0.659s Prefocused with flash = 2.395s Full Autofocus lag, Multi-area AF mode = 0.270s
Startup Time: 0.4 seconds 2.2 seconds
Play -> Record Time: 0.5 seconds 1.0 seconds
Flash cycle time, full power: 3.1 seconds 1.8 seconds
Power
Battery Life, Stills (CIPA Rating Monitor/Live View):   480 shots
Battery Life, Still (CIPA Rating OVF/EVF): 530 shots  
Battery Life, Video:    
Battery Form Factor: Proprietary D-LI50 Proprietary InfoLithium NP-FW50
Usable Battery Types: Lithium-ion rechargeable Lithium-ion rechargeable
Batteries Included: 1 x Proprietary D-LI50 Lithium-ion rechargeable 1 x Proprietary NP-FW50 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: CD-ROM S-SW74/75 PlayMemories Home, Image Data Converter 4
OS Compatibility: Windows XP/Vista, MacOS 10.2 or later Windows XP SP3/Vista SP2/7 SP1/8; Mac OS X v10.5 or later. (Software is Windows only.)
Miscellaneous
Notes & Features: PENTAX-developed Shake Reduction (SR) system; Weather and dust resistant body; Live View mode that allows users to see the full image area to confirm composition, focus status and lighting on the large 2.7 inch LCD monitor; Expanded Dynamic Range function; Improved Dust Reduction system that features the new Dust Alert function to pinpoint the exact location of dust particles for the photographer to remove. World's smallest, lightest interchangeable lens camera with APS-C sensor, 3" 460K-dot tilting LCD, Full HD 1080i60 video. Available in black or white.