• 35mm 861.6mm2
  • 24.6 megapixels
  • ISO 200 - 3200
  • 2/3 inch 58.1mm2
  • 12.0 megapixels
  • 28.00mm - 112.00mm (35mm eq.)
  • Detailed specifications
  • Sony Alpha DSLR-A850
  • Fujifilm X20
Links
Prices:    
Manufacturer URL: Manufacturer website Manufacturer website
Predecessor:   Fujifilm X10
X10 vs X20
Successor:   Fujifilm X30
X20 vs X30
General
Model Number: A850 X20
Alternate Model Number(s):    
Camera Format: Pro SLR Mid-Sized
Currently Manufactured: No No
Retail Price: $1999.95 $599.95
Street Price: $2,219.00 $499.00
Date Available: 2009-10-08 2013-03-30
Tripod Mount: Yes Yes
Weight: 30.0 oz (850 g) 12.7 oz (361 g)
includes batteries
Size: 6.2 x 4.6 x 3.2 in.
(156 x 117 x 82 mm)
4.6 x 2.7 x 2.2 in.
(117 x 70 x 57 mm)
Waterproof: No No
Waterproof Depth: n/a n/a
Image Sensor
Sensor Type: CMOS CMOS
Sensor Manufacturer: Sony  
Effective Megapixels: 24.6 12.0
Sensor Format: 35mm 2/3 inch
Sensor size: 861.6mm2 (35.90mm x 24.00mm) 58.08mm2 (8.8mm x 6.6mm)
Approximate Pixel Pitch: 5.94 microns 2.20 microns
Focal Length Multiplier: 1.0x n/a
Aspect Ratio: 3:2, 16:9 4:3
Color Filter Type: RGBG X-Trans II
Anti Aliasing Filter: Fixed  
Self-Cleaning: Yes No
Sensor shift image stabilization: Yes No
On-Sensor Phase Detect: No Yes
DxO Sensor Score: 79  
DxO Color Depth Score (bits): 23.8  
DxO Dynamic Range Score (evs): 12.2  
DxO Maximum Effective ISO Score (iso): 1,415  
Image Capture
Image Resolution: 6048 x 4032 (24.4 MP, 3:2),
6048 x 3408 (20.6 MP, Other),
4400 x 2936 (12.9 MP, 3:2),
4400 x 2472 (10.9 MP, 16:9),
3984 x 2656 (10.6 MP, 3:2),
3024 x 2016 (6.1 MP, 3:2),
2896 x 1928 (5.6 MP, 3:2),
3024 x 1704 (5.2 MP, Other),
1984 x 1320 (2.6 MP, 3:2)
4000 x 3000 (12.0 MP, 4:3),
4000 x 2664 (10.7 MP, 3:2),
4000 x 2248 (9.0 MP, 16:9),
2992 x 2992 (9.0 MP, 1:1),
2816 x 2112 (5.9 MP, 4:3),
2816 x 1864 (5.2 MP, Other),
2816 x 1584 (4.5 MP, 16:9),
2112 x 2112 (4.5 MP, 1:1),
2048 x 1536 (3.1 MP, 4:3),
2048 x 1360 (2.8 MP, Other),
1920 x 1080 (2.1 MP, 16:9),
1536 x 1536 (2.4 MP, 1:1),
11520 x 1624 (18.7 MP, Other),
11520 x 1080 (12.4 MP, Other),
9600 x 1624 (15.6 MP, Other),
9600 x 1080 (10.4 MP, Other),
7680 x 1624 (12.5 MP, Other),
7680 x 1080 (8.3 MP, Other),
5760 x 1624 (9.4 MP, Other),
5760 x 1080 (6.2 MP, Other),
3840 x 1624 (6.2 MP, Other),
3840 x 1080 (4.1 MP, Other)
Image File Format: JPEG (EXIF 2.21), RAW, cRAW, RAW+JPEG; (ARW 2.0) JPEG (Exif Ver 2.3), RAW (RAF format), RAW + JPEG
Continuous-mode frames/second: 3.0 12.0
Video Capture
Can take movies: No Yes
Movie Resolution: 1920x1080 (60p)
1280x720 (60p)
640x480 (30p)
Movie File Format:   H.264 (MOV) with stereo sound
Composite Video Out: Yes No
NTSC/PAL Switchable Video: Yes n/a
Video Usable as Viewfinder: No n/a
HD Video Out: Yes Yes
HD Video Connection: HDMI HDMI
Lens & Optics
Lens Mount: Sony Alpha (Minolta A) n/a
Lens: n/a Fujinon optical zoom lens; 9 groups 11 lenses (3 aspherical glass molded lenses included)
Focal Length (35mm equivalent):   28 - 112mm
Focal Length (actual):   7.1 - 28.4mm
Zoom Ratio:   4.00x
Aperture Range:   f/2.0 (W) / f/2.8 (T) - f/11 (7-blade aperture diaphragm)
Integrated ND Filter: No No
Normal Focus Range:   50 cm to Infinity
19.7 in to Infinity
Macro Focus Range:   1 - 100 cm
0.4 - 39.4 in
Filter Thread: n/a 52.0mm
Thread Type: n/a Via optional adapter ring
Optical Image Stabilization: No Yes
Digital Zoom: No Yes
Digital Zoom Values: n/a Up to 2x
Auto Focus
Auto Focus: Yes Yes
Auto Focus Type: 9-point TTL phase detection with 10 assist points, center dual-cross at f/2.8. Intelligent Hybrid AF (TTL contrast AF / TTL phase detection AF): Multi, Area, Tracking
Auto Focus Assist Light? Yes Yes
Manual Focus: Yes Yes
Viewfinder
Viewfinder: Optical / LCD (playback only) Optical / LCD
Viewfinder Type: SLR type; eye-level pentaprism with 98% coverage, 0.74x mag., 20mm eyepoint, -3 to +1 diopter Optical viewfinder equipped with digital trans panel, ~85% coverage, built-in eye sensor, diopter adjustment
Focus Peaking: No Yes
EVF Resolution: n/a n/a
Viewfinder Magnification (35mm equivalent): 0.74x  
Viewfinder Magnification (nominal/claimed): 0.74x  
Display
Eye-level Viewfinder: Yes Yes
Rear Display: Yes Yes
Rear Display Size (inches): 3.0 2.8
Rear Display Resolution: 921,600 dots 460,000 dots
Touchscreen: No No
Articulating Screen: No No
Tilt Swivel Screen: No No
Selfie Screen: No No
Max Playback Zoom: 19.0x  
Top Deck Display: Yes
Exposure
Maximum ISO (native): 3200 12800
Minimum ISO (native): 200 100
ISO Settings: Auto, 200-3200, Extensions to 100 and 6400 Auto, 100, 200, 250, 320, 400, 500, 640, 800, 1000, 1250, 1600, 2000, 2500, 3200, 4000, 5000, 6400, 12800
Auto ISO Mode: Yes Yes
White Balance Settings: Auto, Daylight, Shade, Cloudy, Tungsten, Fluorescent, Flash, Color Temperature from 2,500K to 9,900K, Custom (3) Fine, Shade, Fluorescent light (Daylight), Fluorescent light (Warm White), Fluorescent light (Cool White), Incandescent light, Underwater, Custom, Color temperature selection
Shutter Speed Range: 1/8000 - 30 sec 1/4000 - 30 sec
Bulb Mode: Yes No
Exposure Compensation: +/- 3.0EV in 0.3EV steps +/- 2.0EV in 0.3EV steps
Metering Modes: 40-segment Honeycomb Pattern, 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:   Portrait, Portrait Enhancer, Landscape, Sport, Night, Night (Tripod), Fireworks, Sunset, Snow, Beach, Party, Flower, Text, Underwater; Film Simulation, Motion Panorama 360, Pro focus, Pro low light, Advanced Anti Blur, Multiple Exposure.
Self Timer: 2 or 10 seconds 10 or 2 seconds
Time Lapse (intervalometer):    
High Resolution Composite: No No
Flash
Built-in Flash: No Yes
Flash Modes: n/a Red-eye removal OFF : Auto, Forced Flash, Suppressed Flash, Slow Synchro. Red-eye removal ON : Red-eye Reduction Auto, Red-eye Reduction & Forced Flash, Suppressed Flash, Red-eye Reduction & Slow Synchro.
Flash Guide Number (ISO 100): n/a n/a
Flash Range Description: n/a ISO AUTO (800): Wide : Approx. 50 cm - 7.0 m / 1.6 ft. - 22.9 ft. Telephoto : Approx. 80 cm - 5.0 m / 2.6 ft. - 16.4 ft.
Max Flash Sync: 1/250 1/1000
Flash Exposure Compensation: +/- 3.0 EV in 0.3EV steps  
External Flash Connection: Hot shoe, PC-sync Hot Shoe
Built-In Wireless Flash Control:   Trigger Only
Image Storage
Usable Memory Types: CF1 / CF2 / MS Duo / MS PRO Duo / Microdrive SD / SDHC / SDXC
UHS Support:    
Other Memory:    
Dual Card Slots: Yes No
RAW Capture Support: Yes Yes
Uncompressed Format: RAW, cRAW, RAW+JPEG; (ARW 2.0) RAW (RAF format), RAW + JPEG
Movie File Format:   H.264 (MOV) with stereo sound
Included Memory:    
Included Memory Type:    
Connectivity
Built-In Wi-Fi: No No
NFC:
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 Yes
DPOF Compliant: Yes Yes
Remote Control: Yes Yes
Remote Control Type: Optional wired or wireless  
Connections (extended): DC input, Multi-connector, Sync termimal, Remote terminal, HDMI Type-C minijack Mini HDMI (Type C), USB/Microphone input (only with MIC - ST1 with adapter sold separately)
Performance Timing
Cycle time for JPEG shooting in single shot mode (seconds per frame, max resolution): 0.40  
Cycle time for RAW shooting in single shot mode (seconds per frame): 0.50  
Buffer size for RAW shooting in single shot mode (frames): 23  
Cycle time for RAW+JPEG shooting in single shot mode (seconds per shot):    
Camera penalizes early shutter press? Yes
JPEG shooting speed in burst mode (fps, max resolution): 3.0 12.0
Buffer size for JPEG shooting in burst mode (frames, max resolution): 23 11
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): 0.18 seconds  
Shutter lag (full AF, tele):    
Shutter lag (full AF, live view - DSLR):    
Shutter lag (prefocused, live view - DSLR):    
Shutter Lag (manual focus): 0.154 seconds  
Shutter lag (full AF, with flash):    
Shutter Lag (prefocused): 0.074 seconds  
Shutter Lag (notes):    
Startup Time: 0.5 seconds  
Play -> Record Time: 0.3 seconds  
Flash cycle time, full power:    
Power
Battery Life, Stills (CIPA Rating Monitor/Live View):   270 shots
Battery Life, Still (CIPA Rating OVF/EVF): 880 shots  
Battery Life, Video:    
Battery Form Factor: Proprietary Proprietary NP-50
Usable Battery Types: NP-FM500H Lithium-ion rechargeable Lithium-ion rechargeable
Batteries Included: 1 x Proprietary NP-FM500H Lithium-ion rechargeable 1 x Proprietary NP-50 Lithium-ion rechargeable
Battery Charger Included (dedicated charger or AC/USB adapter): Yes Yes
Dedicated Battery Charger Included:
Internal Charging Supported:
Software
Included Software: Image Data Converter SR, Image Data Lightbox SR, Remote Camera Control (all Windows & Macintosh), Picture Motion Browser (Windows only). Fujifilm CD-ROM
OS Compatibility: Windows 2000Pro/XP/Vista; Mac OS X (v 10.1.3+) Viewer: Windows8/7/Vista/XP, MacOS X 10.6+
Miscellaneous
Notes & Features: Cost reduced Sony A900. Smaller viewfinder (98% vs 100%), slower burst mode (3 fps vs 5), wireless remote not included. New 12 MP 2/3” X-Trans CMOS II sensor, Improved EXR Processor II, Intelligent Hybrid AF. Available in black or two-tone silver and black.