• APS-C 369.7mm2
  • 24.3 megapixels
  • ISO 100 - 16,000
  • APS-C 368.2mm2
  • 24.3 megapixels
  • ISO 200 - 12,800
  • Detailed specifications
  • Sony Alpha SLT-A77
  • Fujifilm X-T20
Links
Prices: Compare Prices Compare Prices
Manufacturer URL: Manufacturer website Manufacturer website
Predecessor:   Fujifilm X-T10
X-T10 vs X-T20
Successor: Sony A77 II
A77 vs A77 II
Fujifilm X-T30
X-T20 vs X-T30
General
Model Number: A77 X-T20
Alternate Model Number(s):    
Camera Format: SLR Compact System Camera
Currently Manufactured: No Yes
Retail Price: $1999.99 $1199.95
Street Price: $1,899.00 $699.00
Date Available: 2011-10-15 2017-02-28
Tripod Mount: Yes Yes
Weight: 48.1 oz (1,363 g)
includes batteries, kit lens
25.2 oz (713 g)
includes batteries, kit lens
Size: 5.6 x 4.1 x 3.2 in.
(143 x 104 x 81 mm)
4.7 x 3.3 x 1.6 in.
(118 x 83 x 41 mm)
Waterproof: No No
Waterproof Depth: n/a n/a
Image Sensor
Sensor Type: CMOS CMOS
Sensor Manufacturer: Sony  
Effective Megapixels: 24.3 24.3
Sensor Format: APS-C APS-C
Sensor size: 369.72mm2 (23.7mm x 15.6mm) 368.16mm2 (23.60mm x 15.60mm)
Approximate Pixel Pitch: 3.95 microns 3.93 microns
Focal Length Multiplier: 1.5x 1.5x
Aspect Ratio: 3:2 3:2
Color Filter Type: RGBG X-Trans 3
Anti Aliasing Filter: Fixed Not needed
Self-Cleaning: Yes Yes
Sensor shift image stabilization: Yes No
On-Sensor Phase Detect: No Yes
DxO Sensor Score: 78  
DxO Color Depth Score (bits): 24.0  
DxO Dynamic Range Score (evs): 13.2  
DxO Maximum Effective ISO Score (iso): 801  
Image Capture
Image Resolution: 6000 x 4000 (24.0 MP, 3:2),
6000 x 3376 (20.3 MP, 16:9),
4240 x 2832 (12.0 MP, 3:2),
4240 x 2400 (10.2 MP, Other),
3008 x 2000 (6.0 MP, 3:2),
3008 x 1688 (5.1 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),
7152 x 1080 (7.7 MP, Other),
4912 x 1080 (5.3 MP, Other),
1920 x 1080 (2.1 MP, 16:9)
6000 x 4000 (24.0 MP, 3:2),
6000 x 3376 (20.3 MP, 16:9),
4000 x 4000 (16.0 MP, 1:1),
4240 x 2832 (12.0 MP, 3:2),
4240 x 2384 (10.1 MP, 16:9),
2832 x 2832 (8.0 MP, 1:1),
3008 x 2000 (6.0 MP, 3:2),
3008 x 1688 (5.1 MP, 16:9),
2000 x 2000 (4.0 MP, 1:1),
9600 x 1440 (13.8 MP, Other),
2160 x 9600 (20.7 MP, Other),
6400 x 1440 (9.2 MP, Other),
2160 x 6400 (13.8 MP, Other)
Image File Format: JPEG (EXIF 2.3), MPO (3D), 12-bit RAW (ARW 2.3), RAW+JPEG JPEG (Exif Ver 2.3), .RAF 14-bit RAW (lossless compressed or uncompressed); RAW + JPEG
Continuous-mode frames/second: 11.6 13.7
Video Capture
Can take movies: Yes Yes
Movie Resolution: 1920x1080 (60p/​28Mbps/​PS or 60i/​24Mbps/​FX or 60i/​17Mbps/​FH or 24p/​24Mbps/​FX or 24p/​17Mbps/​FH)
1440x1080 (30p/​12Mbps)
640x480 (30p/​3Mbps)
3840x2160 (30p/​25p/​24p/​23.98p)
1920x1080 (60p/​50p/​30p/​25p/​24p/​23.98p)
1280x720 (60p/​50p/​30p/​25p/​24p/​23.98p)
Movie File Format: AVCHD 2.0 / MP4; Audio :Dolby Digital (AC-3) / MPEG-4 AAC-LC, stereo MOV (MPEG-4 AVC / H.264, Audio: Linear PCM 48KHz stereo sound)
Composite Video Out: No No
NTSC/PAL Switchable Video: n/a n/a
Video Usable as Viewfinder: n/a n/a
HD Video Out: Yes Yes
HD Video Connection: HDMI HDMI
Lens & Optics
Lens Mount: Sony Alpha (Minolta A) Fujifilm X
Lens: Sony 16-50mm f/2.8 DT SSM (SAL1650) Fujinon XF 18-55mm f/2.8-4 R LM OIS; 14 elements in 10 groups, including 3 aspherical lenses and 1 extra low dispersion element
Focal Length (35mm equivalent): 24 - 75mm 27 - 84mm
Focal Length (actual): 16 - 50mm 18 - 55mm
Zoom Ratio: 3.13x 3.06x
Aperture Range: f/2.8 - f/22 (W/T) f/2.8 (wide) / f/4 (tele) - f/22
Integrated ND Filter: No No
Normal Focus Range: 30 cm to Infinity
11.8 in to Infinity
30 cm to Infinity
11.8 in to Infinity
Macro Focus Range:    
Filter Thread: n/a 58.0mm
Thread Type: n/a n/a
Optical Image Stabilization: No Yes
Digital Zoom: Yes No
Digital Zoom Values: 1.4x / 2x n/a
Auto Focus
Auto Focus: Yes Yes
Auto Focus Type: Phase Detection: 19 points (11 points cross type); Wide (auto, 19 points), Zone, Spot, Local Hybrid Phase/Contrast Detect AF: 325 points total, 169 phase-detect points; Single point AF: EVF/LCD: 13x7 / 25x13 (changeable size of AF frame among 5 types), Zone AF: 3x3 / 5x5 / 7x7 from 91 areas on 13x7 grid, Wide/Tracking AF: Up to 18 area; Touch AF supported
Auto Focus Assist Light? Yes Yes
Manual Focus: Yes Yes
Viewfinder
Viewfinder: EVF / LCD EVF / LCD
Viewfinder Type: EVF type; 1.3cm (0.5") 2,359K-dot OLED, 100% coverage, 1.09x mag., 22mm eyepoint, -4 to +3 diopter EVF: 0.39-inch 2.36M-dot OLED with 100% coverage, 0.62x magnification (35mm equivalent), 17.5mm eyepoint (from the rear end of the camera's eyepiece), -4 to +2 diopter adjustment, eye sensor
Focus Peaking: Yes Yes
EVF Resolution: 2,359,000 dots 2,360,000 dots
Viewfinder Magnification (35mm equivalent): 0.73x 0.62x
Viewfinder Magnification (nominal/claimed): 1.09x 0.93x
Display
Eye-level Viewfinder: Yes Yes
Rear Display: Yes Yes
Rear Display Size (inches): 3.0 3.0
Rear Display Resolution: 921,600 dots (307,200 px) 1,040,000 dots
Touchscreen: No Yes
Articulating Screen: Yes Yes
Tilt Swivel Screen: Yes No
Selfie Screen: Yes No
Max Playback Zoom: 13.6x  
Top Deck Display: Yes No
Exposure
Maximum ISO (native): 16000 12800
Minimum ISO (native): 100 200
ISO Settings: Auto (100-12800 with selectable limits), 50 (expanded), 100, 200, 400, 800, 1600, 3200, 6400, 12800, 16000. (Multi-frame NR mode up to ISO 25600) AUTO with selectable limit, ISO 200-12800, Extended output sensitivity equivalent ISO 100, 25600 and 51200
Auto ISO Mode: Yes Yes
White Balance Settings: Auto WB, Daylight, Shade, Cloudy, Incandescent, Fluorescent (Warm white/Cool white/Day white/Daylight), Flash, C. Temp 2500 to 9900K, C Filter G7 to M7 (15-step), Custom, AWB micro adjustment Auto, Daylight, Shade, Fluorescent light (Daylight), Fluorescent light (Warm White), Fluorescent light (Cool White), Incandescent light, Underwater, Custom, Color Temperature
Shutter Speed Range: 1/8000 - 30 sec 1/32000 - 30 sec
Bulb Mode: Yes Yes
Exposure Compensation: +/- 5.0EV in 0.3EV steps +/- 5.0EV in 0.3EV steps
Metering Modes: 1200-zone Evaluative, Center-weighted, Spot TTL 256-zones metering; Multi, Spot, Average, Center-weighted
Program Auto Exposure: Yes Yes
Aperture Priority: Yes Yes
Shutter Priority: Yes Yes
Full Manual Exposure: Yes Yes
Creative Exposure Modes: Scene Modes: Portrait, Landscape, Macro, Sports Action, Sunset, Night Portrait, Night Scene, Hand-held Twilight, Auto HDR, Sweep Panorama (2D/3D) Film Simulation modes (PROVIA/Standard, Velvia/Vivid, ASTIA/Soft, Classic Chrome, PRO Neg.Hi, PRO Neg.Std, Black&White, Black&White+Ye Filter, Black&White+R Filter, Black&White+GFilter, Sepia, ACROS, ACROS+Ye Filter, ACROS+R Filter, ACROS+G Filter); Dynamic range setting: AUTO (100-400%), 100%, 200%, 400%; Panorama; Advanced Filters (Toy camera, Miniature, Pop color, High-key, Low-key, Dynamic tone, Soft focus, Partial color [Red / Orange / Yellow / Green / Blue / Purple])
Self Timer: 2, 10; 3 or 5 frames after 10 seconds 2 or 10 seconds
Time Lapse (intervalometer):   Yes
High Resolution Composite: No No
Flash
Built-in Flash: Yes Yes
Flash Modes: Auto, Off, Fill-flash, Rear sync, Wireless, High-Speed sync (with external flash), Slow sync, Red-eye reduction: On/Off TTL (Flash Auto / Standard / Slow Sync.), Manual, Commander, Off; Sync: 1st Curtain, 2nd Curtain; Red-eye Reduction pre-flash & Red-eye removal, Red-eye Reduction pre-flash Only, Red-eye removal Only, Off
Flash Guide Number (ISO 100): 12.0 m / 39.4 ft. 5.0 m / 16.4 ft.
Flash Range Description: GN=12(m) at ISO 100; Range is lens aperture dependent GN=5m (ISO 100) or 7m (ISO 200)
Max Flash Sync: 1/250 1/180
Flash Exposure Compensation: +/- 2.0 EV in 0.3EV steps +/- 2.0 EV in 0.3EV steps
External Flash Connection: Proprietary Hot Shoe, PC Sync Terminal Hot Shoe
Built-In Wireless Flash Control: Full TTL exposure Trigger Only
Image Storage
Usable Memory Types: MS Duo / MS PRO Duo / SD / SDHC / SDXC SD / SDHC / SDXC
UHS Support: UHS-I UHS-I
Other Memory:    
Dual Card Slots: No No
RAW Capture Support: Yes Yes
Uncompressed Format: 12-bit RAW (ARW 2.3), RAW+JPEG .RAF 14-bit RAW (lossless compressed or uncompressed); RAW + JPEG
Movie File Format: AVCHD 2.0 / MP4; Audio :Dolby Digital (AC-3) / MPEG-4 AAC-LC, stereo MOV (MPEG-4 AVC / H.264, Audio: Linear PCM 48KHz stereo sound)
Included Memory: No memory included No memory included
Included Memory Type:    
Connectivity
Built-In Wi-Fi: No Yes
NFC: No No
Bluetooth: No No
Built-In GPS: Yes No
Microphone Jack: Yes Yes
Headphone Jack: No No
External Connections: USB 2.0 High Speed USB 2.0 High Speed,WiFi
PictBridge Compliant: Yes No
DPOF Compliant: Yes No
Remote Control: Yes Yes
Remote Control Type: Optional Wireless or Wired Threaded cable release, optional wired, Wi-Fi
Connections (extended): Type-C HDMI Mini Connector (BRAVIA Sync, PhotoTV HD); Wired Remote Terminal, External Stereo Micophone Jack, DC Input Micro HDMI (Type D), Micro-B USB 2.0, 2.5mm stereo mic/remote jack
Performance Timing
Cycle time for JPEG shooting in single shot mode (seconds per frame, max resolution): 0.42 <0.3
Cycle time for RAW shooting in single shot mode (seconds per frame): 0.42  
Buffer size for RAW shooting in single shot mode (frames): 5  
Cycle time for RAW+JPEG shooting in single shot mode (seconds per shot): 0.42 0.64
Camera penalizes early shutter press? No Yes
JPEG shooting speed in burst mode (fps, max resolution): 11.6 13.7
Buffer size for JPEG shooting in burst mode (frames, max resolution): 17 32
RAW shooting speed in burst mode (fps): 11.6 13.7
Buffer size for RAW shooting in burst mode (frames): 14 25
RAW+JPEG shooting speed in burst mode (fps): 11.6 13.7
Buffer Size for RAW+JPEG shooting in burst mode (frames): 13 21
Shutter lag (full AF, wide/mid): 0.12 seconds 0.07 seconds
Shutter lag (full AF, tele):    
Shutter lag (full AF, live view - DSLR):    
Shutter lag (prefocused, live view - DSLR):    
Shutter Lag (manual focus): 0.085 seconds 0.057 seconds
Shutter lag (full AF, with flash): 0.33 seconds 0.16 seconds
Shutter Lag (prefocused): 0.054 seconds 0.047 seconds
Shutter Lag (notes): Full AF, Wide-area mode = 0.119s High Performance mode enabled.
Startup Time: 0.8 seconds 1.4 seconds
Play -> Record Time: 1.0 seconds 1.0 seconds
Flash cycle time, full power: 3.2 seconds 3.8 seconds
Power
Battery Life, Stills (CIPA Rating Monitor/Live View): 530 shots 350 shots
Battery Life, Still (CIPA Rating OVF/EVF): 470 shots 350 shots
Battery Life, Video:   50 minutes
Battery Form Factor: Proprietary NP-FM500H Proprietary NP-W126S
Usable Battery Types: Lithium-ion rechargeable Lithium-ion rechargeable
Batteries Included: 1 x Proprietary NP-FM500H Lithium-ion rechargeable 1 x Proprietary NP-W126S Lithium-ion rechargeable
Battery Charger Included (dedicated charger or AC/USB adapter): Yes Yes
Dedicated Battery Charger Included: Yes Yes
Internal Charging Supported: No Yes
Software
Included Software: Software CD-ROM (includes Picture Motion Browser, Image Data Converter 4)  
OS Compatibility: Windows XP SP3/Vista SP2/7, Mac OS X (v.10.5 +); PMB is Windows only  
Miscellaneous
Notes & Features: SteadyShot INSIDE Image Stabilization, Articulating LCD, 1080p HD Video, Auto+, Multi-frame NR, Hand-held Twilight, Auto HDR, Picture Effect, D-Range Optimizer, 2D/3D Sweep Panorama, Smile Shutter, DOF Preview, 12fps Burst Mode, Built-in GPS. Available in black or silver.