• APS-C 369.7mm2
  • 20.3 megapixels
  • ISO 100 - 12,800
  • 35mm 858.0mm2
  • 33.0 megapixels
  • ISO 100 - 51,200
  • Detailed specifications
  • Samsung NX20
  • Sony Alpha ILCE-A7 IV
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Manufacturer URL: Manufacturer website Manufacturer website
Predecessor:   Sony A7 III
A7 III vs A7 IV
Successor:    
General
Model Number: NX20 A7 IV
Alternate Model Number(s):   ILCE-7M4
Camera Format: Compact System Camera Compact System Camera
Currently Manufactured: No Yes
Retail Price: $1099.99 $2500.00
Street Price: $399.99 $2,231.33
Date Available: 2012-05-05 2021-12-31
Tripod Mount: Yes Yes
Weight: 22.5 oz (637 g)
includes batteries, kit lens
23.2 oz (658 g)
includes batteries
Size: 4.8 x 3.5 x 1.6 in.
(122 x 90 x 40 mm)
5.2 x 3.8 x 3.1 in.
(131 x 96 x 80 mm)
Waterproof: No No
Waterproof Depth: n/a n/a
Image Sensor
Sensor Type: CMOS CMOS
Sensor Manufacturer: Samsung Sony
Effective Megapixels: 20.3 33.0
Sensor Format: APS-C 35mm
Sensor size: 369.72mm2 (23.7mm x 15.6mm) 858.01mm2 (35.90mm x 23.90mm)
Approximate Pixel Pitch: 4.33 microns 5.12 microns
Focal Length Multiplier: 1.5x 1.0x
Aspect Ratio: 3:2 3:2
Color Filter Type: RGBG RGBG
Anti Aliasing Filter: Fixed None
Self-Cleaning: Yes Yes
Sensor shift image stabilization: No Yes
On-Sensor Phase Detect: No No
DxO Sensor Score: 75  
DxO Color Depth Score (bits): 23.4  
DxO Dynamic Range Score (evs): 12.9  
DxO Maximum Effective ISO Score (iso): 785  
Image Capture
Image Resolution: 5472 x 3648 (20.0 MP, 3:2),
5472 x 3080 (16.9 MP, 16:9),
3648 x 3648 (13.3 MP, 1:1),
3888 x 2592 (10.1 MP, 3:2),
3712 x 2088 (7.8 MP, 16:9),
2640 x 2640 (7.0 MP, 1:1),
2976 x 1984 (5.9 MP, 3:2),
2736 x 1824 (5.0 MP, 3:2),
2944 x 1656 (4.9 MP, 16:9),
2000 x 2000 (4.0 MP, 1:1),
1920 x 1080 (2.1 MP, 16:9),
1728 x 1152 (2.0 MP, 3:2),
1024 x 1024 (1.0 MP, 1:1)
7008 x 4672 (32.7 MP, 3:2),
4608 x 3072 (14.2 MP, 3:2),
3504 x 2336 (8.2 MP, 3:2),
7008 x 3944 (27.6 MP, 16:9),
4608 x 2592 (11.9 MP, 16:9),
3504 x 1968 (6.9 MP, 16:9),
6224 x 4672 (29.1 MP, 4:3),
4096 x 3072 (12.6 MP, 4:3),
3120 x 2336 (7.3 MP, Other),
4672 x 4672 (21.8 MP, 1:1),
3072 x 3072 (9.4 MP, 1:1),
2336 x 2336 (5.5 MP, 1:1)
Image File Format: JPEG (EXIF 2.21), .SRW 12-bit RAW JPEG (8-bit), HEIF (10-bit), RAW (14-bit ARW 2.3), RAW+JPEG, RAW+HEIF
Continuous-mode frames/second: 7.5 10.0
Video Capture
Can take movies: Yes Yes
Movie Resolution: 1920x1080 (30p)
1920x810 (24p)
1280x720 (30p)
640x480 (30p)
320x240 (30p)
3840x2160 (60p/​50p/​30p/​25p/​24p)
1920x1080 (120p/​60p/​50p/​30p/​25p/​24p)
Movie File Format: MP4 (H.264) with AAC audio XAVC S (Long GOP, H.264 MP4); XAVC HS (Long GOP, H.265 HEVC); XAVC S-I (All-Intra, H.264 MP4)
Composite Video Out: Yes No
NTSC/PAL Switchable Video: Yes n/a
Video Usable as Viewfinder: n/a
HD Video Out: Yes Yes
HD Video Connection: HDMI HDMI
Lens & Optics
Lens Mount: Samsung NX Sony E
Lens: Samsung 18-55mm f/3.5-5.6 OIS NX Sony FE 28-70mm f/3.5-5.6 OSS SEL2870
Focal Length (35mm equivalent): 27 - 84mm 28 - 70mm
Focal Length (actual): 18 - 55mm 28 - 70mm
Zoom Ratio: 3.06x 2.50x
Aperture Range: f/3.5 (wide) / f/5.6 (tele) - f/22 f/3.5-22 (W) / f/5.6-36 (T)
Integrated ND Filter: No No
Normal Focus Range: 28 cm to Infinity
11.0 in to Infinity
40 cm to Infinity
15.7 in to Infinity
Macro Focus Range:    
Filter Thread: 58.0mm 55.0mm
Thread Type: n/a n/a
Optical Image Stabilization: Yes No
Digital Zoom: Yes Yes
Digital Zoom Values: Up to 2x i-Zoom Up to 4x; 2x Clear Image Digital Zoom
Auto Focus
Auto Focus: Yes Yes
Auto Focus Type: 15-point Contrast Detection; has single-point and 35-point closeup modes; Face Detection : Max. 10 faces Fast Hybrid 4D AF: 759 points (PDAF), 425 points (contrast-detection AF); Wide (759 points (PDAF), 425 points (CDAF))/Zone/Center/Flexible Spot (S/M/L)/Expanded Flexible Spot/Tracking (Wide/Zone/Center/Flexible Spot (S/M/L)/Expanded Flexible Spot); Touch AF
Auto Focus Assist Light? Yes Yes
Manual Focus: Yes Yes
Viewfinder
Viewfinder: EVF / OLED EVF / LCD
Viewfinder Type: EVF type with Eye Contact Sensor; SVGA (800 x 600) TFT-LCD; Coverage: Approx. 100%; Magnification: Approx. 1.04X (APS-C, 50mm, -1m-1), Approx. 0.68X (Equivalent to a 50mm lens on a 35mm camera); Eyepoint: Approx. 18.0mm; Diopter Adjustment: -4.0 to +4.0m- EVF: 1.3 cm (0.5 type) 3.68M-dot UXGA color OLED, 100% coverage, 0.78x magnification, -4.0 to +3.0 diopter, 23mm eyepoint from the eyepiece lens
Focus Peaking: No Yes
EVF Resolution: 1,440,000 dots (480,000 pixels) 3,686,400 dots (1,228,800 pixels)
Viewfinder Magnification (35mm equivalent): 0.69x  
Viewfinder Magnification (nominal/claimed): 1.04x  
Display
Eye-level Viewfinder: Yes Yes
Rear Display: Yes Yes
Rear Display Size (inches): 3.0 3.0
Rear Display Resolution: 614,400 dots 3,680,000 dots
Touchscreen: No Yes
Articulating Screen: Yes Yes
Tilt Swivel Screen: Yes
Selfie Screen: Yes
Max Playback Zoom:   13.3x
Top Deck Display: No No
Exposure
Maximum ISO (native): 12800 51200
Minimum ISO (native): 100 100
ISO Settings: Auto (100-3200), 100, 200, 400, 800, 1600, 3200, 6400, 12800 (1 or 1/3 EV steps) Auto, 100 - 51200, expandable to 50 - 204800
Auto ISO Mode: Yes Yes
White Balance Settings: Auto, Daylight, Cloudy, White Fluorescent, Neutral Fluorescent, Daylight Fluorescent, Tungsten, Flash, Custom, Kelvin Color Temp., 7-step A/B + G/M adjust Auto, Daylight, Shade, Cloudy, Incandescent, Fluorescent (4 settings), Flash, Custom, Color Temp./ Filter (2500-9900K with 57-step Magenta/Green and 29-step Amber/Blue compensation), Underwater
Shutter Speed Range: 1/8000 - 30 sec 1/8000 - 30 sec
Bulb Mode: Yes Yes
Exposure Compensation: +/- 3.0EV in 0.3EV steps +/- 5.0EV in 0.3EV steps
Metering Modes: 221-segment Multi, Center-weighted, Spot 1200-zone Evaluative Multi-segment, Center-weighted, Spot (Standard/Large), Entire Screen Avg., Highlight
Program Auto Exposure: Yes Yes
Aperture Priority: Yes Yes
Shutter Priority: Yes Yes
Full Manual Exposure: Yes Yes
Creative Exposure Modes: Scene: Panorama (Live, 3D), Beauty shot, Night, Landscape, Portrait, Children, Sports, Close-Up, Text, Sunset, Dawn, Backlight, Fireworks, Beach & Snow, Sound Picture, 3D Photo; Smart Filter: Vignetting, Miniature, Fish-Eye, Sketch, De-fog, Halftone Dots, Soft Focus, Old Film1, Old Film2, Negative, Selective Color (4 Color Modes); Magic Frame: Old Album, Old Film, Wave, Full Moon, Old Record, Magazine, Sunny Day, Classic TV, Wall Art, Holiday, Billboard 1, Billboard 2, Newspaper 3 Custom Settings; Creative Look; Slow & Quick Motion; HDR: Auto Exposure Difference, Exposure difference Level (1-6 EV at 1.0 EV step)
Self Timer: 2-30 sec in 1 sec steps seconds 2, 5, 10; 3/5 shots after 2/5/10 seconds
Time Lapse (intervalometer):    
High Resolution Composite: No No
Flash
Built-in Flash: Yes No
Flash Modes: Smart Flash, Auto, Auto+Red-eye reduction, Fill-in, Fill-in+Red-eye reduction, 1st Curtain, 2nd Curtain, Off Auto, Fill Flash, Hi-Speed Sync, Off, Rear Sync, Red-Eye Reduction, Slow Sync
Flash Guide Number (ISO 100): 11.0 m / 36.1 ft. n/a
Flash Range Description: Depends on lens aperture n/a
Max Flash Sync: 1/180 1/250
Flash Exposure Compensation: +/- 2.0 EV in 0.5EV steps +/- 3.0 EV in 0.3EV steps
External Flash Connection: Hot shoe Enhanced Multi Interface Hot Shoe, Sync Terminal
Built-In Wireless Flash Control: No No
Image Storage
Usable Memory Types: SD / SDHC / SDXC MS PRO Duo / SD / SDHC / SDXC / CFexpress
UHS Support:   UHS-I
Other Memory:   2x:CFexpress Type A, SD UHS-II
Dual Card Slots: No Yes
RAW Capture Support: Yes Yes
Uncompressed Format: .SRW 12-bit RAW RAW (14-bit ARW 2.3), RAW+JPEG, RAW+HEIF
Movie File Format: MP4 (H.264) with AAC audio XAVC S (Long GOP, H.264 MP4); XAVC HS (Long GOP, H.265 HEVC); XAVC S-I (All-Intra, H.264 MP4)
Included Memory: No memory included No memory included
Included Memory Type:    
Connectivity
Built-In Wi-Fi: Yes Yes
NFC: Yes
Bluetooth: No Yes
Built-In GPS: No No
Microphone Jack: No Yes
Headphone Jack: No Yes
External Connections: USB 2.0 High Speed,WiFi USB 2.0 High Speed,USB 3.0 Super Speed,Bluetooth,WiFi
PictBridge Compliant: Yes No
DPOF Compliant: Yes Yes
Remote Control: Yes Yes
Remote Control Type: Optional wired (SR2NX02) Yes, via USB or Wi-Fi
Connections (extended): Micro (Type D) HDMI, Combined AV/USB/Remote Micro USB Port USB-C (USB 3.2 Gen2, 10Gbps), Multi-Terminal Micro USB (with remote support), Type-A HDMI, 3.5mm Microphone and Headphone jacks
Performance Timing
Cycle time for JPEG shooting in single shot mode (seconds per frame, max resolution): 1.40  
Cycle time for RAW shooting in single shot mode (seconds per frame): 1.32  
Buffer size for RAW shooting in single shot mode (frames): 4  
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): 7.5 10.0
Buffer size for JPEG shooting in burst mode (frames, max resolution): 11 828
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): 0.35 seconds  
Shutter lag (full AF, tele):    
Shutter lag (full AF, live view - DSLR):    
Shutter lag (prefocused, live view - DSLR):    
Shutter Lag (manual focus): 0.060 seconds  
Shutter lag (full AF, with flash): 0.62 seconds  
Shutter Lag (prefocused): 0.044 seconds  
Shutter Lag (notes): Full AF Shutter Lag, Wide Area mode = 0.650s  
Startup Time: 3.0 seconds  
Play -> Record Time: 0.9 seconds  
Flash cycle time, full power: 3.6 seconds  
Power
Battery Life, Stills (CIPA Rating Monitor/Live View): 360 shots  
Battery Life, Still (CIPA Rating OVF/EVF):    
Battery Life, Video:    
Battery Form Factor: Proprietary BP1310 Proprietary
Usable Battery Types: Lithium-ion rechargeable NP-FZ100 Lithium-ion rechargeable
Batteries Included: 1 x Proprietary BP1310 lithium-ion rechargeable 1 x Proprietary NP-FZ100 Lithium-ion rechargeable
Battery Charger Included (dedicated charger or AC/USB adapter): Yes Yes
Dedicated Battery Charger Included: Yes
Internal Charging Supported: Yes
Software
Included Software: intelli-studio 3.0, Samsung RAW Converter 4, PC Auto Backup, Adobe Reader Capture One Express (for Sony) free download
OS Compatibility: Windows, Mac OS (except intelli-studio) Windows, Mac OS X
Miscellaneous
Notes & Features: Built-in Wi-Fi (IEEE 802.11b/g/n support, Mobile Link, Remote Viewfinder, Social Sharing, Email, Cloud , Auto Backup, TV Link, Wi-Fi Direct), supports geotagging w/ optional WGS84 GPS Module.