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Since the release of the first α7 camera in 2013, Sony have pushed the boundaries not only for Full Frame Photography, but for Mirrorless Cameras as well.
Using full frame sensors, the DSLR-inspired designed models weigh notably less than Full Frame DSLR’s from other brands as well as APS-C DSLRs.
12 months after the release of the first generation of α7, Sony introduced the α7 II which further provided functions and settings required by even the most demanding of photographer.

 

Side By Side Comparison

Model α7 II α7 III α7R II α7S II α7R III α9
Sensor resolution 24.3 MP Exmor CMOS
6000x4000 Pixels
(35.8x23.90mm)
24.3 MP Exmor R BSR-CMOS
6000x4000 Pixels
(35.6x23.8mm)
42.4 MP Exmor R BSI-CMOS
7952x5304 Pixels
(35.8x23.9mm)
12.2 MP Exmor CMOS
4240x2832 Pixels
(35.8x23.9mm)
42.4 MP Exmor R BSI-CMOS
7952x5304 Pixels
(35.8x23.9mm)
24.2 MP Exmore RS CMOS
6000x4000 Pixels
(35.6x23.8mm)
ISO range Expanded ISO 50 - 25600
Multi Frame Noise Reduction 100-51200
Native ISO 100 - 51200
Expanded ISO 50 - 204800
Native ISO 100 - 25600
Expanded ISO 50-102400
Native ISO 100 - 25600
Expanded ISO 50-102400
Native ISO 100 - 25600
Expanded ISO 50-102400
Native ISO 100 - 51200
Expanded ISO 50 - 204800
Autofocus 25 point contrast-detection
with 117 points phase-detection
693 point phase-detection         425 Contrast 25 point contrast-detection
with 399 points phase-detection
169 point contrast-detection 425 point contrast-detection
with 399 points phase-detection
693 point phase-detection
Maximum flash sync speed 1/250 1/250 1/250 1/250 1/250 1/250
Max Continuous Shooting 5 frame/s 10 frame/s 5 frame/s 5 frame/s 10 frame/s 20 frame/s
In-body image stabilization 5-axis
Flash Exposure Lock Yes Yes Yes Yes Yes Yes
Electronic shutter mode First-curtain only First-curtain and Silent Shooting First-curtain and Silent Shutter First-curtain and Silent Shutter First-curtain and Silent Shutter First-curtain and Silent Shutter
Gapless on-chip lens No Yes Yes Yes Yes No
Live-view Tethered Capture Yes Yes Yes Yes Yes Yes
Custom minimum shutter speed at Auto ISO No Yes Yes Yes Yes Yes
Flexible Spot with Lock on AF No Yes Yes Yes Yes Yes
Continuous Eye-AF No Yes Yes Yes Yes Yes
AF Sensitivity -1 to 20 EV -3 to 20 EV -2 to 20 EV -4 to 20 EV -3 to 20 EV -3 to 20 EV
Metering Sensitivity -1 to 20 EV - 3 to 20 EV -3 to 20 EV -3 to 20 EV -3 to 20 EV -3 to 20 EV
User Custom Buttons 4 4 4 4 4 4
Monitor Resolution 1,228.8 K 1.444K 1,228.8k 1,228.8K 1,444K
Viewfinder Magnification 0.71x 0.78x 0.78×
Video record format MPEG-4, AVCHD (28 Mbit/s), XAVC S (50mbit/s) 1080p MPEG-4, AVCHD (28 Mbit/s), XAVC S (100mbit/s) 4K Video
Video sampling Line skipping Full Pixel Readout - No pixel binning Pixel-binning at Full Format
Full-pixel readout at Super 35
Full-pixel readout Full Pixel Readout Full Pixel Readout
Slow motion video record No Yes (1080p 120fps) Yes (720p, 120fps) Yes (1080p, 120fps) Yes (1080p, 120fps) Yes (1080p, 120fps)
HDMI Output 4K still and 1080pvideo 4K Still and 4K Video 8K still and 4K video 4K still and 4K video 4K still and 4K video 4K still and 4K video
Video Light mode No Yes Yes Yes Yes Yes
Professional Video Edit Picture Profile with CineGamma, Timecode, Userbit S-Log2, S-log3, HLG, HLG14,Cine1-4 N/A
Body material Full magnesium alloy chassis and stanless steel bayonet mount
Other features Hybrid autofocus system Dual Card Slot- 177 images buffer Touch operation AF Hybrid autofocus system,
No Optical Low-Pass filter
Full-pixel readout video at Full Format Dual Card Slot, Touch Operation AF, PC Socket, Pixel Shift Dual Card Slot, 362 Image Buffer, Touch operation AF,  Lan Conection
Phase-detection AF on non-native lenses Yes (Firmware update required) Only with LA-EA2 / LA-EA4 Yes Only with LA-EA2 / LA-EA4 Only with LA-EA2 / LA-EA4 Only with LA-EA2 / LA-EA4
Operate while USB charging No Yes Yes Yes Yes Yes
Battery NP-FW50 NP-FZ100 NP-FW50 NP-FW50 NP-FZ100 NP-FZ100
Battery-life
(CIPA Standards)
350 shots 710 shots (LCD Monitor)/ 610 shots (Viewfinder) 340 shots 370 shots 530 shots (Viewfinder) / 650 shots (LCD monitor) 480 shots (Viewfinder) / 650 shots (LCD monitor)
Weight 556 g 650 g 582 g 584 g 657g 673g