CameraLore
Archive illustration for Sony Alpha a7R III

Quick facts

Full name: Sony Alpha a7R III

Original position: Camera; original market position is not yet verifiedProduction status: Production status not verified
Regional aliases
No verified regional aliases
Similar models to distinguish
EOS 6D Mark IIM10 (Typ 3656)D850Alpha a9
Editorial guidance, not a verified specificationWhy it is still searched

People still search for Sony Alpha a7R III to verify its exact model, specifications, and place among comparable cameras.

Core specifications

Release year
2017 · Released about 9 years ago
Sensor
35.9 × 24 mm CMOS
Effective resolution
42.4 MP
Lens
—
Zoom
—
Weight
657 g
Battery
NP-FZ100 lithium-ion battery Li-ion battery
Storage
SD/SDHC/SDXC/MS PRO Duo
View full specifications
Editorial guidance, not a verified specification

Who it may suit

May suit photographers who need both stills and video, after checking autofocus, recording limits, and lens availability.

What to check before buying used

The checks below are editorial guidance. Verify the individual camera and seller information before buying.

  • Inspect the body, screen, doors, seals, and tripod socket for impact or moisture damage.
  • Test every button, dial, flash, screen, and viewfinder.
  • Photograph a plain bright surface to check for sensor dust, dead pixels, or damage.
  • Confirm the battery holds charge and that a compatible charger is included or available.
  • Test a supported memory card and inspect the card slot for bent pins or read errors.
  • Test video recording, microphones, stabilization, and the ports you expect to use.

Sensor metrics

Diagonal
43.18 mm

Sensor diagonal

√(35.9² + 24²) = 43.18 mm

Calculated from sensor width and height using the Pythagorean theorem.

Surface area
862 mm²

Sensor surface area

35.9 × 24 ≈ 862 mm²

A larger area usually offers more space to collect light, though image quality also depends on sensor generation.

Pixel pitch
4.51 µm

Pixel pitch

35.9 ÷ 7,964 × 1000 = 4.51 µm

Pixel pitch is the distance between the centers of adjacent pixels. This result assumes square pixels.

Pixel area
20.32 µm²

Pixel area

4.51² = 20.32 µm²

Theoretical pixel area is the square of pixel pitch and does not subtract physical gaps between pixels.

Pixel density
4.92 MP/cm²

Pixel density

42.4 MP ÷ 862 mm² ≈ 4.92 MP/cm²

Higher density means more pixels per unit area. It does not represent image quality on its own.

Actual sensor size

Rectangles use their physical proportions. Calibrate your display to approximate real-world size.

Calibrate screen size

Enter your display diagonal so sensor rectangles are shown closer to their physical size.

35.9 × 24 mm

Full specifications

Imaging

Effective pixels
42.4 MP
Total pixels
43.6 MP
Sensor
35.9 × 24 mm CMOS
Calculated resolution
7,964 × 5,324
Maximum image
7,952 × 5,304
Crop factor
1

Exposure & viewing

ISO
50–102,400
Viewfinder
Electronic viewfinder
Display
3 in / 1,440,000 dots
Lens mount
—

Video & storage

Maximum video
3,840 × 2,160
Storage media
SD/SDHC/SDXC/MS PRO Duo
Battery
NP-FZ100 lithium-ion battery Li-ion battery

Body

Weight
657 g
Dimensions
126.9 × 95.6 × 73.7 mm
Release year
2017

DigicamDB

Aperture Priority
Yes
Battery
NP-FZ100 lithium-ion battery
Brand
Sony
Built In Flash
—
Crop Factor
1
Depth Of Field
simulate →
Digital Zoom
Yes
Dimensions
126.9 x 95.6 x 73.7 mm
Effective Megapixels
42.40
Exposure Compensation
±5 EV (in 1/3 EV, 1/2 EV, 1 EV steps)
External Flash
✓
Focal Length 35mm Equiv
—
Gps
—
Hdmi
✓
Iso
Auto, 100-32000 (expandable to 50-102400)
Macro Focus Range
—
Manual Focus
✓
Max Aperture
—
Max Aperture 35mm Equiv
n/a
Max Image Resolution
7952 x 5304
Max Shutter Speed
1/8000 sec
Max Video Resolution
3840x2160 (30p/25p/24p)
Metering
Multi, Center-weighted, Spot
Min Shutter Speed
30 sec
Model
Alpha a7R III
Normal Focus Range
—
Optical Zoom
—
Raw Support
✓
Screen Resolution
1,440,000 dots
Screen Size
3"
Sensor Resolution
7976 x 5317
Sensor Size
35.9 x 24 mm
Sensor Type
CMOS
Shutter Priority
Yes
Storage Types
SD/SDHC/SDXC/MS PRO Duo
Total Megapixels
43.60
Usb
USB 3.0 (5 GBit/sec)
Video Capture
✓
Viewfinder
Electronic
Weight
657 g
White Balance Presets
10
Wireless
✓
Year
2017

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