How many Megapixels does the Sony A7R III have?
The Sony Alpha A7R III is equipped with a a full frame sensor that offers an image resolution of 42.2 megapixels (MP), or 42.2 million pixels. With its native aspect ratio of 3:2, the sensor has 7 952 horizontal pixels and 5 304 vertical pixels.
A 35mm film slide or negative contains 5-15 MP of useful detail, so that the Sony A7R III can be considered to be a high-resolution camera that outresolves any 35mm film camera.
A high megapixel count makes it possible to crop any captured image substantially or to make very large prints from the image file. On the downside, large megapixel files are slower to transfer and take up more storage space on the computer harddisk. Also, high-resolution imaging requires sharper, more expensive lenses than low-res picture taking.
How large can I print with 42.2 MP?
The maximum print size of the Sony A7R III for good quality output (200 dots per inch) amounts to 39.8 x 26.5 inches or 101 x 67.4 cm, for very good quality (250 dpi) 31.8 x 21.2 inches or 80.8 x 53.9 cm, and for excellent quality (300 dpi) 26.5 x 17.7 inches or 67.3 x 44.9 cm. Few people actually print their images that large on a regular basis, but it is nice to have the option to make very large prints of exceptional shots. Also, as mentioned earlier, a key advantage of high-MP cameras is that it is possible to crop an image ex-post and thereby, for example, change the composition of the capture or zoom in on some detail.
Sensor specs and performance
The table below compares the sensor specs of the Sony A7R III to those of several similar cameras. In addition to sensor class and megapixel count, DXO values are reported as indicators of the sensor's imaging quality (higher is better). Three aspects are covered: color depth (DXO Portrait), dynamic range (DXO Landscape), and high-ISO noise (DXO Sports). Larger sensor cameras tend to outperform cameras of the same generation that are equipped with a smaller imager. On the other hand, larger sensors are more expensive and require bigger and heavier lenses than smaller light receptors.
Camera Model |
Sensor Class |
Resolution (MP) |
Horiz. Pixels |
Vert. Pixels |
Video Format |
DXO Portrait |
DXO Landscape |
DXO Sports |
DXO Overall |
||
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Sony A7R III | Full Frame | 42.2 | 7952 | 5304 | 4K/30p | 26.0 | 14.7 | 3523 | 100 | |
2. | Nikon Z7 | Full Frame | 45.4 | 8256 | 5504 | 4K/30p | 26.3 | 14.6 | 2668 | 99 | |
3. | Sony A1 | Full Frame | 49.8 | 8640 | 5760 | 8k/30p | 25.9 | 14.5 | 3163 | 98 | |
4. | Sony A7 III | Full Frame | 24.0 | 6000 | 4000 | 4K/30p | 25.0 | 14.7 | 3730 | 96 | |
5. | Sony A7R II | Full Frame | 42.2 | 7952 | 5304 | 4K/30p | 26.0 | 13.9 | 3434 | 98 | |
6. | Sony A7R IIIA | Full Frame | 42.2 | 7952 | 5304 | 4K/30p | 26.0 | 14.7 | 3523 | 100 | |
7. | Sony A7R IV | Full Frame | 60.2 | 9504 | 6336 | 4K/30p | 26.0 | 14.8 | 3344 | 99 | |
8. | Sony A7R IVA | Full Frame | 60.2 | 9504 | 6336 | 4K/30p | 26.0 | 14.8 | 3344 | 99 | |
9. | Sony A7R V | Full Frame | 60.2 | 9504 | 6336 | 8k/24p | 26.5 | 14.8 | 3187 | 100 | |
10. | Sony A7S III | Full Frame | 12.0 | 4240 | 2832 | 4K/120p | 23.7 | 13.9 | 2520 | 86 | |
11. | Sony A9 | Full Frame | 24.0 | 6000 | 4000 | 4K/30p | 24.9 | 13.3 | 3517 | 92 |
In the United States, the A7R III was initially launched in October 2017 at a price of $3,199.
Camera to camera comparisons
If you would like to see a side-by-side review with another camera, just make your choice using the following search menu. An an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.
- Canon G9 X Mark II vs Sony A7R III
- Canon R10 vs Nikon Z6
- Fujifilm X-A7 vs Nikon Z6
- Fujifilm X-M1 vs Sony A7R III
- Nikon A1000 vs Sony A7R III
- Nikon Z6 vs Olympus E-410
- Nikon Z6 vs Olympus E-620
- Nikon Z6 vs Panasonic FZ2000
- Nikon Z6 vs Ricoh WG-6
- Pentax K-1 vs Sony A7R III
- Sony A7R III vs Sony A7R IV
- Sony A7R III vs Sony A7S II
Camera Model | Sony A7R III | |
---|---|---|
Camera Type | Mirrorless system camera | |
Camera Lens | Sony E mount lenses | |
Launch Date | October 2017 | |
Launch Price | USD 3 199 | |
Sensor Specs | ||
Sensor Technology | BSI-CMOS | |
Sensor Format | Full Frame Sensor | |
Sensor Size | 35.9 x 24.0 mm | |
Sensor Area | 862 mm2 | |
Sensor Diagonal | 43.2 mm | |
Crop Factor | 1.0x | |
Sensor Resolution | 42.2 Megapixels | |
Image Resolution | 7 952 x 5 304 pixels | |
Pixel Pitch | 4.52 μm | |
Pixel Density | 4.90 MP/cm2 | |
Moiré control | no AA filter | |
Movie Capability | 4K/30p Video | |
ISO Setting | 100 - 32 000 ISO | |
ISO Boost | 50 - 102 400 ISO | |
Image Processor | BIONZ X | |
DXO Sensor Quality (score) | 100 | |
DXO Color Depth (bits) | 26.0 | |
DXO Dynamic Range (EV) | 14.7 | |
DXO Low Light (ISO) | 3523 | |
Screen Specs | ||
Viewfinder Type | Electronic viewfinder | |
Viewfinder Field of View | 100% | |
Viewfinder Magnification | 0.78x | |
Viewfinder Resolution | 3686k dots | |
Top-Level Screen | no Top Display | |
LCD Framing | Live View | |
LCD Size | 3.0 inch | |
LCD Resolution | 1440k dots | |
LCD Attachment | Tilting screen | |
V-logging Friendliness | No front-flip | |
Touch Input | Touchscreen | |
Shooting Specs | ||
Focus System | On-Sensor Phase-detect | |
Manual Focusing Aid | Focus Peaking | |
Maximum Shutter Speed | 1/8000s | |
Continuous Shooting | 10 shutter flaps/s | |
Shutter Life Expectancy | 500 000 actuations | |
Silent Shooting | Electronic Shutter | |
Time Lapse Photography | Intervalometer Built-in | |
Image Stabilization | In-body stabilization | |
Fill Flash | no On-Board Flash | |
Storage Medium | MS or SDXC cards | |
Single or Dual Card Slots | Dual card slots | |
UHS card support | Single UHS-II | |
Connectivity Specs | ||
External Flash | Hotshoe | |
Studio Flash | PC Sync socket | |
USB Connector | USB 3.1 | |
HDMI Port | micro HDMI | |
Microphone Port | External MIC port | |
Headphone Socket | Headphone port | |
Wifi Support | Wifi built-in | |
Near-Field Communication | NFC built-in | |
Bluetooth Support | Bluetooth built-in | |
Body Specs | ||
Environmental Sealing | Weathersealed body | |
Battery Type | Sony NP-FZ100 power pack | |
Battery Life (CIPA) | 650 shots per charge | |
In-Camera Charging | USB charging | |
Body Dimensions |
127 x 96 x 74 mm (5.0 x 3.8 x 2.9 in) |
|
Camera Weight | 650 g (22.9 oz) |
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