Sony A7 IV
Specs
Sensor info
Sony A7 IV comes with a
35.9 x 23.9 mm CMOS sensor, which has a diagonal of
43.13 mm (1.7") and a surface area of
858.01 mm².
If you want to know about the accuracy of these numbers,
click here.
Actual sensor size
Note: Actual size is set to screen → change »
This is the actual size of the A7 IV sensor: 35.9 x 23.9 mm
The sensor has a surface area of 858 mm².
There are approx. 33,000,000 photosites (pixels) on this area.
Pixel pitch, which is a measure of the distance between pixels, is 5.1 µm.
Pixel pitch tells you the distance from the center of one pixel (photosite) to the center of the next.
Pixel or photosite area is 26.01 µm². The larger the photosite, the more light it can capture and the more information can be recorded.
Pixel density tells you how many million pixels fit or would fit in one square cm of the sensor. Sony A7 IV has a pixel density of 3.84 MP/cm².
These numbers are important in terms of assessing the overall quality of a digital camera. Generally, the bigger (and newer) the sensor, pixel pitch and photosite area, and the smaller the pixel density, the better the camera. If you want to see how A7 IV compares to other cameras, click here.
Pixel or photosite area is 26.01 µm². The larger the photosite, the more light it can capture and the more information can be recorded.
Pixel density tells you how many million pixels fit or would fit in one square cm of the sensor. Sony A7 IV has a pixel density of 3.84 MP/cm².
These numbers are important in terms of assessing the overall quality of a digital camera. Generally, the bigger (and newer) the sensor, pixel pitch and photosite area, and the smaller the pixel density, the better the camera. If you want to see how A7 IV compares to other cameras, click here.
Specifications
| Brand: | Sony |
| Model: | A7 IV |
| Effective megapixels: | 33.00 |
| Total megapixels: | 34.10 |
| Sensor size: | 35.9 x 23.9 mm |
| Sensor type: | CMOS |
| Sensor resolution: | 7035 x 4690 |
| Max. image resolution: | 7008 x 4672 |
| Crop factor: | 1 |
| Optical zoom: | |
| Digital zoom: | Yes |
| ISO: | Auto, 100-51200 (expandable to 50-204800) |
| RAW support: | |
| Manual focus: | |
| Normal focus range: | |
| Macro focus range: | |
| Focal length (35mm equiv.): | |
| Aperture priority: | Yes |
| Max aperture: | |
| Max. aperture (35mm equiv.): | n/a |
| Metering: | Multi, Center-weighted, Highlight-weighted, Spot, Average |
| Exposure Compensation: | ±5 EV (in 1/3 EV, 1/2 EV steps) |
| Shutter priority: | Yes |
| Min. shutter speed: | 30 sec |
| Max. shutter speed: | 1/8000 sec |
| Built-in flash: | |
| External flash: | |
| Viewfinder: | Electronic |
| White balance presets: | 7 |
| Screen size: | 3" |
| Screen resolution: | 1,036,800 dots |
| Video capture: | |
| Max. video resolution: | 3840x2160 (60p/50p/30p/25p/24p) |
| Storage types: | SD/SDHC/SDXC, CFexpress A |
| USB: | USB 3.0 (5 GBit/sec) |
| HDMI: | |
| Wireless: | |
| GPS: | |
| Battery: | NP-FZ100 lithium-ion battery |
| Weight: | 658 g |
| Dimensions: | 131.3 x 96.4 x 79.8 mm |
| Year: | 2021 |
Compare A7 IV with another camera
Popular comparisons:
- Sony A7 IV vs. Sony a7R IV
- Sony A7 IV vs. Nikon Z7 II
- Sony A7 IV vs. Sony a1
- Sony A7 IV vs. Nikon Z6 II
- Sony A7 IV vs. Sony Alpha A7 III
- Sony A7 IV vs. Canon EOS R5
- Sony A7 IV vs. Sony a7S III
- Sony A7 IV vs. Nikon D750
- Sony A7 IV vs. Sony a7R V
- Sony A7 IV vs. Sony Alpha a6400
- Sony A7 IV vs. Sony Alpha a9 II
Diagonal
Diagonal is calculated by the use of Pythagorean theorem:
where w = sensor width and h = sensor height
| Diagonal = √ | w² + h² |
Sony A7 IV diagonal:
w = 35.90 mm
h = 23.90 mm
h = 23.90 mm
| Diagonal = √ | 35.90² + 23.90² | = 43.13 mm |
Surface area
Surface area is calculated by multiplying the width and the height of a sensor.
Width = 35.90 mm
Height = 23.90 mm
Surface area = 35.90 × 23.90 = 858.01 mm²
Width = 35.90 mm
Height = 23.90 mm
Surface area = 35.90 × 23.90 = 858.01 mm²
Pixel pitch
Pixel pitch is the distance from the center of one pixel to the center of the
next measured in micrometers (µm). It can be calculated with the following formula:
| Pixel pitch = | sensor width in mm | × 1000 |
| sensor resolution width in pixels |
Sony A7 IV pixel pitch:
Sensor width = 35.90 mm
Sensor resolution width = 7035 pixels
Sensor resolution width = 7035 pixels
| Pixel pitch = | 35.90 | × 1000 | = 5.1 µm |
| 7035 |
Pixel area
The area of one pixel can be calculated by simply squaring the pixel pitch:
You could also divide sensor surface area with effective megapixels:
Pixel area = pixel pitch²
You could also divide sensor surface area with effective megapixels:
| Pixel area = | sensor surface area in mm² |
| effective megapixels |
Sony A7 IV pixel area:
Pixel pitch = 5.1 µm
Pixel area = 5.1² = 26.01 µm²
Pixel area = 5.1² = 26.01 µm²
Pixel density
Pixel density can be calculated with the following formula:
You could also use this formula:
| Pixel density = ( | sensor resolution width in pixels | )² / 1000000 |
| sensor width in cm |
You could also use this formula:
| Pixel density = | effective megapixels × 1000000 | / 10000 |
| sensor surface area in mm² |
Sony A7 IV pixel density:
Sensor resolution width = 7035 pixels
Sensor width = 3.59 cm
Pixel density = (7035 / 3.59)² / 1000000 = 3.84 MP/cm²
Sensor width = 3.59 cm
Pixel density = (7035 / 3.59)² / 1000000 = 3.84 MP/cm²
Sensor resolution
Sensor resolution is calculated from sensor size and effective megapixels. It's slightly higher
than maximum (not interpolated) image resolution which is usually stated on camera specifications.
Sensor resolution is used in pixel pitch, pixel area, and pixel density formula.
For sake of simplicity, we're going to calculate it in 3 stages.
1. First we need to find the ratio between horizontal and vertical length by dividing the former with the latter (aspect ratio). It's usually 1.33 (4:3) or 1.5 (3:2), but not always.
2. With the ratio (r) known we can calculate the X from the formula below, where X is a vertical number of pixels:
3. To get sensor resolution we then multiply X with the corresponding ratio:
Resolution horizontal: X × r
Resolution vertical: X
1. First we need to find the ratio between horizontal and vertical length by dividing the former with the latter (aspect ratio). It's usually 1.33 (4:3) or 1.5 (3:2), but not always.
2. With the ratio (r) known we can calculate the X from the formula below, where X is a vertical number of pixels:
| (X × r) × X = effective megapixels × 1000000 → |
|
Resolution horizontal: X × r
Resolution vertical: X
Sony A7 IV sensor resolution:
Sensor width = 35.90 mm
Sensor height = 23.90 mm
Effective megapixels = 33.00
Resolution horizontal: X × r = 4690 × 1.5 = 7035
Resolution vertical: X = 4690
Sensor resolution = 7035 x 4690
Sensor height = 23.90 mm
Effective megapixels = 33.00
| r = 35.90/23.90 = 1.5 |
|
Resolution vertical: X = 4690
Sensor resolution = 7035 x 4690
Crop factor
Crop factor or focal length multiplier is calculated by dividing the diagonal
of 35 mm film (43.27 mm) with the diagonal of the sensor.
| Crop factor = | 43.27 mm |
| sensor diagonal in mm |
Sony A7 IV crop factor:
Sensor diagonal = 43.13 mm
| Crop factor = | 43.27 | = 1 |
| 43.13 |
35 mm equivalent aperture
Equivalent aperture (in 135 film terms) is calculated by multiplying lens aperture
with crop factor (a.k.a. focal length multiplier).
Sony A7 IV equivalent aperture:
Aperture is a lens characteristic, so it's calculated only for
fixed lens cameras. If you want to know the equivalent aperture for
Sony A7 IV, take the aperture of the lens
you're using and multiply it with crop factor.
Since crop factor for Sony A7 IV is 1, the equivalent aperture is aperture.
Since crop factor for Sony A7 IV is 1, the equivalent aperture is aperture.
Enter your screen size (diagonal)
My screen size is
inches
Actual size is currently adjusted to screen.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a sensor won't be shown correctly.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a sensor won't be shown correctly.