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What is the sensor size of the Pentax K-3 III?

The Pentax K-3 III is a digital camera that has an APS-C sensor at its core. This imager measures 23.3mm in width and 15.5mm in height, so that the total imaging area of the sensor amounts to 361 mm2.

The K-3 III provides an image resolution of 25.6 megapixels, based on 6 192 horizontal pixels and 4 128 vertical pixels.

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Sensor size comparison with a film slide

The sensor diagonal measures 28mm, which gives rise to a format factor (or crop factor) of 1.5. Hence, the Pentax K-3 III is a crop-sensor camera, as its sensor is smaller than a traditional 35mm film slide or negative.

Pentax K-3 III and Credit Card sensor measures
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Sensor specs and performance

The table below compares the sensor specs of the Pentax K-3 III to those of several similar cameras. The reported DXO values are indicators of the sensor's imaging quality (higher is better), covering 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.

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Sensor Characteristics
#   Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Pentax K-3 III APS-C 25.6 6192 41284K/30p24.213.7208385
2.
 
Fujifilm X-T4 APS-C 26.0 6240 41604K/60p24.113.6199584
3.
 
Fujifilm X-H1 APS-C 24.0 6000 40004K/30p24.013.3180682
4.
 
Nikon Z6 II Full Frame 24.3 6048 40244K/60p25.014.4330394
5.
 
Panasonic S5 Full Frame 24.0 6000 40004K/60p25.114.5269794
6.
 
Pentax KP APS-C 24.1 6016 40001080/60i23.913.2169981
7.
 
Pentax K-70 APS-C 24.0 6000 40001080/60i23.813.1163980
8.
 
Pentax K-S2 APS-C 20.0 5472 36481080/30p23.612.9151479
9.
 
Pentax K-3 II APS-C 24.1 6016 40001080/60i23.613.6110680
10.
 
Pentax K-3 APS-C 24.1 6016 40001080/60i23.713.4121680
11.
 
Pentax K-5 II APS-C 16.1 4928 32641080/25p23.814.1123582
Note: DXO values in italics represent estimates based on sensor size and age.
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Further information on the sensor in the Pentax K-3 III and the camera's operation can be found in the camera manual.

In the United States, the K-3 III was initially launched in March 2021 at a price of $1,999.

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Camera to camera comparisons

In case you are interested in seeing how this camera compares to another one, just use the search menu below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.

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    Specifications Summary
    Camera Model Pentax K-3 III
    Camera Type Digital single lens reflex
    Camera Lens Pentax K mount lenses
    Launch Date March 2021
    Launch Price USD 1 999
    Sensor Specs
    Sensor Technology CMOS
    Sensor Format APS-C Sensor
    Sensor Size 23.3 x 15.5 mm
    Sensor Area 361 mm2
    Sensor Diagonal 28 mm
    Crop Factor 1.5x
    Sensor Resolution 25.6 Megapixels
    Image Resolution 6 192 x 4 128 pixels
    Pixel Pitch 3.76 μm
    Pixel Density 7.08 MP/cm2
    Moiré control no AA filter
    Movie Capability 4K/30p Video
    ISO Setting 100 - 160 000 ISO
    Image Processor PRIME V
    Screen Specs
    Viewfinder Type Optical viewfinder
    Viewfinder Field of View 100%
    Viewfinder Magnification 0.70x
    Top-Level Screen Control Panel
    LCD Framing Live View
    LCD Size 3.2 inch
    LCD Resolution 1620k dots
    LCD Attachment Fixed screen
    Touch Input Touchscreen
    Shooting Specs
    Focus System Phase-detect AF
    Manual Focusing AidFocus Peaking
    Maximum Shutter Speed 1/8000s
    Continuous Shooting 12 shutter flaps/s
    Shutter Life Expectancy200 000 actuations
    Silent Shootingno E-Shutter
    Time Lapse PhotographyIntervalometer Built-in
    Image StabilizationIn-body stabilization
    Fill Flash no On-Board Flash
    Storage Medium 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 3.2
    HDMI Port micro HDMI
    Microphone Port External MIC port
    Headphone Socket Headphone port
    Wifi Support Wifi built-in
    Bluetooth Support Bluetooth built-in
    Geotagging GPS built-in
    Body Specs
    Environmental SealingWeathersealed body
    Battery Type Pentax D-LI90 power pack
    Battery Life (CIPA)800 shots per charge
    Body Dimensions 135 x 104 x 74 mm
    (5.3 x 4.1 x 2.9 in)
    Camera Weight 820 g (28.9 oz)

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