What is the sensor size of the Pentax 645D?
The Pentax 645D is a digital camera that has a medium format sensor at its core. This imager measures 44.0mm in width and 33.0mm in height, so that the total imaging area of the sensor amounts to 1 452 mm2.
The 645D provides an image resolution of 39.5 megapixels, based on 7 264 horizontal pixels and 5 440 vertical pixels.
Sensor size comparison with a film slide
The sensor diagonal measures 55mm, which gives rise to a format factor (or crop factor) of 0.79. Thus, the Pentax 645D is a medium-format camera, as its sensor is larger than a traditional 35mm film slide or negative.
Sensor specs and performance
The table below compares the sensor specs of the Pentax 645D 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.
| Camera Model |
Sensor Class |
Resolution (MP) |
Horiz. Pixels |
Vert. Pixels |
Video Format |
DXO Portrait |
DXO Landscape |
DXO Sports |
DXO Overall |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Pentax 645D | Medium Format | 39.5 | 7264 | 5440 | none | 24.6 | 12.6 | 1262 | 82 | |
| 2. | Canon 1D X Mark II | Full Frame | 20.0 | 5472 | 3648 | 4K/60p | 24.1 | 13.5 | 3207 | 88 | |
| 3. | Canon 1D X | Full Frame | 17.9 | 5184 | 3456 | 1080/30p | 23.8 | 11.8 | 2786 | 82 | |
| 4. | Canon 1D Mark IV | APS-H | 16.0 | 4896 | 3264 | 1080/30p | 22.8 | 12.0 | 1320 | 74 | |
| 5. | Leica S Typ 006 | Medium Format | 37.5 | 7500 | 5000 | none | 23.9 | 12.2 | 824 | 76 | |
| 6. | Nikon D850 | Full Frame | 45.4 | 8256 | 5504 | 4K/30p | 26.4 | 14.8 | 2660 | 100 | |
| 7. | Nikon D5 | Full Frame | 20.7 | 5588 | 3712 | 4K/30p | 25.1 | 12.3 | 2343 | 88 | |
| 8. | Nikon D810 | Full Frame | 36.2 | 7360 | 4912 | 1080/60p | 25.7 | 14.8 | 2853 | 97 | |
| 9. | Nikon D3S | Full Frame | 12.1 | 4256 | 2832 | 720/24p | 23.5 | 12.0 | 3253 | 82 | |
| 10. | Pentax 645Z | Medium Format | 51.1 | 8256 | 6192 | 1080/60i | 26.0 | 14.7 | 4505 | 101 | |
| 11. | Sony A7R | Full Frame | 36.2 | 7360 | 4912 | 1080/60p | 25.6 | 14.1 | 2746 | 95 |
In the United States, the 645D was initially launched in March 2010 at a price of $9,995.
Check 645D offers at
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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. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.
- Canon M6 Mark II vs Pentax 645D
- Fujifilm X-A5 vs Pentax 645D
- Leica V-LUX 3 vs Nikon Z6
- Nikon D3200 vs Pentax 645D
- Nikon D40X vs Nikon Z6
- Nikon D5300 vs Nikon Z6
- Nikon Z6 vs Olympus TG-4
- Nikon Z6 vs Sony RX100 III
- Nikon Z6 vs Sony RX100 VI
- Pentax 645D vs Pentax K-3 II
- Pentax 645D vs Pentax K-70
- Pentax 645D vs Sony A7R
| Camera Model | Pentax 645D | |
| Camera Type | Digital single lens reflex | |
| Camera Lens | Pentax 645 mount lenses | |
| Launch Date | March 2010 | |
| Launch Price | USD 9 995 | |
| Sensor Specs | ||
|---|---|---|
| Sensor Technology | CCD | |
| Sensor Format | Medium Format Sensor | |
| Sensor Size | 44.0 x 33.0 mm | |
| Sensor Area | 1 452 mm2 | |
| Sensor Diagonal | 55 mm | |
| Crop Factor | 0.79x | |
| Sensor Resolution | 39.5 Megapixels | |
| Image Resolution | 7 264 x 5 440 pixels | |
| Pixel Pitch | 6.06 μm | |
| Pixel Density | 2.72 MP/cm2 | |
| Moiré control | no AA filter | |
| Movie Capability | no Video | |
| ISO Setting | 100 - 1 600 ISO | |
| Image Processor | PRIME II | |
| DXO Sensor Quality (score) | 82 | |
| DXO Color Depth (bits) | 24.6 | |
| DXO Dynamic Range (EV) | 12.6 | |
| DXO Low Light (ISO) | 1262 | |
| Screen Specs | ||
| Viewfinder Type | Optical viewfinder | |
| Viewfinder Field of View | 98% | |
| Viewfinder Magnification | 0.78x | |
| Top-Level Screen | Control Panel | |
| LCD Size | 3.0 inch | |
| LCD Resolution | 921k dots | |
| LCD Attachment | Fixed screen | |
| Touch Input | No touchscreen | |
| Shooting Specs | ||
| Focus System | Phase-detect AF | |
| Manual Focusing Aid | no Peaking Feature | |
| Maximum Shutter Speed | 1/4000s | |
| Continuous Shooting | 1.1 shutter flaps/s | |
| Shutter Life Expectancy | 50 000 actuations | |
| Silent Shooting | no E-Shutter | |
| Time Lapse Photography | Intervalometer Built-in | |
| Fill Flash | no On-Board Flash | |
| Storage Medium | SDXC cards | |
| Single or Dual Card Slots | Dual card slots | |
| UHS card support | no | |
| Connectivity Specs | ||
| External Flash | Hotshoe | |
| Studio Flash | PC Sync socket | |
| USB Connector | USB 2.0 | |
| HDMI Port | no HDMI | |
| Wifi Support | no Wifi | |
| Body Specs | ||
| Environmental Sealing | Weathersealed body | |
| Battery Type | D-LI90 power pack | |
| Battery Life (CIPA) | 800 shots per charge | |
| Body Dimensions |
156 x 117 x 119 mm (6.1 x 4.6 x 4.7 in) |
|
| Camera Weight | 1 480 g (52.2 oz) | |
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