5.75 in 3.21 in  | 6.14 in 4.61 in  | |
| Available colors | ||
| Editiorial reviews | ||
| User rating |
 Nikon D810 |  Pentax 645D | |
|---|---|---|
| Sensor type | CMOS | CCD |
| Image sensor format | Full frame | Medium format |
| Sensor size | 1.41 in | 1.73 in |
| Sensor photo detectors | 37.0 Mpx | 40.0 Mpx |
| Effective pixels | 36.0 Mpx | 40.0 Mpx |
| Image ratio w:h |
| 4:3 |
| Max resolution | 7360 x 4912 px | 7264 x 5440 px |
| Processor | Expeed 4 | PRIME II |
| Nikon D810 | Pentax 645D | |
|---|---|---|
| ISO |
|
|
| ISO minimum | 64 | 100 |
| ISO maximum | 51200 | 1600 |
| Boosted ISO minimum | 32 | 100 |
| White balance presets | 12 | 8 |
| White balance modes |
|
|
| Custom white balance | yes | yes |
| Supported image file formats |
|
|
| Image stabilization type | No | No |
| Uncompressed format | RAW + TIFF | RAW |
| HDR | yes | yes |
| AEB/HDR support | yes | yes |
| Nikon D810 | Pentax 645D | |
|---|---|---|
| Lens mount | Nikon F | Pentax 645AF2 |
| Magnification (Crop factor) | 1.0 x | 1.3 x |
| AF assist (auto-focus assist light) | Lamp | no |
| Focus adjustment | Manual | Auto |
| Contrast autofocus | yes | no |
| Focal length multiplier | 1x | 1x |
| Autofocus |
|
|
| Manual focus | yes | yes |
| Number of focus points | 51 | 11 |
| Max number of AF points (incl. assistant) | 51 | 11 |
| Image stabiliser | Lens based only | No |
| Phase detection autofocus | yes | yes |
| Nikon D810 | Pentax 645D | |
|---|---|---|
| Screen size | 3.2 in | 3.0 in |
| Articulated LCD | no | no |
| Screen technology | LCD TFT | LCD TFT |
| Screen dots | 1229000 | 921000 |
| Touch screen | no | no |
| Viewfinder | Optical | Optical |
| Viewfinder coverage | 100.0 % | 98.0 % |
| Viewfinder magnification | 0.7 x | 0.17 x |
| Separate info display | yes | yes |
| Nikon D810 | Pentax 645D | |
|---|---|---|
| Minimum shutter speed | 30.0 s | 30.0 s |
| Maximum shutter speed | 1.0 s | 1.0 s |
| Shutter priority | yes | yes |
| Aperture priority | yes | yes |
| Manual exposure mode | yes | yes |
| Exposure compensation plus | 5 | 5 |
| Exposure compensation minus | -5 | -5 |
| Expousure compensation steps |
|
|
| AE EV steps |
|
|
| Continuous shooting | yes | yes |
| AE frames |
|
|
| Subject / scene modes | no | no |
| Flash sync speed | 1/250s | 1/125s |
| Built-in flash | yes | no |
| Flash modes | Manual |
|
| External flash connection | Hot shoe |
|
| Flash metering system | i-TTL | P-TTL |
| External flash | yes | yes |
| Continuous drive | 5.0 fps | 1.1 fps |
| Self-timer | yes | yes |
| Metering modes |
|
|
| Manual settings | yes | yes |
| Self-timer options |
|
|
| Speed (JPEG) | 5.0 fps | 1.1 fps |
| Speed (RAW) | 5.0 fps | 1.1 fps |
| Nikon D810 | Pentax 645D | |
|---|---|---|
| Video recording | yes | no |
| Nikon D810 | Pentax 645D | |
|---|---|---|
| Microphone type | Stereo | Stereo |
| Nikon D810 | Pentax 645D | |
|---|---|---|
| Body type | SLR | SLR |
| Body material | Aluminum-magnesium | Aluminum-magnesium |
| Colour of product | Black | Black |
| Anti-dust system | yes | yes |
| Environmentally sealed | yes | yes |
| Nikon D810 | Pentax 645D | |
|---|---|---|
| Weight | 31.04 oz | 49.38 oz |
| Width | 5.75 in | 6.14 in |
| Height | 3.21 in | 4.61 in |
| Depth | 4.84 in | 4.69 in |
| Nikon D810 | Pentax 645D | |
|---|---|---|
| Compatible memory cards |
|
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| Storage types |
|
|
| Nikon D810 | Pentax 645D | |
|---|---|---|
| Power source type | Battery | Battery |
| Battery life (CIPA) | 1200 | 800 |
| Battery technology | Lithium-Ion | Lithium-Ion |
| Nikon D810 | Pentax 645D | |
|---|---|---|
| HDMI | yes | yes |
| USB connector type | Micro-USB B | Mini-USB B |
| USB version | 3.1 | 2.0 |
| Remote control | yes | yes |
| NFC | no | no |
| Wireless network (Wi-Fi) | no | no |
| Bluetooth | no | no |
| Firewire | no | no |
| Nikon D810 | Pentax 645D | |
|---|---|---|
| GPS | no | no |
| Pros | ||
|---|---|---|
| Cons |
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