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Compare Pentax 645Z vs Nikon D810A vs Nikon D850

Connectivity

Ports
HDMI + Microphone + Remote Control + USB 3.0
HDMI + Headphone + Microphone + Remote Control + USB 3.0
HDMI + Headphone + Microphone + Remote Control + USB 3.0
Wireless Connectivity
via WT-5A or Eye-Fi
802.11b/g + NFC + Bluetooth 4.1 LE

Construction

Form Factor
DSLR camera
DSLR camera
Image Size
Medium format (645)
Full frame (35.9 x 24 mm)
Full frame (35.9 x 23.9 mm)
Lens Mount
PENTAX 645AF2
Nikon F-mount
Nikon F-mount
Microphone
Mono
Stereo
Stereo
Sensor | Resolution
51 MP (8256 x 6192)
36 MP (7360 x 4912)
45 MP (8256 x 5504)
Sensor | Type
CMOS
CMOS
BSI-CMOS
Speakers
Stereo
Mono
Mono

Dimensions

Size | Depth
123 mm / 4.84 in
82 mm / 3.23 in
79 mm / 3.11 in
Size | Height
117 mm / 4.61 in
123 mm / 4.84 in
124 mm / 4.88 in
Size | Width
156 mm / 6.14 in
146 mm / 5.75 in
146 mm / 5.75 in
Weight
1550 g / 54.77 oz
880 g / 31.10 oz
1005 g / 35.51 oz

Display

Display Diagonal
3.2 inch
3.2 inch
3.2 inch
Display Type
Tilting TFT LCD
Fixed TFT-LCD (RGBW)
Tilting TFT LCD
Resolution
1,037,000 dots
1,229,000 dots
2,359,000 dots
Viewfinder | Coverage
98%
100%
100%
Viewfinder | Magnification
0.62x
0.7x
0.75x
Viewfinder | Type
Optical (pentaprism)
Optical (tunnel)
Optical (pentaprism)

Function

AE Bracketing
±5 (2, 3, 5 frames at 1/3 EV, 1/2 EV, 1 EV, 2 EV steps)
±5 (2, 3, 5, 7 frames at 1/3 EV, 2/3 EV, 1 EV steps)
±5 (2, 3, 5, 7 frames at 1/3 EV, 1/2 EV, 2/3 EV, 1 EV steps)
Autofocus
27 focus points
51 focus points
151 focus points
Crop Factor
0.6
1.0
1.0
Exposure Compensation
±5 (at 1/3 EV, 1/2 EV steps)
±5 (at 1/3 EV, 1/2 EV, 1 EV steps)
±5 (at 1/3 EV, 1/2 EV, 1 EV steps)
Exposure Mode
Auto / Aperture Priority / Shutter Priority / Manual
Auto / Aperture Priority / Shutter Priority / Manual
Auto / Aperture Priority / Shutter Priority / Manual
Flash
Built-in
GPS
Optional via O-GPS1
Optional via GP-1 or GP-1A
No
ISO Range
to, ISO 100 ~ 204800
200 ~ 12800 (expandable to 100 ~ 51200)
64 ~ 25600 (expands to 32 ~ 102400)
Image Stabilization
No
No
No
Intervalometer
Yes
Yes
Yes
Processor
PRIME III
EXPEED 4
Expeed 5
Touch Screen
No
No
Yes
Video Codecs
MPEG-4, H.264
MPEG-4, H.264
MPEG-4
Weather Resistance
Yes
Yes
Yes

Performance

Battery Life
650 shots
1200 shots
1840 shots
Flash Range
12.00 m
Max Burst Rate
3.0 fps
5.0 fps
7.0 fps
Storage
Dual SD/SDHC/SDXC slots
SD/SDHC/SDXC, CompactFlash (UDMA compliant)
SD/SDHC/SDXC (UHS-II supported) + XQD

Production

Battery
D-LI90 lithium-ion battery and charger
EN-EL15 lithium-ion battery & charger
EN-EL15a lithium-ion battery & charger
Debut
2014-04-15
2015-02-10
2017-07-25

Reviews

Neofiliac score
62%
58%
73%
Pros
  • Long battery life
  • Medium format look
  • Exceptionally high 51 MP resolution
  • Weather-sealed
  • Affordable for a 645 DSLR
  • Exceptional battery life
  • Weather-sealed
  • Exceptional battery life
  • 64 base ISO
  • High 45 MP resolution
  • Weather-sealed
  • Supports both WiFi and Bluetooth
  • Exceptional ergonomics
Cons
  • Menu not touch-enabled
  • Very low 3.0 fps burst rate
  • Very large in size
  • Very heavy
  • Viewfinder coverage is cropped at 98%
  • Viewfinder with low 0.62x magnification
  • Menu not touch-enabled
  • 200 base ISO
  • Very low 5.0 fps burst rate
  • Quite heavy
  • Viewfinder with low 0.7x magnification
  • Low 7.0 fps burst rate
  • Very heavy
  • Viewfinder with low 0.75x magnification

Price

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