Pentax 645D vs Sony a7R IV
Comparison
Optics
Video
Features
Storage & Battery
Pentax 645D
Sony a7R IV
Winner!
Pentax 645D
vs
Sony a7R IV
Price
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Brand
Pentax
Sony
Model
645D
a7R IV
Released
2010
2019
Announcement Date
March 01, 2010
July 16, 2019
Camera Type
DSLR
MirrorlessCamera Size
Camera Weight
Optics
Pentax 645D
Sony a7R IV
Megapixels
40 MP
61.2 MP
Image Resolution
7264 x 5440 px
9504 x 6336 px
Sensor Type
CCD
CMOS
Sensor Size
33 x 44 mm
23.8 x 35.7 mm
Sensor Format
Medium Format
Full FrameFrame Rate
1.1 fps
10 fps
Lens Mount
Pentax 645AF2
Sony FE
Image Processor
Prime II
Bionz X
Aspect Ratio
4:3
3:2Minimum ISO (Native)
100
100
Maximum ISO (Native)
1,600
32,000
Minimum ISO (Expanded)
100
50
Maximum ISO (Expanded)
1600
102400
Minimum Shutter Speed
30 s
30 s
Maximum Shutter Speed
1/ 4000 s
1/ 8000 s
Autofocus Points
11
425
In-body Stabilization
Viewfinder Type
Optical (pentaprism)
Electronic
Viewfinder Resolution
N/A
5,760,000 dots
Video
Pentax 645D
Sony a7R IV
Video
Max Video Resolution
N/A
4KMax Video Dimensions
N/A
3840 x 2160 px
Max Video Frame Rate
N/A
30 p
Time-Lapse Built In
Video File Format
N/A
XAVC S, AVCHD Ver. 2.0, MP4
Features
Pentax 645D
Sony a7R IV
Built-in Flash
External Flash
GPS
Weather Sealing
Screen Type
LCD
LCD
Touch Screen
Screen Size
3"3"Screen Resolution
921,000 dots
1,440,000 dots
Flip Screen
Live View
Wi-Fi
Bluetooth
Storage and Battery
Pentax 645D
Sony a7R IV
Memory Card
SD / SDHC
SD / SDHC / SDXC (UHS-II compatible)
Dual Memory Card Slots
Battery Type
D-LI90
NP-FZ100
Battery Life
800 shots
670 shots
USB Charging
Overall Score
Portrait (Color Depth)
24.6 bits
26 bits
Landscape (Dynamic Range)
12.6 EVs
14.8 EVs
Sports (Low-Light ISO)
1262
3344
Scores
Pentax 645D
Sony a7R IV
User Scores
Pentax 645D
Sony a7R IV
B&H photo video
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