Compare Pentax 645D vs Pentax K-3 Mark III
Connectivity
Ports
Remote Control + USB 2.0
HDMI + Headphone + Microphone + Remote Control + USB 3.2 Gen 1
Wireless Connectivity
802.11b/g/n + Bluetooth
Construction
Form Factor
DSLR camera
Image Size
Medium format (645)
APS-C (23 x 15.5 mm)
Lens Mount
Pentax K-mount
Microphone
Stereo
Stereo
Sensor | Resolution
40 MP (7264 x 5440)
26 MP (6192 x 4128)
Sensor | Type
CCD
CMOS
Speakers
None
Mono
Dimensions
Size | Depth
119 mm / 4.69 in
74 mm / 2.91 in
Size | Height
117 mm / 4.61 in
104 mm / 4.09 in
Size | Width
156 mm / 6.14 in
135 mm / 5.31 in
Weight
1480 g / 52.30 oz
820 g / 28.98 oz
Display
Display Diagonal
3 inch
3.2 inch
Display Type
Fixed TFT Color LCD with wide-viewing angle and with AR coating
Fixed TFT LCD
Resolution
921,000 dots
1,620,000 dots
Viewfinder | Coverage
98%
100%
Viewfinder | Magnification
0.85x
1.05x
Viewfinder | Type
Optical (pentaprism)
Optical (pentaprism)
Function
AE Bracketing
±2 (3, 5 frames at 1/7 EV, 1/5 EV, 1/3 EV, 1/2 EV, 2/3 EV, 1 EV steps)
±5 (2, 3, 5 frames at 1/3 EV, 1/2 EV steps)
Autofocus
11 focus points
101 focus points (25 cross type)
Crop Factor
0.6
1.5
Exposure Compensation
±5 (at 1/3 EV, 1/2 EV steps)
±5 (at 1/3 EV, 1/2 EV steps)
Exposure Mode
Auto / Aperture Priority / Shutter Priority / Manual
Auto / Aperture Priority / Shutter Priority / Manual
GPS
No
No
ISO Range
200, 400, 800, 1600 (100 with boost)
(100 ~ 1600000)
Image Stabilization
No
5.5 stops
Intervalometer
Yes
Yes
Processor
Prime II
PRIME V
Touch Screen
No
Yes
Video Codecs
MPEG-4, H.264
Weather Resistance
Yes
Yes
Performance
Battery Life
800 shots
Max Burst Rate
1.1 fps
12.0 fps
Storage
SD/SDHC
Dual SD/SDHC/SDXC slots (UHS-II supported in slot 1)
Production
Battery
Lithium-Ion D-LI90 rechargeable battery & charger
D-LI90
Debut
2010-03-10
2021-03-30
Reviews
Neofiliac score
57%
69%
Pros
- Medium format look
- Weather-sealed
- Affordable for a 645 DSLR
- Exceptional battery life
- 5.5 stops of IBIS
- Good 12.0 fps burst rate
- Weather-sealed
- Viewfinder with great 1.05x magnification
- Supports both WiFi and Bluetooth
Cons
- Menu not touch-enabled
- Very low 1.1 fps burst rate
- Very large in size
- Very heavy
- Viewfinder coverage is cropped at 98%
- Quite heavy
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