Compare Pentax K-S2 vs Pentax K-3 II vs Pentax 645D
Connectivity
Ports
HDMI + Remote Control + USB 2.0
HDMI + Headphone + Microphone + Remote Control + USB 3.0
Remote Control + USB 2.0
Wireless Connectivity
With NFC support
Special version of Flu Card available
Construction
Form Factor
DSLR camera
DSLR camera
Image Size
APS-C (23.5 x 15.6 mm)
APS-C (23.5 x 15.6 mm)
Medium format (645)
Lens Mount
Pentax K-mount
Pentax K-mount
Microphone
Stereo
Mono
Stereo
Sensor | Resolution
20 MP (5472 x 3648)
24 MP (6016 x 4000)
40 MP (7264 x 5440)
Sensor | Type
CMOS
CMOS
CCD
Speakers
Mono
Mono
None
Dimensions
Size | Depth
73 mm / 2.87 in
77 mm / 3.03 in
119 mm / 4.69 in
Size | Height
123 mm / 4.84 in
100 mm / 3.94 in
117 mm / 4.61 in
Size | Width
91 mm / 3.58 in
131 mm / 5.16 in
156 mm / 6.14 in
Weight
678 g / 23.96 oz
800 g / 28.27 oz
1480 g / 52.30 oz
Display
Display Diagonal
3 inch
3.2 inch
3 inch
Display Type
Fully articulated TFT-LCD
Fixed TFT LCD monitor
Fixed TFT Color LCD with wide-viewing angle and with AR coating
Resolution
921,000 dots
1,037,000 dots
921,000 dots
Viewfinder | Coverage
100%
100%
98%
Viewfinder | Magnification
0.95x
0.95x
0.85x
Viewfinder | Type
Optical (pentaprism)
Optical (pentaprism)
Optical (pentaprism)
Function
AE Bracketing
±5 (3 frames at 1 EV, 2 EV steps)
±2 (2, 3, 5 frames at 1/3 EV, 1/2 EV steps)
±2 (3, 5 frames at 1/7 EV, 1/5 EV, 1/3 EV, 1/2 EV, 2/3 EV, 1 EV steps)
Autofocus
11 focus points
27 focus points
11 focus points
Crop Factor
1.5
1.5
0.6
Exposure Compensation
±5 (at 1/3 EV, 1/2 EV steps)
±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
Auto / Aperture Priority / Shutter Priority / Manual
Flash
Built-in
GPS
Optional O-GPS1
Yes
No
ISO Range
100 ~ 51200
100 ~ 51200
200, 400, 800, 1600 (100 with boost)
Image Stabilization
4.5 stops of shake reduction
No
Intervalometer
Yes
Yes
Yes
Processor
PRIME MII
Prime III
Prime II
Touch Screen
No
No
No
Video Codecs
MPEG-4, H.264
MPEG-4, H.264
Weather Resistance
Yes
Yes
Yes
Performance
Battery Life
410 shots
720 shots
Flash Range
12.00 m
Max Burst Rate
5.4 fps
8.3 fps
1.1 fps
Storage
SD/SDHC/SDXC
Dual SD/SDHC/SDXC
SD/SDHC
Production
Battery
D-LI109 lithium-ion battery & charger
Lithium-Ion D-LI90 rechargeable battery & charger
Lithium-Ion D-LI90 rechargeable battery & charger
Debut
2015-02-09
2015-04-22
2010-03-10
Reviews
Neofiliac score
57%
60%
57%
Pros
- Fully articulated LCD
- Weather-sealed
- Exceptional battery life
- Built-in GPS functionality
- Weather-sealed
- Medium format look
- Weather-sealed
- Affordable for a 645 DSLR
Cons
- Menu not touch-enabled
- Low 5.4 fps burst rate
- Very bulky
- Low 20 MP resolution
- Menu not touch-enabled
- Menu not touch-enabled
- Very low 1.1 fps burst rate
- Very large in size
- Very heavy
- Viewfinder coverage is cropped at 98%
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