Compare Pentax 645Z vs Sony a7R II vs Sony a7S II
Connectivity
Ports
HDMI + Microphone + Remote Control + USB 3.0
HDMI + Headphone + Microphone + Remote Control + USB 2.0
HDMI + Headphone + Microphone + Remote Control + USB 2.0
Wireless Connectivity
802.11b/g/n with NFC
802.11b/g/n with NFC
Construction
Form Factor
Mirrorless camera
Mirrorless camera
Image Size
Medium format (645)
Full frame (35.9 x 24 mm)
Full frame (35.6 x 23.8 mm)
Lens Mount
PENTAX 645AF2
Sony E-mount
Sony E-mount
Microphone
Mono
Stereo
Stereo
Sensor | Resolution
51 MP (8256 x 6192)
42 MP (7952 x 5304)
12 MP (4240 x 2832)
Sensor | Type
CMOS
BSI-CMOS
CMOS
Speakers
Stereo
Mono
Mono
Dimensions
Size | Depth
123 mm / 4.84 in
60 mm / 2.36 in
60 mm / 2.36 in
Size | Height
117 mm / 4.61 in
96 mm / 3.78 in
96 mm / 3.78 in
Size | Width
156 mm / 6.14 in
127 mm / 5.00 in
127 mm / 5.00 in
Weight
1550 g / 54.77 oz
625 g / 22.08 oz
627 g / 22.16 oz
Display
Display Diagonal
3.2 inch
3 inch
3 inch
Display Type
Tilting TFT LCD
Tilting TFT LCD
Tilting TFT-LCD
Resolution
1,037,000 dots
1,228,800 dots
1,228,800 dots
Viewfinder | Coverage
98%
100%
100%
Viewfinder | Magnification
0.62x
0.78x
0.78x
Viewfinder | Resolution
2,359,296 dots
2,359,296 dots
Viewfinder | Type
Optical (pentaprism)
Electronic
Electronic
Function
AE Bracketing
±5 (2, 3, 5 frames at 1/3 EV, 1/2 EV, 1 EV, 2 EV steps)
±5 (3, 5 frames at 1/3 EV, 1/2 EV, 2/3 EV, 1 EV, 2 EV steps)
±5 (3, 5 frames at 1/3 EV, 1/2 EV, 2/3 EV, 1 EV, 2 EV steps)
Autofocus
27 focus points
399 focus points
169 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 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
GPS
Optional via O-GPS1
No
No
ISO Range
to, ISO 100 ~ 204800
100 ~ 25600 (expands to 50 ~ 102400)
100 ~ 102400 (expands to 50 ~ 409600)
Image Stabilization
No
5-axis (4.5 stops per CIPA standard)
5-axis
Intervalometer
Yes
Yes
No
Processor
PRIME III
Bionz X
Bionz X
Touch Screen
No
No
No
Video Codecs
MPEG-4, H.264
MPEG-4, AVCHD, XAVC S
MPEG-4, AVCHD, XAVC S
Weather Resistance
Yes
Yes
Yes
Performance
Battery Life
650 shots
290 shots
370 shots
Max Burst Rate
3.0 fps
5.0 fps
5.0 fps
Storage
Dual SD/SDHC/SDXC slots
SD/SDHC/SDXC, Memory Stick Duo/Pro Duo/Pro-HG Duo
SD/SDHC/SDXC, Memory Stick Duo/Pro Duo/Pro-HG Duo
Production
Battery
D-LI90 lithium-ion battery and charger
NP-FW50 lithium-ion battery and charger
NP-FW50 lithium-ion battery and charger
Debut
2014-04-15
2015-06-10
2015-09-11
Model Name
ILCE-7RM2
ILCE-7SM2
Reviews
Neofiliac score
62%
63%
51%
Pros
- Long battery life
- Medium format look
- Exceptionally high 51 MP resolution
- Weather-sealed
- Affordable for a 645 DSLR
- Rather compact
- High 42 MP resolution
- Weather-sealed
- Rather compact
- Weather-sealed
- Great low-light capability
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
- Poor battery life
- Very low 5.0 fps burst rate
- Viewfinder with low 0.78x magnification
- Low resolution EVF
- Menu not touch-enabled
- Very low 5.0 fps burst rate
- Very low 12 MP resolution
- Viewfinder with low 0.78x magnification
- Low resolution EVF
- Lacks intervalometer for timelapse
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