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Pentax 645Z vs Pentax K-S2

Portability
49
Imaging
80
Features
74
Overall
77
Pentax 645Z front
 
Pentax K-S2 front
Portability
64
Imaging
64
Features
82
Overall
71

Pentax 645Z vs Pentax K-S2 Key Specs

Pentax 645Z
(Full Review)
  • 51MP - Medium format Sensor
  • 3.2" Tilting Screen
  • ISO 100 - 204800
  • No Anti-Alias Filter
  • 1920 x 1080 video
  • Pentax 645AF2 Mount
  • 1550g - 156 x 117 x 123mm
  • Revealed April 2014
  • Old Model is Pentax 645D
Pentax K-S2
(Full Review)
  • 20MP - APS-C Sensor
  • 3" Fully Articulated Screen
  • ISO 100 - 51200
  • Sensor based Image Stabilization
  • No Anti-Alias Filter
  • 1/6000s Maximum Shutter
  • 1920 x 1080 video
  • Pentax KAF2 Mount
  • 678g - 123 x 91 x 73mm
  • Released February 2015
  • Earlier Model is Pentax K-S1
Photography Glossary

Pentax 645Z vs Pentax K-S2 Overview

Its time to look more in depth at the Pentax 645Z and Pentax K-S2, former being a Pro DSLR while the latter is a Entry-Level DSLR and they are both offered by Pentax. There is a noticeable difference among the resolutions of the 645Z (51MP) and K-S2 (20MP) and the 645Z (Medium format) and K-S2 (APS-C) posses totally different sensor sizes.

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The 645Z was brought out 10 months prior to the K-S2 which means that they are both of a similar age. Both of the cameras have different body design with the Pentax 645Z being a Large SLR camera and the Pentax K-S2 being a Compact SLR camera.

Before we go straight to a step-by-step comparison, here is a concise synopsis of how the 645Z matches up against the K-S2 in terms of portability, imaging, features and an overall grade.

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Reasons to pick Pentax 645Z over the Pentax K-S2

 645Z K-S2 
Screen dimensions3.2"3"Bigger screen (+0.2")
Screen resolution1037k921kClearer screen (+116k dot)

Reasons to pick Pentax K-S2 over the Pentax 645Z

 K-S2 645Z 
ReleasedFebruary 2015April 2014More recent by 10 months
Screen typeFully ArticulatedTiltingFully Articulating screen
Selfie screen Take selfies

Common features in the Pentax 645Z and Pentax K-S2

 645Z K-S2 
Focus manually More accurate focusing
Touch screen Missing Touch screen

Pentax 645Z vs Pentax K-S2 Physical Comparison

For anybody who is planning to lug around your camera, you will want to think about its weight and volume. The Pentax 645Z has physical dimensions of 156mm x 117mm x 123mm (6.1" x 4.6" x 4.8") accompanied by a weight of 1550 grams (3.42 lbs) while the Pentax K-S2 has sizing of 123mm x 91mm x 73mm (4.8" x 3.6" x 2.9") accompanied by a weight of 678 grams (1.49 lbs).

Check the Pentax 645Z and Pentax K-S2 in our brand new Camera plus Lens Size Comparison Tool. Camera Size Comparison with Lenses

Do not forget, the weight of an ILC will differ dependant on the lens you select during that time. Underneath is a front view scale comparison of the 645Z compared to the K-S2.

Pentax 645Z vs Pentax K-S2 size comparison

Taking into consideration size and weight, the portability rating of the 645Z and K-S2 is 49 and 64 respectively.

Pentax 645Z vs Pentax K-S2 top view buttons comparison

Pentax 645Z vs Pentax K-S2 Sensor Comparison

Often, it is tough to envision the gap in sensor measurements merely by researching technical specs. The photograph below will help provide you a greater sense of the sensor dimensions in the 645Z and K-S2.

As you have seen, both the cameras have different resolutions and different sensor measurements. The 645Z featuring a bigger sensor will make shooting shallow depth of field easier and the Pentax 645Z will render extra detail having its extra 31MP. Higher resolution will also let you crop shots a bit more aggressively. The older 645Z will be behind in sensor tech.

Pentax 645Z vs Pentax K-S2 sensor size comparison

Pentax 645Z vs Pentax K-S2 Screen and ViewFinder

Pentax 645Z vs Pentax K-S2 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Pentax 645Z Portrait photography information
Pentax K-S2 Portrait photography information
88
you can focus manually
fantastic MP (51 megapixels)
sensor size is big (Medium format)
features face detect focus
saves RAW files
78
you can focus manually
megapixel count decent (20MP)
good sensor size (APS-C)
provides face detection autofocus
supports RAW files
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Street Comparison

Pentax 645Z as a Street photography camera
Pentax K-S2 as a Street photography camera
63
screen tilts
sensor size is big (Medium format)
saves RAW files
environment sealing
above average high ISO (204,800)
does not have image stabilization
more heavy than competitors in class (1,550 grams)
72
screen articulates fully
built in image stabilization (Sensor based)
good sensor size (APS-C)
supports RAW files
weather proof
above average high ISO (51,200)
heavier than competition in class (678 grams)
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Sports Comparison

Pentax 645Z as a Sports photography camera
Pentax K-S2 as a Sports photography camera
71
fantastic MP (51 megapixels)
sensor size is big (Medium format)
features tracking focus
environment sealing
sensor has phase detect auto focus
continuous shooting slow (3.0 fps)
does not have image stabilization
bad battery (650 per charge)
70
max shutter speed is good (1/6,000 seconds)
built in image stabilization (Sensor based)
megapixel count decent (20 megapixels)
good sensor size (APS-C)
provides tracking autofocus
weather proof
sensor has phase detect autofocus
max frames per second low (5.4 fps)
low battery pack (410 per charge)
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Travel Comparison

Pentax 645Z Travel photography details
Pentax K-S2 Travel photography details
51
environment sealing
fantastic MP (51MP)
bad battery (650 per charge)
more heavy than competitors in class (1,550 grams)
display isn't selfie friendly
65
weather proof
megapixel count decent (20MP)
has built in flash
selfie friendly screen
low battery pack (410 shots)
heavier than competition in class (678 grams)
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Landscape Comparison

Landscape photography with Pentax 645Z
Landscape photography with Pentax K-S2
78
you can focus manually
interchangeable lenses (Pentax 645AF2 mount)
screen size is good (3.2 inches)
fantastic MP (51 megapixels)
sensor size is big (Medium format)
no anti-alias filter
above average high ISO (204,800)
saves RAW files
environment sealing
two card slots
does not have image stabilization
bad battery (650 CIPA)
77
you can focus manually
change lenses (Pentax KAF2 mount)
screen size is decent (3")
built in image stabilization (Sensor based)
megapixel count decent (20MP)
good sensor size (APS-C)
no anti aliasing filter
above average high ISO (51,200)
supports RAW files
weather proof
low battery pack (410 per charge)
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Vlogging Comparison

Pentax 645Z as a Vlogging camera
Pentax K-S2 as a Vlogging camera
27
features face detect focus
high res video (1920 x 1080 pixels)
includes microphone socket
display isn't selfie friendly
does not have image stabilization
more heavy than competitors in class (1,550g)
71
selfie friendly screen
built in image stabilization (Sensor based)
provides face detection autofocus
video resolution high (1920 x 1080 resolution)
includes external mic socket
heavier than competition in class (678 grams)
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Pentax 645Z vs Pentax K-S2 Specifications

Detailed spec comparison table for Pentax 645Z and Pentax K-S2
 Pentax 645ZPentax K-S2
General Information
Brand Pentax Pentax
Model Pentax 645Z Pentax K-S2
Class Pro DSLR Entry-Level DSLR
Revealed 2014-04-15 2015-02-10
Physical type Large SLR Compact SLR
Sensor Information
Powered by PRIME III PRIME MII
Sensor type CMOS CMOS
Sensor size Medium format APS-C
Sensor dimensions 44 x 33mm 23.5 x 15.6mm
Sensor area 1,452.0mm² 366.6mm²
Sensor resolution 51 megapixels 20 megapixels
Anti aliasing filter
Aspect ratio 4:3 3:2
Peak resolution 8256 x 6192 5472 x 3648
Highest native ISO 204800 51200
Lowest native ISO 100 100
RAW support
Autofocusing
Manual focus
Autofocus touch
Autofocus continuous
Single autofocus
Autofocus tracking
Autofocus selectice
Autofocus center weighted
Multi area autofocus
Live view autofocus
Face detection focus
Contract detection focus
Phase detection focus
Number of focus points 27 11
Lens
Lens mounting type Pentax 645AF2 Pentax KAF2
Number of lenses 6 151
Crop factor 0.8 1.5
Screen
Type of screen Tilting Fully Articulated
Screen sizing 3.2" 3"
Screen resolution 1,037k dots 921k dots
Selfie friendly
Liveview
Touch function
Viewfinder Information
Viewfinder type Optical (pentaprism) Optical (pentaprism)
Viewfinder coverage 98 percent 100 percent
Viewfinder magnification 0.85x 0.64x
Features
Min shutter speed 30 secs 30 secs
Max shutter speed 1/4000 secs 1/6000 secs
Continuous shutter rate 3.0 frames/s 5.4 frames/s
Shutter priority
Aperture priority
Manual mode
Exposure compensation Yes Yes
Set white balance
Image stabilization
Inbuilt flash
Flash range no built-in flash 12.00 m (at ISO 100)
Flash settings Flash On, Flash On+Red-eye Reduction, Slow-speed Sync, Slow-speed Sync+Red-eye, P-TTL, Trailing Curtain Sync, contrast-control-sync, high-speed sync, wireless sync Auto, auto w/redeye reduction, flash on, flash on + redeye reduction, slow sync, trailing curtain sync, manual flash
Hot shoe
Auto exposure bracketing
WB bracketing
Max flash synchronize 1/125 secs -
Exposure
Multisegment exposure
Average exposure
Spot exposure
Partial exposure
AF area exposure
Center weighted exposure
Video features
Supported video resolutions 1920 x 1080 (60i, 50i, 30p, 25p, 24p), 1280 x 720 (60p, 50p, 30p, 25p,24p) 1920 x 1080 (30p, 25p, 24p), 1280 x 720 (60p, 50p)
Highest video resolution 1920x1080 1920x1080
Video data format MPEG-4, H.264 MPEG-4, H.264
Mic port
Headphone port
Connectivity
Wireless None Built-In
Bluetooth
NFC
HDMI
USB USB 3.0 (5 GBit/sec) USB 2.0 (480 Mbit/sec)
GPS Optional Optional
Physical
Environment sealing
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 1550g (3.42 lbs) 678g (1.49 lbs)
Physical dimensions 156 x 117 x 123mm (6.1" x 4.6" x 4.8") 123 x 91 x 73mm (4.8" x 3.6" x 2.9")
DXO scores
DXO Overall score 101 not tested
DXO Color Depth score 26.0 not tested
DXO Dynamic range score 14.7 not tested
DXO Low light score 4505 not tested
Other
Battery life 650 images 410 images
Battery type Battery Pack Battery Pack
Battery model D-LI90 D-LI109
Self timer Yes (2 or 10 secs) Yes (2 or 12 secs)
Time lapse recording
Storage type Dual SD/SDHC/SDXC slots SD/SDHC/SDXC
Card slots Dual One
Launch price $5,024 $581