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Pentax 645D vs Pentax K-S2

Portability
50
Imaging
76
Features
52
Overall
66
Pentax 645D front
 
Pentax K-S2 front
Portability
64
Imaging
64
Features
82
Overall
71

Pentax 645D vs Pentax K-S2 Key Specs

Pentax 645D
(Full Review)
  • 40MP - Medium format Sensor
  • 3" Fixed Screen
  • ISO 200 - 1600
  • No Anti-Alias Filter
  • No Video
  • Pentax 645AF2 Mount
  • 1480g - 156 x 117 x 119mm
  • Released March 2010
  • Renewed by Pentax 645Z
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 Max Shutter
  • 1920 x 1080 video
  • Pentax KAF2 Mount
  • 678g - 123 x 91 x 73mm
  • Introduced February 2015
  • Older Model is Pentax K-S1
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Pentax 645D vs Pentax K-S2 Overview

Its time to look a bit more closely at the Pentax 645D versus Pentax K-S2, one being a Pro DSLR and the latter is a Entry-Level DSLR and both of them are sold by Pentax. There exists a big gap between the image resolutions of the 645D (40MP) and K-S2 (20MP) and the 645D (Medium format) and K-S2 (APS-C) possess totally different sensor measurements.

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The 645D was announced 5 years prior to the K-S2 and that is quite a big gap as far as technology is concerned. Both of these cameras offer different body type with the Pentax 645D being a Large SLR camera and the Pentax K-S2 being a Compact SLR camera.

Before we go through a thorough comparison, below is a concise summation of how the 645D matches up against the K-S2 in the way of portability, imaging, features and an overall rating.

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

 645D K-S2 

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

 K-S2 645D 
IntroducedFebruary 2015March 2010Fresher by 59 months
Screen typeFully ArticulatedFixed Fully Articulating screen
Selfie screen Easy selfies

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

 645D K-S2 
Manual focus More accurate focus
Screen sizing3"3"Equivalent screen measurements
Screen resolution921k921kExact same screen resolution
Touch screen Neither offers Touch screen

Pentax 645D vs Pentax K-S2 Physical Comparison

In case you're intending to carry your camera frequently, you are going to need to think about its weight and volume. The Pentax 645D offers outer measurements of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") accompanied by a weight of 1480 grams (3.26 lbs) whilst the Pentax K-S2 has sizing of 123mm x 91mm x 73mm (4.8" x 3.6" x 2.9") and a weight of 678 grams (1.49 lbs).

Contrast the Pentax 645D versus Pentax K-S2 in the latest Camera with Lens Size Comparison Tool. Camera Size Comparison with Lenses

Take into account, the weight of an Interchangeable Lens Camera will change depending on the lens you have chosen at the time. The following is the front view size comparison of the 645D compared to the K-S2.

Pentax 645D vs Pentax K-S2 size comparison

Considering dimensions and weight, the portability grade of the 645D and K-S2 is 50 and 64 respectively.

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

Pentax 645D vs Pentax K-S2 Sensor Comparison

Normally, it is tough to see the contrast between sensor sizing merely by going over technical specs. The visual underneath might provide you a better sense of the sensor measurements in the 645D and K-S2.

As you have seen, the 2 cameras offer different megapixels and different sensor sizing. The 645D having a bigger sensor will make getting bokeh less difficult and the Pentax 645D will offer more detail with its extra 20 Megapixels. Higher resolution will help you crop photographs a little more aggressively. The older 645D is going to be disadvantaged in sensor innovation.

Pentax 645D vs Pentax K-S2 sensor size comparison

Pentax 645D vs Pentax K-S2 Screen and ViewFinder

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

Portrait Comparison

Pentax 645D Portrait photography features
Pentax K-S2 Portrait photography features
77
focusing manually
amazing megapixels (40MP)
great sensor size (Medium format)
saves RAW files
doesn't have liveview
78
focusing manually
decent MP (20 megapixels)
nice sensor size (APS-C)
has face detection focus
exports RAW files
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Street Comparison

Pentax 645D Street photography advice
Pentax K-S2 Street photography advice
58
great sensor size (Medium format)
saves RAW files
environment proofing
no articulating screen
lack of image stabilization
72
screen articulates fully
image stabilization (Sensor based)
nice sensor size (APS-C)
exports RAW files
weather proof
above average ISO range (51,200)
more heavy than competition in class (678g)
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Sports Comparison

Pentax 645D Sports photography factors
Pentax K-S2 Sports photography factors
63
amazing megapixels (40MP)
great sensor size (Medium format)
environment proofing
sensor has phase detect AF
doesn't have liveview
max frames per second very slow (1.0 fps)
lack of image stabilization
low battery (800 CIPA)
70
great max shutter speed (1/6,000 seconds)
image stabilization (Sensor based)
decent MP (20MP)
nice sensor size (APS-C)
has tracking autofocus
weather proof
comes with phase detect auto focus
painfully slow continuous shooting (5.4 frames per second)
terrible battery power (410 per charge)
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Travel Comparison

Pentax 645D Travel photography information
Pentax K-S2 Travel photography information
55
environment proofing
amazing megapixels (40MP)
low battery (800 shots)
screen isn't selfie friendly
65
weather proof
decent MP (20MP)
built-in flash
display is selfie friendly
terrible battery power (410 per charge)
more heavy than competition in class (678 grams)
Photography Glossary

Landscape Comparison

Pentax 645D Landscape photography info
Pentax K-S2 Landscape photography info
72
focusing manually
swap lenses (Pentax 645AF2 mount)
pretty good screen size (3 inch)
amazing megapixels (40MP)
great sensor size (Medium format)
doesnt have anti-alias filter
saves RAW files
environment proofing
2 card slots
doesn't have liveview
lack of image stabilization
low battery (800 per charge)
77
focusing manually
swap lenses (Pentax KAF2 mount)
screen size is good (3 inches)
image stabilization (Sensor based)
decent MP (20MP)
nice sensor size (APS-C)
doesnt have low pass filter
above average ISO range (51,200)
exports RAW files
weather proof
terrible battery power (410 shots)
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Vlogging Comparison

Vlogging with Pentax 645D
Vlogging with Pentax K-S2
9
no video shooting
71
display is selfie friendly
image stabilization (Sensor based)
has face detection focus
video res high (1920 x 1080 pixels)
does have external microphone socket
more heavy than competition in class (678 grams)
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Pentax 645D vs Pentax K-S2 Specifications

Detailed spec comparison table for Pentax 645D and Pentax K-S2
 Pentax 645DPentax K-S2
General Information
Make Pentax Pentax
Model Pentax 645D Pentax K-S2
Category Pro DSLR Entry-Level DSLR
Released 2010-03-10 2015-02-10
Physical type Large SLR Compact SLR
Sensor Information
Chip Prime II PRIME MII
Sensor type CCD CMOS
Sensor size Medium format APS-C
Sensor measurements 44 x 33mm 23.5 x 15.6mm
Sensor surface area 1,452.0mm² 366.6mm²
Sensor resolution 40 megapixels 20 megapixels
Anti aliasing filter
Aspect ratio 4:3 3:2
Maximum resolution 7264 x 5440 5472 x 3648
Maximum native ISO 1600 51200
Min native ISO 200 100
RAW pictures
Min boosted ISO 100 -
Autofocusing
Focus manually
Touch to focus
AF continuous
AF single
Tracking AF
AF selectice
Center weighted AF
Multi area AF
Live view AF
Face detection AF
Contract detection AF
Phase detection AF
Number of focus points 11 11
Lens
Lens mount Pentax 645AF2 Pentax KAF2
Amount of lenses 6 151
Crop factor 0.8 1.5
Screen
Screen type Fixed Type Fully Articulated
Screen diagonal 3 inches 3 inches
Resolution of screen 921 thousand dots 921 thousand dots
Selfie friendly
Liveview
Touch operation
Screen tech TFT Color LCD with wide-viewing angle and with AR coating -
Viewfinder Information
Viewfinder type Optical (pentaprism) Optical (pentaprism)
Viewfinder coverage 98% 100%
Viewfinder magnification 0.85x 0.64x
Features
Lowest shutter speed 30 seconds 30 seconds
Highest shutter speed 1/4000 seconds 1/6000 seconds
Continuous shooting rate 1.0 frames/s 5.4 frames/s
Shutter priority
Aperture priority
Manual mode
Exposure compensation Yes Yes
Custom WB
Image stabilization
Integrated flash
Flash range no built-in flash 12.00 m (at ISO 100)
Flash modes Auto, On, Off, Red-eye, Slow Sync, Rear Curtain Auto, auto w/redeye reduction, flash on, flash on + redeye reduction, slow sync, trailing curtain sync, manual flash
External flash
AEB
WB bracketing
Highest flash synchronize 1/125 seconds -
Exposure
Multisegment exposure
Average exposure
Spot exposure
Partial exposure
AF area exposure
Center weighted exposure
Video features
Video resolutions - 1920 x 1080 (30p, 25p, 24p), 1280 x 720 (60p, 50p)
Maximum video resolution None 1920x1080
Video format - MPEG-4, H.264
Microphone port
Headphone port
Connectivity
Wireless None Built-In
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS None Optional
Physical
Environment sealing
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 1480g (3.26 pounds) 678g (1.49 pounds)
Dimensions 156 x 117 x 119mm (6.1" x 4.6" x 4.7") 123 x 91 x 73mm (4.8" x 3.6" x 2.9")
DXO scores
DXO All around score 82 not tested
DXO Color Depth score 24.6 not tested
DXO Dynamic range score 12.6 not tested
DXO Low light score 1262 not tested
Other
Battery life 800 shots 410 shots
Battery type Battery Pack Battery Pack
Battery model D-LI90 D-LI109
Self timer Yes (2 or 10 sec) Yes (2 or 12 secs)
Time lapse feature
Type of storage SD/SDHC SD/SDHC/SDXC
Card slots Two 1
Cost at launch $4,000 $581