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Pentax K20D vs Sony A9 II

Portability
59
Imaging
53
Features
52
Overall
52
Pentax K20D front
 
Sony Alpha A9 Mark II front
Portability
62
Imaging
74
Features
93
Overall
81

Pentax K20D vs Sony A9 II Key Specs

Pentax K20D
(Full Review)
  • 15MP - APS-C Sensor
  • 2.7" Fixed Display
  • ISO 100 - 3200 (Expand to 6400)
  • Sensor based Image Stabilization
  • No Video
  • Pentax KAF2 Mount
  • 800g - 142 x 101 x 70mm
  • Revealed June 2008
  • Replaced the Pentax K10D
Sony A9 II
(Full Review)
  • 24MP - Full frame Sensor
  • 3" Tilting Screen
  • ISO 100 - 51200 (Increase to 204800)
  • Sensor based 5-axis Image Stabilization
  • 1/8000s Maximum Shutter
  • 3840 x 2160 video
  • Sony E Mount
  • 678g - 129 x 96 x 76mm
  • Revealed October 2019
  • Superseded the Sony A9
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Pentax K20D vs Sony A9 II Overview

Below is a extensive assessment of the Pentax K20D and Sony A9 II, former being a Advanced DSLR while the latter is a Pro Mirrorless by companies Pentax and Sony. There exists a sizable gap between the sensor resolutions of the K20D (15MP) and A9 II (24MP) and the K20D (APS-C) and A9 II (Full frame) possess different sensor size.

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The K20D was unveiled 12 years earlier than the A9 II and that is quite a significant difference as far as technology is concerned. The two cameras come with different body type with the Pentax K20D being a Mid-size SLR camera and the Sony A9 II being a SLR-style mirrorless camera.

Before going through a detailed comparison, below is a quick introduction of how the K20D scores versus the A9 II with regard to portability, imaging, features and an overall grade.

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Reasons to pick Pentax K20D over the Sony A9 II

 K20D A9 II 

Reasons to pick Sony A9 II over the Pentax K20D

 A9 II K20D 
RevealedOctober 2019June 2008More recent by 137 months
Screen typeTiltingFixed Tilting screen
Screen dimension3"2.7"Bigger screen (+0.3")
Screen resolution1440k230kSharper screen (+1210k dot)
Touch friendly screen Quickly navigate

Common features in the Pentax K20D and Sony A9 II

 K20D A9 II 
Manually focus Dial accurate focus
Selfie screen Neither contains selfie screen

Pentax K20D vs Sony A9 II Physical Comparison

When you are going to lug around your camera regularly, you are going to need to take into account its weight and measurements. The Pentax K20D has got exterior dimensions of 142mm x 101mm x 70mm (5.6" x 4.0" x 2.8") having a weight of 800 grams (1.76 lbs) while the Sony A9 II has proportions of 129mm x 96mm x 76mm (5.1" x 3.8" x 3.0") having a weight of 678 grams (1.49 lbs).

Analyze the Pentax K20D and Sony A9 II in our newest Camera plus Lens Size Comparison Tool. Camera Size Comparison with Lenses

Keep in mind, the weight of an ILC will vary dependant on the lens you are employing at the time. Here is the front view measurement comparison of the K20D against the A9 II.

Pentax K20D vs Sony A9 II size comparison

Looking at dimensions and weight, the portability score of the K20D and A9 II is 59 and 62 respectively.

Pentax K20D vs Sony A9 II top view buttons comparison

Pentax K20D vs Sony A9 II Sensor Comparison

Normally, it can be difficult to imagine the contrast between sensor measurements purely by going over specs. The visual below will offer you a more clear sense of the sensor dimensions in the K20D and A9 II.

All in all, each of the cameras posses different megapixel count and different sensor measurements. The K20D having a tinier sensor is going to make shooting bokeh more challenging and the Sony A9 II will offer you extra detail having an extra 9MP. Higher resolution will enable you to crop photographs somewhat more aggressively. The older K20D is going to be disadvantaged in sensor tech.

Pentax K20D vs Sony A9 II sensor size comparison

Pentax K20D vs Sony A9 II Screen and ViewFinder

Pentax K20D vs Sony A9 II Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Portrait photography with Pentax K20D
Portrait photography with Sony A9 II
71
has manual focus
resolution is good (15MP)
sensor size is decent (APS-C)
saves RAW formats
84
manual focus
resolution is good (24MP)
great sensor size (Full frame)
comes with face detect autofocus
exports RAW formats
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Street Comparison

Pentax K20D Street photography info
Sony A9 II Street photography info
65
has image stabilization (Sensor based)
sensor size is decent (APS-C)
saves RAW formats
environment sealing
no moving screen
78
tilting screen
image stabilization (Sensor based 5-axis)
great sensor size (Full frame)
exports RAW formats
offers focus by touch
environment proof
above average ISO range (51,200)
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Sports Comparison

Pentax K20D Sports photography details
Sony A9 II Sports photography details
68
has image stabilization (Sensor based)
resolution is good (15MP)
sensor size is decent (APS-C)
environment sealing
supports phase detect autofocus
slow continuous shooting (3.0 fps)
87
max shutter speed is good (1/8,000s)
quiet shutter (1/32,000s)
high max frames per second (20.0 fps)
image stabilization (Sensor based 5-axis)
resolution is good (24MP)
great sensor size (Full frame)
comes with tracking focus
environment proof
great battery power (690 CIPA)
sensor has phase detect autofocus
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Travel Comparison

Pentax K20D Travel photography features
Sony A9 II Travel photography features
64
environment sealing
resolution is good (15MP)
built-in flash
display is not selfie friendly
72
great battery power (690 shots)
environment proof
connects via bluetooth
offers focus by touch
resolution is good (24MP)
doesn't have a selfie friendly display
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Landscape Comparison

Pentax K20D as a Landscape photography camera
Sony A9 II as a Landscape photography camera
70
has manual focus
switch lenses (Pentax KAF2 mount)
has image stabilization (Sensor based)
resolution is good (15 megapixels)
sensor size is decent (APS-C)
saves RAW formats
environment sealing
small screen (2.7 inch)
85
manual focus
interchangeable lenses (Sony E mount)
screen is a good size (3")
image stabilization (Sensor based 5-axis)
resolution is good (24 megapixels)
great sensor size (Full frame)
above average ISO range (51,200)
exports RAW formats
environment proof
great battery power (690 CIPA)
two card slots
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Vlogging Comparison

Pentax K20D Vlogging advice
Sony A9 II Vlogging advice
9
lack of video recording
36
touchscreen capability
image stabilization (Sensor based 5-axis)
comes with face detect autofocus
high quality video (3840 x 2160 pxls)
includes mic socket
doesn't have a selfie friendly display
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Pentax K20D vs Sony A9 II Specifications

Detailed spec comparison table for Pentax K20D and Sony A9 II
 Pentax K20DSony Alpha A9 Mark II
General Information
Manufacturer Pentax Sony
Model type Pentax K20D Sony Alpha A9 Mark II
Class Advanced DSLR Pro Mirrorless
Revealed 2008-06-25 2019-10-03
Physical type Mid-size SLR SLR-style mirrorless
Sensor Information
Processor Chip - BIONZ X
Sensor type CMOS BSI-CMOS
Sensor size APS-C Full frame
Sensor dimensions 23.4 x 15.6mm 35.6 x 23.8mm
Sensor surface area 365.0mm² 847.3mm²
Sensor resolution 15MP 24MP
Anti alias filter
Aspect ratio 3:2 3:2
Highest resolution 4672 x 3104 6000 x 4000
Highest native ISO 3200 51200
Highest boosted ISO 6400 204800
Minimum native ISO 100 100
RAW photos
Minimum boosted ISO - 50
Autofocusing
Focus manually
Touch to focus
Continuous AF
Single AF
AF tracking
AF selectice
AF center weighted
AF multi area
Live view AF
Face detect focusing
Contract detect focusing
Phase detect focusing
Total focus points 11 693
Lens
Lens support Pentax KAF2 Sony E
Total lenses 151 121
Focal length multiplier 1.5 1
Screen
Display type Fixed Type Tilting
Display size 2.7" 3"
Resolution of display 230 thousand dots 1,440 thousand dots
Selfie friendly
Liveview
Touch friendly
Viewfinder Information
Viewfinder type Optical (pentaprism) Electronic
Viewfinder resolution - 3,686 thousand dots
Viewfinder coverage 95% 100%
Viewfinder magnification 0.64x 0.78x
Features
Lowest shutter speed 30 secs 30 secs
Highest shutter speed 1/4000 secs 1/8000 secs
Highest quiet shutter speed - 1/32000 secs
Continuous shooting rate 3.0 frames/s 20.0 frames/s
Shutter priority
Aperture priority
Expose Manually
Exposure compensation Yes Yes
Custom WB
Image stabilization
Inbuilt flash
Flash distance 13.00 m (at ISO 100) no built-in flash
Flash settings Auto, Red-Eye, Slow, Red-Eye Slow, Rear curtain, wireless Flash off, Autoflash, Fill-flash, Slow Sync., Rear Sync., Red-eye reduction, Wireless, Hi-speed sync
External flash
Auto exposure bracketing
White balance bracketing
Highest flash synchronize 1/180 secs -
Exposure
Multisegment exposure
Average exposure
Spot exposure
Partial exposure
AF area exposure
Center weighted exposure
Video features
Video resolutions - 3840 x 2160 @ 30p / 100 Mbps, XAVC S, MP4, H.264, Linear PCM
Highest video resolution None 3840x2160
Video file format - MPEG-4, AVCHD, H.264
Mic port
Headphone port
Connectivity
Wireless None Built-In
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 3.1 Gen 1 (5 GBit/sec)
GPS None None
Physical
Environmental sealing
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 800 gr (1.76 lb) 678 gr (1.49 lb)
Dimensions 142 x 101 x 70mm (5.6" x 4.0" x 2.8") 129 x 96 x 76mm (5.1" x 3.8" x 3.0")
DXO scores
DXO All around rating 65 not tested
DXO Color Depth rating 22.9 not tested
DXO Dynamic range rating 11.1 not tested
DXO Low light rating 639 not tested
Other
Battery life - 690 pictures
Type of battery - Battery Pack
Battery ID D-LI50 NP-FZ100
Self timer Yes (2 or 10 sec) Yes (2, 5, 10 secs + continuous, 3 or 5 frames)
Time lapse recording
Type of storage SD/MMC/SDHC card Dual SD/SDHC/SDXC slots (UHS-II compatible)
Card slots Single 2
Price at launch $700 $4,498