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Pentax K-3 II vs Sony RX100

Portability
59
Imaging
66
Features
84
Overall
73
Pentax K-3 II front
 
Sony Cyber-shot DSC-RX100 front
Portability
91
Imaging
50
Features
68
Overall
57

Pentax K-3 II vs Sony RX100 Key Specs

Pentax K-3 II
(Full Review)
  • 24MP - APS-C Sensor
  • 3.2" Fixed Screen
  • ISO 100 - 51200
  • Sensor based Image Stabilization
  • No Anti-Alias Filter
  • 1/8000s Maximum Shutter
  • 1920 x 1080 video
  • Pentax KAF2 Mount
  • 800g - 131 x 100 x 77mm
  • Released April 2015
  • Succeeded the Pentax K-3
Sony RX100
(Full Review)
  • 20MP - 1" Sensor
  • 3" Fixed Screen
  • ISO 100 - 25600
  • Optical Image Stabilization
  • 1920 x 1080 video
  • 28-100mm (F1.8-4.9) lens
  • 240g - 102 x 58 x 36mm
  • Announced August 2012
  • Later Model is Sony RX100 II
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Pentax K-3 II vs Sony RX100 Overview

Its time to look closer at the Pentax K-3 II and Sony RX100, former is a Advanced DSLR while the latter is a Large Sensor Compact by rivals Pentax and Sony. The image resolution of the K-3 II (24MP) and the RX100 (20MP) is relatively similar but the K-3 II (APS-C) and RX100 (1") use different sensor sizing.

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The K-3 II was introduced 2 years after the RX100 which is quite a large difference as far as technology is concerned. The two cameras come with different body type with the Pentax K-3 II being a Mid-size SLR camera and the Sony RX100 being a Large Sensor Compact camera.

Before getting in to a full comparison, below is a brief view of how the K-3 II scores against the RX100 in terms of portability, imaging, features and an overall score.

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Reasons to pick Pentax K-3 II over the Sony RX100

 K-3 II RX100 
AnnouncedApril 2015August 2012More modern by 33 months
Screen dimension3.2"3"Bigger screen (+0.2")

Reasons to pick Sony RX100 over the Pentax K-3 II

 RX100 K-3 II 
Screen resolution1229k1037kSharper screen (+192k dot)

Common features in the Pentax K-3 II and Sony RX100

 K-3 II RX100 
Manual focus More accurate focus
Screen typeFixed Fixed Fixed screen
Selfie screen Neither offers selfie screen
Touch friendly screen No Touch friendly screen

Pentax K-3 II vs Sony RX100 Physical Comparison

If you are planning to carry around your camera frequently, you'll have to take into account its weight and proportions. The Pentax K-3 II offers outer measurements of 131mm x 100mm x 77mm (5.2" x 3.9" x 3.0") accompanied by a weight of 800 grams (1.76 lbs) and the Sony RX100 has measurements of 102mm x 58mm x 36mm (4.0" x 2.3" x 1.4") having a weight of 240 grams (0.53 lbs).

Contrast the Pentax K-3 II and Sony RX100 in our brand new Camera & Lens Size Comparison Tool. Camera Size Comparison with Lenses

Take into consideration, the weight of an ILC will vary dependant on the lens you are utilizing during that time. Below is the front view dimension comparison of the K-3 II compared to the RX100.

Pentax K-3 II vs Sony RX100 size comparison

Using dimensions and weight, the portability score of the K-3 II and RX100 is 59 and 91 respectively.

Pentax K-3 II vs Sony RX100 top view buttons comparison

Pentax K-3 II vs Sony RX100 Sensor Comparison

Quite often, it is very hard to visualize the contrast between sensor sizes only by going over specs. The image below should offer you a far better sense of the sensor sizing in the K-3 II and RX100.

As you can plainly see, the two cameras have got different megapixels and different sensor sizes. The K-3 II having a bigger sensor is going to make shooting shallower depth of field easier and the Pentax K-3 II will offer you extra detail using its extra 4 Megapixels. Higher resolution can also let you crop pictures much more aggressively. The younger K-3 II should have a benefit with regard to sensor technology.

Pentax K-3 II vs Sony RX100 sensor size comparison

Pentax K-3 II vs Sony RX100 Screen and ViewFinder

Pentax K-3 II vs Sony RX100 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Portrait photography with Pentax K-3 II
Portrait photography with Sony RX100
79
manual focus
decent MP (24MP)
sensor size is decent (APS-C)
comes with face detection focus
saves RAW formats
64
manual focus
flash sync is higher than normal (1/2,000s)
MP count decent (20MP)
sensor size is good (1")
has face detect focus
saves RAW files
can't use external flash
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Street Comparison

Pentax K-3 II as a Street photography camera
Sony RX100 as a Street photography camera
69
has image stabilization (Sensor based)
sensor size is decent (APS-C)
saves RAW formats
weather proofing
good high ISO (51,200)
fixed screen
79
built in image stabilization (Optical)
sensor size is good (1")
saves RAW files
lighter than others in class (240g)
very good ISO range (25,600)
no moving screen
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Sports Comparison

Pentax K-3 II Sports photography factors
Sony RX100 Sports photography factors
76
maximum shutter speed is high (1/8,000 seconds)
has image stabilization (Sensor based)
decent MP (24 megapixels)
sensor size is decent (APS-C)
comes with tracking autofocus
weather proofing
comes with phase detect auto focus
bad battery (720 CIPA)
65
built in image stabilization (Optical)
MP count decent (20 megapixels)
sensor size is good (1")
has tracking focus
doesn't have phase detect auto focus
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Travel Comparison

Pentax K-3 II Travel photography features
Sony RX100 Travel photography features
56
weather proofing
decent MP (24MP)
bad battery (720 CIPA)
screen is not selfie friendly
79
lighter than others in class (240 grams)
MP count decent (20 megapixels)
flash built-in
rather wide (28mm)
very good maximum aperture (f1.8)
doesn't feature selfie friendly screen
Photography Glossary

Landscape Comparison

Pentax K-3 II Landscape photography information
Sony RX100 Landscape photography information
78
manual focus
change lenses (Pentax KAF2 mount)
screen size is good (3.2 inch)
has image stabilization (Sensor based)
decent MP (24MP)
sensor size is decent (APS-C)
does not have low pass filter
good high ISO (51,200)
saves RAW formats
weather proofing
has dual storage slots
bad battery (720 per charge)
74
manual focus
rather wide (28mm)
very good maximum aperture (f1.8)
screen size is good (3")
built in image stabilization (Optical)
MP count decent (20 megapixels)
sensor size is good (1")
very good ISO range (25,600)
saves RAW files
lens is fixed (fixed lens mount)
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Vlogging Comparison

Pentax K-3 II Vlogging information
Sony RX100 Vlogging information
34
has image stabilization (Sensor based)
comes with face detection focus
high video quality (1920 x 1080 resolution)
does have external mic jack
screen is not selfie friendly
38
rather wide (28mm)
very good maximum aperture (f1.8)
built in image stabilization (Optical)
has face detect focus
high quality video (1920 x 1080 resolution)
lighter than others in class (240 grams)
doesn't feature selfie friendly screen
missing mic port
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Pentax K-3 II vs Sony RX100 Specifications

Detailed spec comparison table for Pentax K-3 II and Sony RX100
 Pentax K-3 IISony Cyber-shot DSC-RX100
General Information
Company Pentax Sony
Model Pentax K-3 II Sony Cyber-shot DSC-RX100
Type Advanced DSLR Large Sensor Compact
Released 2015-04-23 2012-08-28
Body design Mid-size SLR Large Sensor Compact
Sensor Information
Processor Prime III -
Sensor type CMOS CMOS
Sensor size APS-C 1"
Sensor dimensions 23.5 x 15.6mm 13.2 x 8.8mm
Sensor area 366.6mm² 116.2mm²
Sensor resolution 24MP 20MP
Anti aliasing filter
Aspect ratio 3:2 1:1, 4:3, 3:2 and 16:9
Highest resolution 6016 x 4000 5472 x 3648
Highest native ISO 51200 25600
Min native ISO 100 100
RAW files
Autofocusing
Manual focus
Touch to focus
Continuous AF
Single AF
AF tracking
Selective AF
AF center weighted
AF multi area
AF live view
Face detection AF
Contract detection AF
Phase detection AF
Number of focus points 27 25
Cross focus points 25 -
Lens
Lens mounting type Pentax KAF2 fixed lens
Lens focal range - 28-100mm (3.6x)
Maximum aperture - f/1.8-4.9
Macro focus range - 5cm
Available lenses 151 -
Focal length multiplier 1.5 2.7
Screen
Screen type Fixed Type Fixed Type
Screen diagonal 3.2 inches 3 inches
Resolution of screen 1,037 thousand dot 1,229 thousand dot
Selfie friendly
Liveview
Touch capability
Screen technology - WhiteMagic TFT LCD
Viewfinder Information
Viewfinder type Optical (pentaprism) None
Viewfinder coverage 100% -
Viewfinder magnification 0.64x -
Features
Slowest shutter speed 30s 30s
Maximum shutter speed 1/8000s 1/2000s
Continuous shooting speed 8.3fps 10.0fps
Shutter priority
Aperture priority
Expose Manually
Exposure compensation Yes Yes
Set WB
Image stabilization
Inbuilt flash
Flash range no built-in flash -
Flash options Auto Flash Discharge, Auto Flash + Red-eye Reduction, 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 (available with dedicated external flash) Auto, On, Off, Slow Sync
External flash
AEB
White balance bracketing
Maximum flash sync 1/180s 1/2000s
Exposure
Multisegment exposure
Average exposure
Spot exposure
Partial exposure
AF area exposure
Center weighted exposure
Video features
Video resolutions 1920 x 1080 (60i, 50i, 30p, 25p, 24p), 1280 x 720 (60p, 50p, 30p, 25p, 24p) 1920 x 1080 (60 fps), 1440 x 1080 (30 fps), 1280 x 720 (30 fps), 640 x 480 (30 fps)
Highest video resolution 1920x1080 1920x1080
Video format MPEG-4, H.264 MPEG-4, AVCHD
Mic jack
Headphone jack
Connectivity
Wireless Optional Eye-Fi Connected
Bluetooth
NFC
HDMI
USB USB 3.0 (5 GBit/sec) USB 2.0 (480 Mbit/sec)
GPS BuiltIn None
Physical
Environmental seal
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 800 grams (1.76 pounds) 240 grams (0.53 pounds)
Dimensions 131 x 100 x 77mm (5.2" x 3.9" x 3.0") 102 x 58 x 36mm (4.0" x 2.3" x 1.4")
DXO scores
DXO All around score 80 66
DXO Color Depth score 23.6 22.6
DXO Dynamic range score 13.6 12.4
DXO Low light score 1106 390
Other
Battery life 720 photographs 330 photographs
Style of battery Battery Pack Battery Pack
Battery model D-LI90 NP-BX1
Self timer Yes ( 2 or 12 seconds) Yes (2 or 10 sec, Portrait 1/2)
Time lapse shooting With downloadable app
Type of storage Dual SD/SDHC/SDXC SD/SDHC/SDXC, Memory Stick Duo/Pro Duo/Pro-HG Duo
Storage slots Two 1
Launch cost $829 $448