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Pentax K-3 vs Sony G3

Portability
59
Imaging
65
Features
85
Overall
73
Pentax K-3 front
 
Sony Cyber-shot DSC-G3 front
Portability
94
Imaging
33
Features
30
Overall
31

Pentax K-3 vs Sony G3 Key Specs

Pentax K-3
(Full Review)
  • 24MP - APS-C Sensor
  • 3.2" Fixed Screen
  • ISO 100 - 51200
  • Sensor based Image Stabilization
  • No Anti-Alias Filter
  • 1/8000s Max Shutter
  • 1920 x 1080 video
  • Pentax KAF2 Mount
  • 800g - 131 x 100 x 77mm
  • Announced April 2014
  • Updated by Pentax K-3 II
Sony G3
(Full Review)
  • 10MP - 1/2.3" Sensor
  • 3.5" Fixed Display
  • ISO 80 - 3200
  • Optical Image Stabilization
  • 640 x 480 video
  • 35-140mm (F3.5-10.0) lens
  • 185g - 97 x 59 x 22mm
  • Launched January 2009
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Pentax K-3 vs Sony G3 Overview

The following is a detailed assessment of the Pentax K-3 and Sony G3, former is a Advanced DSLR while the other is a Small Sensor Compact by brands Pentax and Sony. There exists a considerable gap among the sensor resolutions of the K-3 (24MP) and G3 (10MP) and the K-3 (APS-C) and G3 (1/2.3") enjoy different sensor size.

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The K-3 was launched 5 years after the G3 which is a fairly large difference as far as camera technology is concerned. Both cameras come with different body type with the Pentax K-3 being a Mid-size SLR camera and the Sony G3 being a Compact camera.

Before going in to a detailed comparison, below is a quick summation of how the K-3 matches up versus the G3 with regard to portability, imaging, features and an overall mark.

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Reasons to pick Pentax K-3 over the Sony G3

 K-3 G3 
LaunchedApril 2014January 2009Newer by 64 months
Display resolution1037k921kCrisper display (+116k dot)

Reasons to pick Sony G3 over the Pentax K-3

 G3 K-3 
Display dimension3.5"3.2"Larger display (+0.3")
Touch friendly display Easily navigate

Common features in the Pentax K-3 and Sony G3

 K-3 G3 
Manual focus Dial accurate focusing
Display typeFixed Fixed Fixed display
Selfie screen Neither comes with selfie screen

Pentax K-3 vs Sony G3 Physical Comparison

In case you're intending to travel with your camera often, you're going to have to think about its weight and size. The Pentax K-3 comes with outside dimensions of 131mm x 100mm x 77mm (5.2" x 3.9" x 3.0") along with a weight of 800 grams (1.76 lbs) whilst the Sony G3 has specifications of 97mm x 59mm x 22mm (3.8" x 2.3" x 0.9") having a weight of 185 grams (0.41 lbs).

Contrast the Pentax K-3 and Sony G3 in our newest Camera & Lens Size Comparison Tool. Camera Size Comparison with Lenses

Do not forget, the weight of an ILC will vary dependant on the lens you use at that moment. Following is the front view size comparison of the K-3 vs the G3.

Pentax K-3 vs Sony G3 size comparison

Factoring in dimensions and weight, the portability rating of the K-3 and G3 is 59 and 94 respectively.

Pentax K-3 vs Sony G3 top view buttons comparison

Pentax K-3 vs Sony G3 Sensor Comparison

More often than not, it is very hard to visualize the contrast in sensor dimensions just by seeing specs. The picture below might offer you a clearer sense of the sensor sizes in the K-3 and G3.

As you can plainly see, the two cameras posses different megapixel count and different sensor dimensions. The K-3 because of its larger sensor is going to make getting shallow depth of field easier and the Pentax K-3 will produce extra detail utilizing its extra 14 Megapixels. Greater resolution will also enable you to crop pics somewhat more aggressively. The more recent K-3 provides an edge when it comes to sensor technology.

Pentax K-3 vs Sony G3 sensor size comparison

Pentax K-3 vs Sony G3 Screen and ViewFinder

Pentax K-3 vs Sony G3 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Pentax K-3 Portrait photography advice
Sony G3 Portrait photography advice
79
has manual focus
resolution is good (24MP)
sensor size is good (APS-C)
features face detection autofocus
delivers RAW formats
26
manual focus
manual mode not available
can't use external flash
low megapixels (10 megapixels)
tiny sensor (1/2.3")
lack of RAW files
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Street Comparison

Pentax K-3 Street photography information
Sony G3 Street photography information
69
has image stabilization (Sensor based)
sensor size is good (APS-C)
delivers RAW formats
environment proof
very good high ISO (51,200)
no moving screen
56
image stabilization (Optical)
fixed screen
tiny sensor (1/2.3")
lack of RAW files
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Sports Comparison

Sports photography with Pentax K-3
Sports photography with Sony G3
76
high shutter speed (1/8,000s)
has image stabilization (Sensor based)
resolution is good (24 megapixels)
sensor size is good (APS-C)
features tracking autofocus
environment proof
sensor has phase detect autofocus
low battery life (560 CIPA)
23
image stabilization (Optical)
max shutter speed is low (1/1,000 seconds)
painfully slow continuous shooting (2.0 frames per second)
no shutter priority
low megapixels (10 megapixels)
tiny sensor (1/2.3")
lack of phase detect AF
Photography Glossary

Travel Comparison

Travel photography with Pentax K-3
Travel photography with Sony G3
60
environment proof
resolution is good (24MP)
flash built-in
low battery life (560 shots)
does not feature selfie friendly display
50
built-in flash
no Timelapse recording
low megapixels (10MP)
screen isn't selfie friendly
wide angle not great (35mm)
slow max aperture (f3.5)
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Landscape Comparison

Pentax K-3 as a Landscape photography camera
Sony G3 as a Landscape photography camera
77
has manual focus
interchangeable lenses (Pentax KAF2 mount)
screen size is good (3.2 inches)
has image stabilization (Sensor based)
resolution is good (24 megapixels)
sensor size is good (APS-C)
doesnt have anti-alias filter
very good high ISO (51,200)
delivers RAW formats
environment proof
has double storage slots
low battery life (560 shots)
36
manual focus
big screen (3.5 inch)
image stabilization (Optical)
fixed lens (fixed lens mount)
wide angle not great (35mm)
slow max aperture (f3.5)
manual mode not available
low megapixels (10 megapixels)
tiny sensor (1/2.3")
lack of RAW files
no Timelapse recording
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Vlogging Comparison

Pentax K-3 as a Vlogging camera
Sony G3 as a Vlogging camera
34
has image stabilization (Sensor based)
features face detection autofocus
high quality video (1920 x 1080 pixels)
includes external microphone port
does not feature selfie friendly display
27
touchscreen
image stabilization (Optical)
wide angle not great (35mm)
slow max aperture (f3.5)
screen isn't selfie friendly
low quality video (640 x 480 resolution)
no microphone support
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Pentax K-3 vs Sony G3 Specifications

Detailed spec comparison table for Pentax K-3 and Sony G3
 Pentax K-3Sony Cyber-shot DSC-G3
General Information
Make Pentax Sony
Model Pentax K-3 Sony Cyber-shot DSC-G3
Class Advanced DSLR Small Sensor Compact
Announced 2014-04-10 2009-01-08
Physical type Mid-size SLR Compact
Sensor Information
Processor Chip Prime III -
Sensor type CMOS CCD
Sensor size APS-C 1/2.3"
Sensor measurements 23.5 x 15.6mm 6.17 x 4.55mm
Sensor area 366.6mm² 28.1mm²
Sensor resolution 24MP 10MP
Anti aliasing filter
Aspect ratio 3:2 4:3, 3:2 and 16:9
Peak resolution 6016 x 4000 3648 x 2736
Highest native ISO 51200 3200
Lowest native ISO 100 80
RAW files
Autofocusing
Manual focus
Touch focus
AF continuous
Single AF
Tracking AF
Selective AF
AF center weighted
Multi area AF
AF live view
Face detection focusing
Contract detection focusing
Phase detection focusing
Number of focus points 27 9
Cross focus points 25 -
Lens
Lens mount Pentax KAF2 fixed lens
Lens focal range - 35-140mm (4.0x)
Largest aperture - f/3.5-10.0
Total lenses 151 -
Crop factor 1.5 5.8
Screen
Type of screen Fixed Type Fixed Type
Screen size 3.2 inches 3.5 inches
Resolution of screen 1,037k dots 921k dots
Selfie friendly
Liveview
Touch function
Screen tech TFT LCD monitor -
Viewfinder Information
Viewfinder Optical (pentaprism) None
Viewfinder coverage 100 percent -
Viewfinder magnification 0.64x -
Features
Minimum shutter speed 30 secs 1 secs
Fastest shutter speed 1/8000 secs 1/1000 secs
Continuous shutter rate 8.0 frames per sec 2.0 frames per sec
Shutter priority
Aperture priority
Manually set exposure
Exposure compensation Yes -
Custom WB
Image stabilization
Integrated flash
Flash range 13.00 m (at ISO 100) 4.30 m (Auto ISO)
Flash settings Auto, on, off, red-eye, slow sync, slow sync + red-eye, trailing curtain sync, high speed, wireless, manual Auto, On, Off, Red-Eye reduction, Slow Sync
Hot shoe
Auto exposure bracketing
WB bracketing
Fastest flash synchronize 1/180 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) 640 x 480 (30, 15 fps), 320 x 240 (30, 15 fps)
Highest video resolution 1920x1080 640x480
Video format MPEG-4, H.264 Motion JPEG
Microphone support
Headphone support
Connectivity
Wireless None None
Bluetooth
NFC
HDMI
USB USB 3.0 (5 GBit/sec) USB 2.0 (480 Mbit/sec)
GPS Optional None
Physical
Environment sealing
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 800 gr (1.76 lb) 185 gr (0.41 lb)
Dimensions 131 x 100 x 77mm (5.2" x 3.9" x 3.0") 97 x 59 x 22mm (3.8" x 2.3" x 0.9")
DXO scores
DXO Overall score 80 not tested
DXO Color Depth score 23.7 not tested
DXO Dynamic range score 13.4 not tested
DXO Low light score 1216 not tested
Other
Battery life 560 pictures -
Style of battery Battery Pack -
Battery model D-LI90 -
Self timer Yes ( 2 or 12 seconds) Yes (2 or 10 sec)
Time lapse shooting
Storage type Dual SD/SDHC/SDXC Memory Stick Duo/Pro Duo, Internal
Card slots 2 Single
Launch price $639 $200