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Pentax K-7 vs Sony G3

Portability
60
Imaging
54
Features
69
Overall
60
Pentax K-7 front
 
Sony Cyber-shot DSC-G3 front
Portability
94
Imaging
32
Features
30
Overall
31

Pentax K-7 vs Sony G3 Key Specs

Pentax K-7
(Full Review)
  • 15MP - APS-C Sensor
  • 3" Fixed Display
  • ISO 100 - 2000 (Expand to 6400)
  • Sensor based Image Stabilization
  • 1/8000s Maximum Shutter
  • 1280 x 720 video
  • Pentax KAF2 Mount
  • 750g - 131 x 97 x 73mm
  • Released October 2009
  • Newer Model is Pentax K-5
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
  • Released January 2009
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Pentax K-7 vs Sony G3 Overview

The following is a thorough overview of the Pentax K-7 and Sony G3, one is a Advanced DSLR and the other is a Small Sensor Compact by brands Pentax and Sony. There is a big difference among the image resolutions of the K-7 (15MP) and G3 (10MP) and the K-7 (APS-C) and G3 (1/2.3") posses totally different sensor sizes.

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The K-7 was launched 9 months after the G3 so they are of a similar generation. Both of the cameras have different body design with the Pentax K-7 being a Mid-size SLR camera and the Sony G3 being a Compact camera.

Before getting straight to a more detailed comparison, here is a concise summation of how the K-7 matches up versus the G3 when considering portability, imaging, features and an overall mark.

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Reasons to pick Pentax K-7 over the Sony G3

 K-7 G3 
ReleasedOctober 2009January 2009Newer by 9 months

Reasons to pick Sony G3 over the Pentax K-7

 G3 K-7 
Display dimensions3.5"3"Larger display (+0.5")
Touch display Easily navigate

Common features in the Pentax K-7 and Sony G3

 K-7 G3 
Manually focus More accurate focusing
Display typeFixed Fixed Fixed display
Display resolution921k921kIdentical display resolution
Selfie screen Lacking selfie screen

Pentax K-7 vs Sony G3 Physical Comparison

For those who are looking to travel with your camera frequently, you should factor its weight and proportions. The Pentax K-7 enjoys outer measurements of 131mm x 97mm x 73mm (5.2" x 3.8" x 2.9") and a weight of 750 grams (1.65 lbs) and the Sony G3 has measurements of 97mm x 59mm x 22mm (3.8" x 2.3" x 0.9") having a weight of 185 grams (0.41 lbs).

Compare the Pentax K-7 and Sony G3 in the new Camera and Lens Size Comparison Tool. Camera Size Comparison with Lenses

Always remember, the weight of an Interchangeable Lens Camera will change based on the lens you are employing at the time. Here is a front view dimension comparison of the K-7 compared to the G3.

Pentax K-7 vs Sony G3 size comparison

Using size and weight, the portability rating of the K-7 and G3 is 60 and 94 respectively.

Pentax K-7 vs Sony G3 top view buttons comparison

Pentax K-7 vs Sony G3 Sensor Comparison

Usually, it is very tough to visualise the difference in sensor dimensions merely by seeing specifications. The pic here will provide you a greater sense of the sensor measurements in the K-7 and G3.

To sum up, each of these cameras provide different megapixel count and different sensor dimensions. The K-7 because of its larger sensor will make getting shallow depth of field simpler and the Pentax K-7 will show more detail utilizing its extra 5 Megapixels. Greater resolution will also allow you to crop images more aggressively. The more modern K-7 is going to have an advantage in sensor technology.

Pentax K-7 vs Sony G3 sensor size comparison

Pentax K-7 vs Sony G3 Screen and ViewFinder

Pentax K-7 vs Sony G3 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Pentax K-7 Portrait photography factors
Sony G3 Portrait photography factors
72
you can focus manually
good megapixels (15 megapixels)
sensor size is good (APS-C)
supports face detect autofocus
delivers RAW formats
25
you can focus manually
no manual exposure
external flash not possible
low resolution (10 megapixels)
sensor size is very small (1/2.3")
does not have RAW format
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Street Comparison

Pentax K-7 Street photography info
Sony G3 Street photography info
66
built in image stabilization (Sensor based)
sensor size is good (APS-C)
delivers RAW formats
weather proofing
fixed screen
56
has image stabilization (Optical)
fixed screen
sensor size is very small (1/2.3")
does not have RAW format
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Sports Comparison

Pentax K-7 Sports photography details
Sony G3 Sports photography details
69
max shutter speed is good (1/8,000s)
built in image stabilization (Sensor based)
good megapixels (15MP)
sensor size is good (APS-C)
weather proofing
sensor has phase detect autofocus
very slow continuous shooting (5.0 frames/s)
23
has image stabilization (Optical)
max shutter speed is low (1/1,000 seconds)
slow fps (2.0 frames/s)
no shutter priority
low resolution (10MP)
sensor size is very small (1/2.3")
does not have phase detect auto focus
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Travel Comparison

Pentax K-7 Travel photography details
Sony G3 Travel photography details
64
weather proofing
good megapixels (15MP)
flash built-in
does not feature selfie friendly display
50
built-in flash
lack of Timelapse function
low resolution (10MP)
does not have selfie friendly display
wide angle not fantastic (35mm)
slow maximum aperture (f3.5)
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Landscape Comparison

Pentax K-7 Landscape photography info
Sony G3 Landscape photography info
77
you can focus manually
interchangeable lenses (Pentax KAF2 mount)
screen is a good size (3")
built in image stabilization (Sensor based)
good megapixels (15MP)
sensor size is good (APS-C)
delivers RAW formats
weather proofing
35
you can focus manually
big screen (3.5")
has image stabilization (Optical)
lens is fixed (fixed lens mount)
wide angle not fantastic (35mm)
slow maximum aperture (f3.5)
no manual exposure
low resolution (10 megapixels)
sensor size is very small (1/2.3")
does not have RAW format
lack of Timelapse function
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Vlogging Comparison

Pentax K-7 Vlogging factors
Sony G3 Vlogging factors
25
built in image stabilization (Sensor based)
supports face detect autofocus
does not feature selfie friendly display
video resolution low (1280 x 720 pixels)
missing mic port
27
touchscreen enabled
has image stabilization (Optical)
wide angle not fantastic (35mm)
slow maximum aperture (f3.5)
does not have selfie friendly display
low quality video (640 x 480 resolution)
lack of external microphone port
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Pentax K-7 vs Sony G3 Specifications

Detailed spec comparison table for Pentax K-7 and Sony G3
 Pentax K-7Sony Cyber-shot DSC-G3
General Information
Make Pentax Sony
Model type Pentax K-7 Sony Cyber-shot DSC-G3
Category Advanced DSLR Small Sensor Compact
Released 2009-10-02 2009-01-08
Body design Mid-size SLR Compact
Sensor Information
Powered by Prime II -
Sensor type CMOS CCD
Sensor size APS-C 1/2.3"
Sensor measurements 23.4 x 15.6mm 6.17 x 4.55mm
Sensor surface area 365.0mm² 28.1mm²
Sensor resolution 15MP 10MP
Anti alias filter
Aspect ratio 3:2 4:3, 3:2 and 16:9
Max resolution 4672 x 3104 3648 x 2736
Max native ISO 2000 3200
Max enhanced ISO 6400 -
Lowest native ISO 100 80
RAW pictures
Autofocusing
Focus manually
Autofocus touch
Continuous autofocus
Single autofocus
Tracking autofocus
Autofocus selectice
Autofocus center weighted
Autofocus multi area
Live view autofocus
Face detect autofocus
Contract detect autofocus
Phase detect autofocus
Total focus points 11 9
Lens
Lens mount type Pentax KAF2 fixed lens
Lens zoom range - 35-140mm (4.0x)
Largest aperture - f/3.5-10.0
Number of lenses 151 -
Focal length multiplier 1.5 5.8
Screen
Range of display Fixed Type Fixed Type
Display size 3 inch 3.5 inch
Display resolution 921k dot 921k dot
Selfie friendly
Liveview
Touch friendly
Display tech TFT color LCD with AR coating -
Viewfinder Information
Viewfinder Optical (pentaprism) None
Viewfinder coverage 100 percent -
Viewfinder magnification 0.61x -
Features
Min shutter speed 30 secs 1 secs
Max shutter speed 1/8000 secs 1/1000 secs
Continuous shutter speed 5.0 frames/s 2.0 frames/s
Shutter priority
Aperture priority
Manual exposure
Exposure compensation Yes -
Custom white balance
Image stabilization
Inbuilt flash
Flash distance 13.00 m 4.30 m (Auto ISO)
Flash modes Auto, On, Off, Red-eye, Slow Sync, Rear Curtain, Wireless Auto, On, Off, Red-Eye reduction, Slow Sync
Hot shoe
Auto exposure bracketing
White balance bracketing
Max flash sync 1/180 secs -
Exposure
Multisegment
Average
Spot
Partial
AF area
Center weighted
Video features
Video resolutions 1280 x 720 (30 fps), 1536 x 1024 (30 fps), 640 x 480 (30 fps), 320 x 240 (30 fps) 640 x 480 (30, 15 fps), 320 x 240 (30, 15 fps)
Max video resolution 1280x720 640x480
Video file format Motion JPEG Motion JPEG
Microphone jack
Headphone jack
Connectivity
Wireless None None
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS None None
Physical
Environmental seal
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 750g (1.65 lbs) 185g (0.41 lbs)
Physical dimensions 131 x 97 x 73mm (5.2" x 3.8" x 2.9") 97 x 59 x 22mm (3.8" x 2.3" x 0.9")
DXO scores
DXO Overall rating 61 not tested
DXO Color Depth rating 22.6 not tested
DXO Dynamic range rating 10.6 not tested
DXO Low light rating 536 not tested
Other
Battery life 980 shots -
Type of battery Battery Pack -
Battery ID D-LI90 -
Self timer Yes (2 or 10 sec) Yes (2 or 10 sec)
Time lapse feature
Type of storage SD/SDHC/MMC Memory Stick Duo/Pro Duo, Internal
Storage slots 1 1
Retail cost $599 $200