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Pentax K-5 vs Sony A55

Portability
60
Imaging
56
Features
82
Overall
66
Pentax K-5 front
 
Sony SLT-A55 front
Portability
67
Imaging
56
Features
80
Overall
65

Pentax K-5 vs Sony A55 Key Specs

Pentax K-5
(Full Review)
  • 16MP - APS-C Sensor
  • 3" Fixed Display
  • ISO 80 - 12800 (Boost to 51200)
  • Sensor based Image Stabilization
  • 1/8000s Maximum Shutter
  • 1920 x 1080 video
  • Pentax KAF2 Mount
  • 740g - 131 x 97 x 73mm
  • Introduced December 2010
  • Succeeded the Pentax K-7
  • Refreshed by Pentax K-5 IIs
Sony A55
(Full Review)
  • 16MP - APS-C Sensor
  • 3" Fully Articulated Display
  • ISO 100 - 12800 (Raise to 25600)
  • Sensor based Image Stabilization
  • 1920 x 1080 video
  • Sony/Minolta Alpha Mount
  • 500g - 124 x 92 x 85mm
  • Introduced August 2010
  • Successor is Sony A57
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Pentax K-5 vs Sony A55 Overview

Following is a extensive assessment of the Pentax K-5 vs Sony A55, former is a Advanced DSLR while the other is a Entry-Level DSLR by brands Pentax and Sony. The image resolution of the K-5 (16MP) and the A55 (16MP) is fairly similar and both cameras have the identical sensor measurements (APS-C).

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The K-5 was released 4 months after the A55 so they are of a similar age. Both of the cameras feature different body design with the Pentax K-5 being a Mid-size SLR camera and the Sony A55 being a Compact SLR camera.

Before going into a in depth comparison, here is a brief view of how the K-5 grades against the A55 when considering portability, imaging, features and an overall score.

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Reasons to pick Pentax K-5 over the Sony A55

 K-5 A55 

Reasons to pick Sony A55 over the Pentax K-5

 A55 K-5 
Display typeFully ArticulatedFixed Fully Articulating display
Selfie screen Take selfies

Common features in the Pentax K-5 and Sony A55

 K-5 A55 
IntroducedDecember 2010August 2010Similar age
Manual focus More accurate focusing
Display size3"3"Same display measurements
Display resolution921k921kExact same display resolution
Touch display Neither offers Touch display

Pentax K-5 vs Sony A55 Physical Comparison

When you are intending to carry around your camera, you have to consider its weight and proportions. The Pentax K-5 offers outside measurements of 131mm x 97mm x 73mm (5.2" x 3.8" x 2.9") having a weight of 740 grams (1.63 lbs) while the Sony A55 has measurements of 124mm x 92mm x 85mm (4.9" x 3.6" x 3.3") and a weight of 500 grams (1.10 lbs).

Check out the Pentax K-5 vs Sony A55 in our newest Camera plus Lens Size Comparison Tool. Camera Size Comparison with Lenses

Don't forget, the weight of an ILC will differ dependant on the lens you are working with at the time. Underneath is a front view proportions comparison of the K-5 compared to the A55.

Pentax K-5 vs Sony A55 size comparison

Considering size and weight, the portability rating of the K-5 and A55 is 60 and 67 respectively.

Pentax K-5 vs Sony A55 top view buttons comparison

Pentax K-5 vs Sony A55 Sensor Comparison

Often, it can be hard to visualize the contrast between sensor sizes just by reviewing specifications. The image below may give you a greater sense of the sensor sizing in the K-5 and A55.

Plainly, the two cameras come with the identical sensor size and the exact same MP so you can expect similar quality of photographs though you should consider the age of the products into consideration.

Pentax K-5 vs Sony A55 sensor size comparison

Pentax K-5 vs Sony A55 Screen and ViewFinder

Pentax K-5 vs Sony A55 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Pentax K-5 Portrait photography information
Sony A55 Portrait photography information
73
you can focus manually
megapixel count decent (16MP)
good sensor size (APS-C)
provides face detect focus
exports RAW files
73
has manual focus
megapixel count good (16MP)
sensor size is good (APS-C)
provides face detection focus
saves RAW formats
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Street Comparison

Pentax K-5 Street photography details
Sony A55 Street photography details
66
built in image stabilization (Sensor based)
good sensor size (APS-C)
exports RAW files
environment proofing
screen does not articulate
77
screen articulates
built in image stabilization (Sensor based)
sensor size is good (APS-C)
saves RAW formats
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Sports Comparison

Sports photography with Pentax K-5
Sports photography with Sony A55
78
max shutter speed is good (1/8,000 seconds)
built in image stabilization (Sensor based)
megapixel count decent (16 megapixels)
good sensor size (APS-C)
provides tracking focus
environment proofing
comes with phase detect auto focus
68
built in image stabilization (Sensor based)
megapixel count good (16 megapixels)
sensor size is good (APS-C)
comes with phase detect auto focus
bad battery (380 per charge)
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Travel Comparison

Pentax K-5 Travel photography information
Sony A55 Travel photography information
65
environment proofing
megapixel count decent (16MP)
has built in flash
doesn't posses selfie friendly screen
62
megapixel count good (16 megapixels)
has built in flash
display is selfie friendly
doesn't have Time Lapse recording
bad battery (380 shots)
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Landscape Comparison

Pentax K-5 Landscape photography details
Sony A55 Landscape photography details
78
you can focus manually
swap lenses (Pentax KAF2 mount)
screen size is good (3 inches)
built in image stabilization (Sensor based)
megapixel count decent (16 megapixels)
good sensor size (APS-C)
exports RAW files
environment proofing
67
has manual focus
interchangeable lenses (Sony/Minolta Alpha mount)
good sized screen (3 inches)
built in image stabilization (Sensor based)
megapixel count good (16MP)
sensor size is good (APS-C)
saves RAW formats
bad battery (380 per charge)
doesn't have Time Lapse recording
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Vlogging Comparison

Vlogging with Pentax K-5
Vlogging with Sony A55
33
built in image stabilization (Sensor based)
provides face detect focus
high res video (1920 x 1080 pixels)
does have mic support
doesn't posses selfie friendly screen
78
display is selfie friendly
built in image stabilization (Sensor based)
provides face detection focus
great video quality (1920 x 1080 pxls)
does have external mic support
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Pentax K-5 vs Sony A55 Specifications

Detailed spec comparison table for Pentax K-5 and Sony A55
 Pentax K-5Sony SLT-A55
General Information
Brand Name Pentax Sony
Model type Pentax K-5 Sony SLT-A55
Category Advanced DSLR Entry-Level DSLR
Introduced 2010-12-18 2010-08-24
Physical type Mid-size SLR Compact SLR
Sensor Information
Powered by Prime II Bionz
Sensor type CMOS CMOS
Sensor size APS-C APS-C
Sensor dimensions 23.7 x 15.7mm 23.5 x 15.6mm
Sensor area 372.1mm² 366.6mm²
Sensor resolution 16MP 16MP
Anti alias filter
Aspect ratio 3:2 3:2 and 16:9
Maximum resolution 4928 x 3264 4912 x 3264
Maximum native ISO 12800 12800
Maximum boosted ISO 51200 25600
Lowest native ISO 80 100
RAW photos
Autofocusing
Manual focusing
Autofocus touch
Continuous autofocus
Autofocus single
Autofocus tracking
Autofocus selectice
Autofocus center weighted
Autofocus multi area
Live view autofocus
Face detect autofocus
Contract detect autofocus
Phase detect autofocus
Total focus points 11 15
Cross type focus points 9 3
Lens
Lens mount type Pentax KAF2 Sony/Minolta Alpha
Number of lenses 151 143
Focal length multiplier 1.5 1.5
Screen
Type of display Fixed Type Fully Articulated
Display diagonal 3 inches 3 inches
Resolution of display 921 thousand dots 921 thousand dots
Selfie friendly
Liveview
Touch operation
Display technology TFT LCD monitor -
Viewfinder Information
Viewfinder type Optical (pentaprism) Electronic
Viewfinder resolution - 1,150 thousand dots
Viewfinder coverage 100% 100%
Viewfinder magnification 0.61x 0.73x
Features
Slowest shutter speed 30 secs 30 secs
Maximum shutter speed 1/8000 secs 1/4000 secs
Continuous shooting rate 7.0 frames per second 10.0 frames per second
Shutter priority
Aperture priority
Manually set exposure
Exposure compensation Yes Yes
Set white balance
Image stabilization
Built-in flash
Flash distance 13.00 m (at ISO 100) 10.00 m (@ ISO 100)
Flash settings Auto, On, Off, Red-eye, Slow sync, High speed, Rear curtain and Wireless Auto, On, Off, Red-Eye, Slow Sync, High Speed Sync, Rear Curtain, Fill-in, Wireless
Hot shoe
Auto exposure bracketing
White balance bracketing
Maximum flash synchronize 1/180 secs 1/160 secs
Exposure
Multisegment exposure
Average exposure
Spot exposure
Partial exposure
AF area exposure
Center weighted exposure
Video features
Supported video resolutions 1920 x 1080 (25 fps), 1280 x 720 (25, 30 fps), 640 x 424 (25, 30 fps) 1920 x 1080 (60, 29.97 fps), 1440 x 1080 (30fps), 640 x 424 (29.97 fps)
Maximum video resolution 1920x1080 1920x1080
Video format Motion JPEG MPEG-4, AVCHD, H.264
Mic support
Headphone support
Connectivity
Wireless None Eye-Fi Connected
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS Optional BuiltIn
Physical
Environmental sealing
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 740 gr (1.63 pounds) 500 gr (1.10 pounds)
Physical dimensions 131 x 97 x 73mm (5.2" x 3.8" x 2.9") 124 x 92 x 85mm (4.9" x 3.6" x 3.3")
DXO scores
DXO All around rating 82 73
DXO Color Depth rating 23.7 23.0
DXO Dynamic range rating 14.1 12.4
DXO Low light rating 1162 816
Other
Battery life 980 shots 380 shots
Battery style Battery Pack Battery Pack
Battery ID D-LI90 NP-FW50
Self timer Yes ( 2 or 12 seconds) Yes (2 or 10 sec)
Time lapse shooting
Storage type SD/SDHC/SDXC SD/SDHC/SDXC/Memory Stick Pro Duo/ Pro-HG Duo
Card slots One One
Retail cost $800 $800