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Pentax K-7 vs Sony A77

Portability
60
Imaging
55
Features
69
Overall
60
Pentax K-7 front
 
Sony SLT-A77 front
Portability
59
Imaging
64
Features
83
Overall
71

Pentax K-7 vs Sony A77 Key Specs

Pentax K-7
(Full Review)
  • 15MP - APS-C Sensor
  • 3" Fixed Display
  • ISO 100 - 2000 (Increase to 6400)
  • Sensor based Image Stabilization
  • 1/8000s Maximum Shutter
  • 1280 x 720 video
  • Pentax KAF2 Mount
  • 750g - 131 x 97 x 73mm
  • Introduced October 2009
  • Newer Model is Pentax K-5
Sony A77
(Full Review)
  • 24MP - APS-C Sensor
  • 3" Fully Articulated Screen
  • ISO 50 - 16000 (Raise to 25600)
  • Sensor based Image Stabilization
  • 1/8000s Maximum Shutter
  • 1920 x 1080 video
  • Sony/Minolta Alpha Mount
  • 732g - 143 x 104 x 81mm
  • Launched October 2011
  • Previous Model is Sony A700
  • Renewed by Sony A77 II
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Pentax K-7 vs Sony A77 Overview

On this page, we will be matching up the Pentax K-7 and Sony A77, both Advanced DSLR digital cameras by companies Pentax and Sony. There exists a considerable gap between the sensor resolutions of the K-7 (15MP) and A77 (24MP) but both cameras have the same sensor measurements (APS-C).

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The K-7 was revealed 3 years earlier than the A77 which is quite a large difference as far as technology is concerned. Both cameras have the same body design (Mid-size SLR).

Before delving into a detailed comparison, here is a concise summary of how the K-7 scores against the A77 for portability, imaging, features and an overall mark.

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Reasons to pick Pentax K-7 over the Sony A77

 K-7 A77 

Reasons to pick Sony A77 over the Pentax K-7

 A77 K-7 
LaunchedOctober 2011October 2009Newer by 25 months
Screen typeFully ArticulatedFixed Fully Articulating screen
Selfie screen Take selfies

Common features in the Pentax K-7 and Sony A77

 K-7 A77 
Manual focus Dial accurate focus
Screen dimensions3"3"Equal screen measurements
Screen resolution921k921kEqual screen resolution
Touch screen Missing Touch screen

Pentax K-7 vs Sony A77 Physical Comparison

In case you're planning to travel with your camera, you will have to factor its weight and proportions. The Pentax K-7 comes with outside dimensions of 131mm x 97mm x 73mm (5.2" x 3.8" x 2.9") having a weight of 750 grams (1.65 lbs) while the Sony A77 has measurements of 143mm x 104mm x 81mm (5.6" x 4.1" x 3.2") having a weight of 732 grams (1.61 lbs).

See the Pentax K-7 and Sony A77 in our completely new Camera plus Lens Size Comparison Tool. Camera Size Comparison with Lenses

Bear in mind, the weight of an ILC will vary based on the lens you are using at that moment. The following is a front view dimensions comparison of the K-7 compared to the A77.

Pentax K-7 vs Sony A77 size comparison

Factoring in dimensions and weight, the portability score of the K-7 and A77 is 60 and 59 respectively.

Pentax K-7 vs Sony A77 top view buttons comparison

Pentax K-7 vs Sony A77 Sensor Comparison

Typically, it can be hard to envision the contrast between sensor dimensions just by reviewing specifications. The picture here will help offer you a better sense of the sensor dimensions in the K-7 and A77.

Plainly, each of these cameras provide the same sensor dimensions albeit not the same resolution. You can expect the Sony A77 to deliver more detail because of its extra 9MP. Higher resolution will help you crop pictures more aggressively. The more aged K-7 is going to be behind in sensor tech.

Pentax K-7 vs Sony A77 sensor size comparison

Pentax K-7 vs Sony A77 Screen and ViewFinder

Pentax K-7 vs Sony A77 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Portrait photography with Pentax K-7
Portrait photography with Sony A77
73
focusing manually
MP count good (15MP)
nice sensor size (APS-C)
features face detection focusing
exports RAW files
78
you can focus manually
MP count good (24MP)
good sensor size (APS-C)
includes face detection focusing
saves RAW formats
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Street Comparison

Pentax K-7 Street photography advice
Sony A77 Street photography advice
66
image stabilization (Sensor based)
nice sensor size (APS-C)
exports RAW files
environment proofing
fixed screen
75
screen articulates fully
built in image stabilization (Sensor based)
good sensor size (APS-C)
saves RAW formats
environment sealing
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Sports Comparison

Pentax K-7 Sports photography factors
Sony A77 Sports photography factors
70
max shutter speed is good (1/8,000 seconds)
image stabilization (Sensor based)
MP count good (15MP)
nice sensor size (APS-C)
environment proofing
supports phase detect AF
max frames per second low (5.0 frames/s)
74
max shutter speed is good (1/8,000 seconds)
built in image stabilization (Sensor based)
MP count good (24 megapixels)
good sensor size (APS-C)
environment sealing
comes with phase detect AF
low battery (470 CIPA)
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Travel Comparison

Pentax K-7 Travel photography information
Sony A77 Travel photography information
65
environment proofing
MP count good (15 megapixels)
has built in flash
doesn't posses selfie friendly display
63
environment sealing
MP count good (24 megapixels)
built-in flash
display is selfie friendly
lack of Time Lapse mode
low battery (470 per charge)
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Landscape Comparison

Pentax K-7 Landscape photography factors
Sony A77 Landscape photography factors
78
focusing manually
interchangeable lenses (Pentax KAF2 mount)
screen size is good (3 inches)
image stabilization (Sensor based)
MP count good (15MP)
nice sensor size (APS-C)
exports RAW files
environment proofing
71
you can focus manually
interchangeable lenses (Sony/Minolta Alpha mount)
screen size is good (3 inches)
built in image stabilization (Sensor based)
MP count good (24MP)
good sensor size (APS-C)
saves RAW formats
environment sealing
low battery (470 shots)
lack of Time Lapse mode
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Vlogging Comparison

Pentax K-7 as a Vlogging camera
Sony A77 as a Vlogging camera
25
image stabilization (Sensor based)
features face detection focusing
doesn't posses selfie friendly display
video res low (1280 x 720 pxls)
lack of external mic socket
76
display is selfie friendly
built in image stabilization (Sensor based)
includes face detection focusing
high quality video (1920 x 1080 pxls)
does have external mic socket
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Pentax K-7 vs Sony A77 Specifications

Detailed spec comparison table for Pentax K-7 and Sony A77
 Pentax K-7Sony SLT-A77
General Information
Brand Pentax Sony
Model type Pentax K-7 Sony SLT-A77
Type Advanced DSLR Advanced DSLR
Introduced 2009-10-02 2011-10-25
Physical type Mid-size SLR Mid-size SLR
Sensor Information
Chip Prime II Bionz
Sensor type CMOS CMOS
Sensor size APS-C APS-C
Sensor dimensions 23.4 x 15.6mm 23.5 x 15.6mm
Sensor area 365.0mm² 366.6mm²
Sensor resolution 15MP 24MP
Anti alias filter
Aspect ratio 3:2 3:2 and 16:9
Maximum resolution 4672 x 3104 6000 x 4000
Maximum native ISO 2000 16000
Maximum boosted ISO 6400 25600
Minimum native ISO 100 50
RAW photos
Autofocusing
Manual focusing
AF touch
Continuous AF
AF single
AF tracking
Selective AF
AF center weighted
AF multi area
AF live view
Face detect focusing
Contract detect focusing
Phase detect focusing
Total focus points 11 19
Cross type focus points - 11
Lens
Lens support Pentax KAF2 Sony/Minolta Alpha
Amount of lenses 151 143
Focal length multiplier 1.5 1.5
Screen
Type of display Fixed Type Fully Articulated
Display sizing 3 inch 3 inch
Resolution of display 921 thousand dots 921 thousand dots
Selfie friendly
Liveview
Touch capability
Display technology TFT color LCD with AR coating -
Viewfinder Information
Viewfinder type Optical (pentaprism) Electronic
Viewfinder resolution - 2,359 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 1/8000 secs
Continuous shooting rate 5.0 frames/s 12.0 frames/s
Shutter priority
Aperture priority
Expose Manually
Exposure compensation Yes Yes
Change WB
Image stabilization
Inbuilt flash
Flash distance 13.00 m 12.00 m
Flash settings Auto, On, Off, Red-eye, Slow Sync, Rear Curtain, Wireless Auto, On, Off, Red-Eye, Slow Sync, High Speed Sync, Rear Curtain, Fill-in, Wireless
Hot shoe
AEB
White balance bracketing
Maximum flash synchronize 1/180 secs 1/250 secs
Exposure
Multisegment metering
Average metering
Spot metering
Partial metering
AF area metering
Center weighted metering
Video features
Supported video resolutions 1280 x 720 (30 fps), 1536 x 1024 (30 fps), 640 x 480 (30 fps), 320 x 240 (30 fps) 1920 x 1080 (60, 24 fps), 1440 x 1080 (30fps), 640 x 424 (29.97 fps)
Maximum video resolution 1280x720 1920x1080
Video format Motion JPEG MPEG-4, AVCHD, H.264
Mic port
Headphone port
Connectivity
Wireless None Eye-Fi Connected
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS None BuiltIn
Physical
Environmental sealing
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 750 gr (1.65 lbs) 732 gr (1.61 lbs)
Physical dimensions 131 x 97 x 73mm (5.2" x 3.8" x 2.9") 143 x 104 x 81mm (5.6" x 4.1" x 3.2")
DXO scores
DXO All around rating 61 78
DXO Color Depth rating 22.6 24.0
DXO Dynamic range rating 10.6 13.2
DXO Low light rating 536 801
Other
Battery life 980 pictures 470 pictures
Battery type Battery Pack Battery Pack
Battery ID D-LI90 NP-FM500H
Self timer Yes (2 or 10 sec) Yes (2 or 10 sec)
Time lapse feature
Storage type SD/SDHC/MMC SD/SDHC/SDXC/Memory Stick Pro Duo/ Pro-HG Duo
Card slots Single Single
Cost at launch $599 $900