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Pentax I-10 vs Sony A77

Portability
93
Imaging
35
Features
24
Overall
30
Pentax Optio I-10 front
 
Sony SLT-A77 front
Portability
59
Imaging
64
Features
83
Overall
71

Pentax I-10 vs Sony A77 Key Specs

Pentax I-10
(Full Review)
  • 12MP - 1/2.3" Sensor
  • 2.7" Fixed Screen
  • ISO 80 - 6400
  • Sensor-shift Image Stabilization
  • 1280 x 720 video
  • 28-140mm (F3.5-5.9) lens
  • 153g - 101 x 65 x 28mm
  • Announced January 2010
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
  • Introduced October 2011
  • Previous Model is Sony A700
  • New Model is Sony A77 II
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Pentax I-10 vs Sony A77 Overview

The following is a detailed assessment of the Pentax I-10 and Sony A77, former is a Small Sensor Compact while the latter is a Advanced DSLR by competitors Pentax and Sony. There is a sizable difference among the image resolutions of the I-10 (12MP) and A77 (24MP) and the I-10 (1/2.3") and A77 (APS-C) possess different sensor dimensions.

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The I-10 was introduced 21 months before the A77 which makes the cameras a generation away from each other. The two cameras come with different body type with the Pentax I-10 being a Compact camera and the Sony A77 being a Mid-size SLR camera.

Before delving in to a full comparison, below is a concise summary of how the I-10 scores vs the A77 in the way of portability, imaging, features and an overall mark.

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Reasons to pick Pentax I-10 over the Sony A77

 I-10 A77 

Reasons to pick Sony A77 over the Pentax I-10

 A77 I-10 
IntroducedOctober 2011January 2010Newer by 21 months
Screen typeFully ArticulatedFixed Fully Articulating screen
Screen dimension3"2.7"Bigger screen (+0.3")
Screen resolution921k230kClearer screen (+691k dot)
Selfie screen Easy selfies

Common features in the Pentax I-10 and Sony A77

 I-10 A77 
Manually focus Very precise focus
Touch screen Lack of Touch screen

Pentax I-10 vs Sony A77 Physical Comparison

If you are looking to travel with your camera frequently, you should factor in its weight and size. The Pentax I-10 has outer measurements of 101mm x 65mm x 28mm (4.0" x 2.6" x 1.1") with a weight of 153 grams (0.34 lbs) and the Sony A77 has specifications of 143mm x 104mm x 81mm (5.6" x 4.1" x 3.2") with a weight of 732 grams (1.61 lbs).

Check out the Pentax I-10 and Sony A77 in our brand new Camera & Lens Size Comparison Tool. Camera Size Comparison with Lenses

Bear in mind, the weight of an ILC will vary depending on the lens you have at the time. Below is the front view sizing comparison of the I-10 versus the A77.

Pentax I-10 vs Sony A77 size comparison

Taking into account size and weight, the portability grade of the I-10 and A77 is 93 and 59 respectively.

Pentax I-10 vs Sony A77 top view buttons comparison

Pentax I-10 vs Sony A77 Sensor Comparison

Oftentimes, it is hard to imagine the contrast in sensor dimensions just by seeing technical specs. The image below should give you a more clear sense of the sensor sizing in the I-10 and A77.

As you have seen, the two cameras posses different megapixels and different sensor dimensions. The I-10 with its smaller sensor is going to make achieving shallower depth of field harder and the Sony A77 will provide extra detail using its extra 12MP. Higher resolution will allow you to crop shots somewhat more aggressively. The more aged I-10 will be disadvantaged with regard to sensor innovation.

Pentax I-10 vs Sony A77 sensor size comparison

Pentax I-10 vs Sony A77 Screen and ViewFinder

Pentax I-10 vs Sony A77 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Pentax I-10 Portrait photography factors
Sony A77 Portrait photography factors
27
focusing manually
manual mode not available
cannot use external flash
low megapixels (12 megapixels)
very small sensor size (1/2.3")
has no RAW files
78
has manual focus
MP count decent (24MP)
sensor size is decent (APS-C)
includes face detection focus
supports RAW formats
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Street Comparison

Pentax I-10 Street photography features
Sony A77 Street photography features
56
has image stabilization (Sensor-shift)
no articulating screen
very small sensor size (1/2.3")
has no RAW files
75
fully articulated screen
image stabilization (Sensor based)
sensor size is decent (APS-C)
supports RAW formats
weather sealing
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Sports Comparison

Pentax I-10 Sports photography advice
Sony A77 Sports photography advice
31
has image stabilization (Sensor-shift)
features tracking autofocus
max fps very slow (1.0 frames/s)
lack of shutter priority mode
low megapixels (12 megapixels)
very small sensor size (1/2.3")
has no phase detect autofocus
74
maximum shutter speed is high (1/8,000 seconds)
image stabilization (Sensor based)
MP count decent (24MP)
sensor size is decent (APS-C)
weather sealing
has phase detect auto focus
not so great battery pack (470 shots)
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Travel Comparison

Pentax I-10 Travel photography details
Sony A77 Travel photography details
57
has built in flash
quite wide (28mm)
no Time Lapse function
low megapixels (12 megapixels)
display is not selfie friendly
somewhat slow maximum aperture (f3.5)
63
weather sealing
MP count decent (24 megapixels)
has built in flash
screen is selfie friendly
no Time Lapse recording
not so great battery pack (470 shots)
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Landscape Comparison

Pentax I-10 Landscape photography highlights
Sony A77 Landscape photography highlights
36
focusing manually
quite wide (28mm)
has image stabilization (Sensor-shift)
fixed lens (fixed lens mount)
somewhat slow maximum aperture (f3.5)
tiny screen (2.7 inches)
manual mode not available
low megapixels (12MP)
very small sensor size (1/2.3")
has no RAW files
no Time Lapse function
71
has manual focus
swap lenses (Sony/Minolta Alpha mount)
decent sized screen (3 inches)
image stabilization (Sensor based)
MP count decent (24 megapixels)
sensor size is decent (APS-C)
supports RAW formats
weather sealing
not so great battery pack (470 per charge)
no Time Lapse recording
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Vlogging Comparison

Pentax I-10 Vlogging info
Sony A77 Vlogging info
28
quite wide (28mm)
has image stabilization (Sensor-shift)
somewhat slow maximum aperture (f3.5)
display is not selfie friendly
video res low (1280 x 720 pxls)
no external mic port
76
screen is selfie friendly
image stabilization (Sensor based)
includes face detection focus
high res video (1920 x 1080 pxls)
has external mic support
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Pentax I-10 vs Sony A77 Specifications

Detailed spec comparison table for Pentax I-10 and Sony A77
 Pentax Optio I-10Sony SLT-A77
General Information
Company Pentax Sony
Model type Pentax Optio I-10 Sony SLT-A77
Category Small Sensor Compact Advanced DSLR
Announced 2010-01-25 2011-10-25
Physical type Compact Mid-size SLR
Sensor Information
Chip Prime Bionz
Sensor type CCD CMOS
Sensor size 1/2.3" APS-C
Sensor dimensions 6.17 x 4.55mm 23.5 x 15.6mm
Sensor surface area 28.1mm² 366.6mm²
Sensor resolution 12 megapixels 24 megapixels
Anti alias filter
Aspect ratio 4:3 and 16:9 3:2 and 16:9
Max resolution 4000 x 3000 6000 x 4000
Max native ISO 6400 16000
Max enhanced ISO - 25600
Min native ISO 80 50
RAW data
Autofocusing
Focus manually
Touch focus
Continuous AF
AF single
Tracking AF
AF selectice
AF center weighted
AF multi area
Live view AF
Face detection AF
Contract detection AF
Phase detection AF
Total focus points 9 19
Cross type focus points - 11
Lens
Lens mount type fixed lens Sony/Minolta Alpha
Lens zoom range 28-140mm (5.0x) -
Maximum aperture f/3.5-5.9 -
Macro focusing range 10cm -
Amount of lenses - 143
Crop factor 5.8 1.5
Screen
Screen type Fixed Type Fully Articulated
Screen sizing 2.7 inches 3 inches
Screen resolution 230 thousand dots 921 thousand dots
Selfie friendly
Liveview
Touch screen
Viewfinder Information
Viewfinder None Electronic
Viewfinder resolution - 2,359 thousand dots
Viewfinder coverage - 100%
Viewfinder magnification - 0.73x
Features
Min shutter speed 4s 30s
Max shutter speed 1/2000s 1/8000s
Continuous shutter rate 1.0fps 12.0fps
Shutter priority
Aperture priority
Expose Manually
Exposure compensation - Yes
Custom WB
Image stabilization
Inbuilt flash
Flash distance 4.00 m 12.00 m
Flash modes Auto, On, Off, Red-eye, Soft Auto, On, Off, Red-Eye, Slow Sync, High Speed Sync, Rear Curtain, Fill-in, Wireless
External flash
Auto exposure bracketing
White balance bracketing
Max flash synchronize - 1/250s
Exposure
Multisegment exposure
Average exposure
Spot exposure
Partial exposure
AF area exposure
Center weighted exposure
Video features
Video resolutions 1280 x 720 (30, 15 fps), 640 x 480 (30, 15 fps), 320 x 240 (30, 15 fps) 1920 x 1080 (60, 24 fps), 1440 x 1080 (30fps), 640 x 424 (29.97 fps)
Max video resolution 1280x720 1920x1080
Video file format Motion JPEG MPEG-4, AVCHD, H.264
Mic support
Headphone support
Connectivity
Wireless Eye-Fi Connected Eye-Fi Connected
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS None BuiltIn
Physical
Environment sealing
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 153 gr (0.34 pounds) 732 gr (1.61 pounds)
Dimensions 101 x 65 x 28mm (4.0" x 2.6" x 1.1") 143 x 104 x 81mm (5.6" x 4.1" x 3.2")
DXO scores
DXO Overall rating not tested 78
DXO Color Depth rating not tested 24.0
DXO Dynamic range rating not tested 13.2
DXO Low light rating not tested 801
Other
Battery life - 470 shots
Type of battery - Battery Pack
Battery ID D-LI92 NP-FM500H
Self timer Yes (2 or 10 sec) Yes (2 or 10 sec)
Time lapse shooting
Type of storage SD/SDHC, Internal SD/SDHC/SDXC/Memory Stick Pro Duo/ Pro-HG Duo
Card slots One One
Price at release $310 $900