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Pentax K-3 II vs Sony A100

Portability
59
Imaging
66
Features
84
Overall
73
Pentax K-3 II front
 
Sony Alpha DSLR-A100 front
Portability
64
Imaging
48
Features
38
Overall
44

Pentax K-3 II vs Sony A100 Key Specs

Pentax K-3 II
(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
  • Released April 2015
  • Replaced the Pentax K-3
Sony A100
(Full Review)
  • 10MP - APS-C Sensor
  • 2.5" Fixed Display
  • ISO 100 - 1600
  • Sensor based Image Stabilization
  • No Video
  • Sony/Minolta Alpha Mount
  • 638g - 133 x 95 x 71mm
  • Released July 2006
  • Replaced the Konica Minolta 5D
  • Replacement is Sony A550
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Pentax K-3 II vs Sony A100 Overview

Here, we are comparing the Pentax K-3 II versus Sony A100, former is a Advanced DSLR while the other is a Entry-Level DSLR by competitors Pentax and Sony. There exists a substantial gap between the image resolutions of the K-3 II (24MP) and A100 (10MP) but both cameras boast the identical sensor sizing (APS-C).

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The K-3 II was released 8 years after the A100 which is quite a big difference as far as technology is concerned. Both of the cameras feature different body design with the Pentax K-3 II being a Mid-size SLR camera and the Sony A100 being a Compact SLR camera.

Before diving into a detailed comparison, here is a concise summation of how the K-3 II matches up against the A100 when considering portability, imaging, features and an overall score.

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Reasons to pick Pentax K-3 II over the Sony A100

 K-3 II A100 
ReleasedApril 2015July 2006More modern by 107 months
Display size3.2"2.5"Larger display (+0.7")
Display resolution1037k230kCrisper display (+807k dot)

Reasons to pick Sony A100 over the Pentax K-3 II

 A100 K-3 II 

Common features in the Pentax K-3 II and Sony A100

 K-3 II A100 
Manually focus Dial accurate focusing
Display typeFixed Fixed Fixed display
Selfie screen Lack of selfie screen
Touch friendly display Lack of Touch friendly display

Pentax K-3 II vs Sony A100 Physical Comparison

In case you're planning to carry around your camera regularly, you should factor its weight and dimensions. The Pentax K-3 II has got external measurements of 131mm x 100mm x 77mm (5.2" x 3.9" x 3.0") with a weight of 800 grams (1.76 lbs) while the Sony A100 has dimensions of 133mm x 95mm x 71mm (5.2" x 3.7" x 2.8") and a weight of 638 grams (1.41 lbs).

Look at the Pentax K-3 II versus Sony A100 in our brand new Camera plus Lens Size Comparison Tool. Camera Size Comparison with Lenses

Do not forget, the weight of an ILC will vary dependant on the lens you are employing at that moment. Underneath is a front view sizing comparison of the K-3 II compared to the A100.

Pentax K-3 II vs Sony A100 size comparison

Looking at dimensions and weight, the portability score of the K-3 II and A100 is 59 and 64 respectively.

Pentax K-3 II vs Sony A100 top view buttons comparison

Pentax K-3 II vs Sony A100 Sensor Comparison

Sometimes, it is hard to envision the contrast between sensor sizes just by reading specs. The pic here will offer you a far better sense of the sensor sizing in the K-3 II and A100.

As you can plainly see, the 2 cameras feature the identical sensor size but not the same megapixels. You can anticipate the Pentax K-3 II to offer greater detail as a result of its extra 14 Megapixels. Greater resolution can also enable you to crop pics way more aggressively. The more recent K-3 II is going to have a benefit when it comes to sensor technology.

Pentax K-3 II vs Sony A100 sensor size comparison

Pentax K-3 II vs Sony A100 Screen and ViewFinder

Pentax K-3 II vs Sony A100 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Pentax K-3 II Portrait photography info
Sony A100 Portrait photography info
79
focusing manually
megapixel count decent (24MP)
nice sensor size (APS-C)
has face detect focus
exports RAW formats
52
has manual focus
sensor size is decent (APS-C)
supports RAW formats
does not have liveview
megapixel count low (10MP)
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Street Comparison

Pentax K-3 II as a Street photography camera
Sony A100 as a Street photography camera
69
image stabilization (Sensor based)
nice sensor size (APS-C)
exports RAW formats
environment proofing
great high ISO (51,200)
fixed screen
64
built in image stabilization (Sensor based)
sensor size is decent (APS-C)
supports RAW formats
fixed screen
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Sports Comparison

Sports photography with Pentax K-3 II
Sports photography with Sony A100
76
high shutter speed (1/8,000s)
image stabilization (Sensor based)
megapixel count decent (24MP)
nice sensor size (APS-C)
has tracking focus
environment proofing
sensor has phase detect auto focus
terrible battery power (720 CIPA)
49
built in image stabilization (Sensor based)
sensor size is decent (APS-C)
supports phase detect autofocus
does not have liveview
slow continuous shooting (3.0 fps)
megapixel count low (10MP)
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Travel Comparison

Pentax K-3 II Travel photography advice
Sony A100 Travel photography advice
56
environment proofing
megapixel count decent (24MP)
terrible battery power (720 per charge)
screen is not selfie friendly
45
has built in flash
does not have Timelapse mode
megapixel count low (10MP)
does not offer selfie friendly screen
Photography Glossary

Landscape Comparison

Pentax K-3 II as a Landscape photography camera
Sony A100 as a Landscape photography camera
78
focusing manually
swap lenses (Pentax KAF2 mount)
pretty good screen size (3.2 inches)
image stabilization (Sensor based)
megapixel count decent (24MP)
nice sensor size (APS-C)
doesnt have low pass filter
great high ISO (51,200)
exports RAW formats
environment proofing
2 card slots
terrible battery power (720 shots)
53
has manual focus
swap lenses (Sony/Minolta Alpha mount)
built in image stabilization (Sensor based)
sensor size is decent (APS-C)
supports RAW formats
small screen (2.5 inch)
does not have liveview
megapixel count low (10MP)
does not have Timelapse mode
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Vlogging Comparison

Pentax K-3 II as a Vlogging camera
Sony A100 as a Vlogging camera
34
image stabilization (Sensor based)
has face detect focus
high quality video (1920 x 1080 pxls)
includes microphone support
screen is not selfie friendly
9
no video shooting
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Pentax K-3 II vs Sony A100 Specifications

Detailed spec comparison table for Pentax K-3 II and Sony A100
 Pentax K-3 IISony Alpha DSLR-A100
General Information
Company Pentax Sony
Model type Pentax K-3 II Sony Alpha DSLR-A100
Class Advanced DSLR Entry-Level DSLR
Released 2015-04-23 2006-07-31
Physical type Mid-size SLR Compact SLR
Sensor Information
Chip Prime III -
Sensor type CMOS CCD
Sensor size APS-C APS-C
Sensor measurements 23.5 x 15.6mm 23.6 x 15.8mm
Sensor surface area 366.6mm² 372.9mm²
Sensor resolution 24MP 10MP
Anti alias filter
Aspect ratio 3:2 3:2
Peak resolution 6016 x 4000 3872 x 2592
Highest native ISO 51200 1600
Minimum native ISO 100 100
RAW format
Autofocusing
Focus manually
Touch to focus
Continuous autofocus
Autofocus single
Autofocus tracking
Autofocus selectice
Center weighted autofocus
Autofocus multi area
Live view autofocus
Face detection focus
Contract detection focus
Phase detection focus
Total focus points 27 9
Cross type focus points 25 -
Lens
Lens mount type Pentax KAF2 Sony/Minolta Alpha
Amount of lenses 151 143
Crop factor 1.5 1.5
Screen
Screen type Fixed Type Fixed Type
Screen diagonal 3.2 inch 2.5 inch
Resolution of screen 1,037k dots 230k dots
Selfie friendly
Liveview
Touch function
Viewfinder Information
Viewfinder type Optical (pentaprism) Optical (pentamirror)
Viewfinder coverage 100 percent 95 percent
Viewfinder magnification 0.64x 0.55x
Features
Min shutter speed 30 secs 30 secs
Max shutter speed 1/8000 secs 1/4000 secs
Continuous shutter rate 8.3 frames per sec 3.0 frames per sec
Shutter priority
Aperture priority
Manually set exposure
Exposure compensation Yes Yes
Set white balance
Image stabilization
Inbuilt flash
Flash distance no built-in flash -
Flash settings Auto Flash Discharge, Auto Flash + Red-eye Reduction, Flash On, Flash On + Red-eye Reduction, Slow-speed Sync, Slow-speed Sync + Red-eye, P-TTL, Trailing Curtain Sync, Contrast-control-sync, High-speed sync, Wireless sync (available with dedicated external flash) Auto, Fill-in, Red-Eye reduction, Slow Sync, Off
External flash
AE bracketing
WB bracketing
Max flash synchronize 1/180 secs 1/160 secs
Exposure
Multisegment metering
Average metering
Spot metering
Partial metering
AF area metering
Center weighted metering
Video features
Video resolutions 1920 x 1080 (60i, 50i, 30p, 25p, 24p), 1280 x 720 (60p, 50p, 30p, 25p, 24p) -
Highest video resolution 1920x1080 None
Video file format MPEG-4, H.264 -
Microphone support
Headphone support
Connectivity
Wireless Optional None
Bluetooth
NFC
HDMI
USB USB 3.0 (5 GBit/sec) USB 2.0 (480 Mbit/sec)
GPS BuiltIn None
Physical
Environment sealing
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 800g (1.76 pounds) 638g (1.41 pounds)
Physical dimensions 131 x 100 x 77mm (5.2" x 3.9" x 3.0") 133 x 95 x 71mm (5.2" x 3.7" x 2.8")
DXO scores
DXO Overall rating 80 61
DXO Color Depth rating 23.6 22.0
DXO Dynamic range rating 13.6 11.2
DXO Low light rating 1106 476
Other
Battery life 720 images -
Type of battery Battery Pack -
Battery ID D-LI90 NP-FM55H
Self timer Yes ( 2 or 12 seconds) Yes (2 or 10 sec)
Time lapse shooting
Type of storage Dual SD/SDHC/SDXC Compact Flash (Type I or II)
Card slots Two 1
Pricing at release $829 $1,000