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Pentax K-x vs Sony A100

Portability
69
Imaging
52
Features
47
Overall
50
Pentax K-x front
 
Sony Alpha DSLR-A100 front
Portability
64
Imaging
49
Features
38
Overall
44

Pentax K-x vs Sony A100 Key Specs

Pentax K-x
(Full Review)
  • 12MP - APS-C Sensor
  • 2.7" Fixed Screen
  • ISO 100 - 6400 (Expand to 12800)
  • Sensor based Image Stabilization
  • 1/6000s Maximum Shutter
  • 1280 x 720 video
  • Pentax KAF2 Mount
  • 580g - 123 x 92 x 68mm
  • Revealed December 2009
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
  • Announced July 2006
  • Old Model is Konica Minolta 5D
  • Replacement is Sony A550
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Pentax K-x vs Sony A100 Overview

In this article, we are analyzing the Pentax K-x versus Sony A100, both Entry-Level DSLR cameras by companies Pentax and Sony. The image resolution of the K-x (12MP) and the A100 (10MP) is fairly close and they possess the same exact sensor measurements (APS-C).

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The K-x was revealed 3 years after the A100 which is a fairly sizable gap as far as camera tech is concerned. Both cameras offer the identical body type (Compact SLR).

Before going in to a complete comparison, below is a brief introduction of how the K-x matches up versus the A100 in the way of portability, imaging, features and an overall score.

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Reasons to pick Pentax K-x over the Sony A100

 K-x A100 
AnnouncedDecember 2009July 2006More modern by 42 months
Display sizing2.7"2.5"Larger display (+0.2")

Reasons to pick Sony A100 over the Pentax K-x

 A100 K-x 

Common features in the Pentax K-x and Sony A100

 K-x A100 
Focus manually Dial accurate focus
Display typeFixed Fixed Fixed display
Display resolution230k230kSame display resolution
Selfie screen Neither includes selfie screen
Touch display Neither includes Touch display

Pentax K-x vs Sony A100 Physical Comparison

For those who are aiming to carry around your camera frequently, you will want to think about its weight and volume. The Pentax K-x features external dimensions of 123mm x 92mm x 68mm (4.8" x 3.6" x 2.7") having a weight of 580 grams (1.28 lbs) and the Sony A100 has sizing of 133mm x 95mm x 71mm (5.2" x 3.7" x 2.8") accompanied by a weight of 638 grams (1.41 lbs).

Check out the Pentax K-x versus Sony A100 in the all new Camera with Lens Size Comparison Tool. Camera Size Comparison with Lenses

Remember, the weight of an Interchangeable Lens Camera will change dependant on the lens you use at the time. The following is the front view sizing comparison of the K-x vs the A100.

Pentax K-x vs Sony A100 size comparison

Taking into consideration size and weight, the portability score of the K-x and A100 is 69 and 64 respectively.

Pentax K-x vs Sony A100 top view buttons comparison

Pentax K-x vs Sony A100 Sensor Comparison

Generally, it can be tough to see the difference in sensor sizes merely by researching specifications. The picture underneath will provide you a better sense of the sensor sizes in the K-x and A100.

Plainly, each of these cameras offer the same exact sensor sizing but not the same MP. You should anticipate the Pentax K-x to provide you with extra detail because of its extra 2 Megapixels. Greater resolution will let you crop pics a little more aggressively. The more modern K-x will have a benefit when it comes to sensor innovation.

Pentax K-x vs Sony A100 sensor size comparison

Pentax K-x vs Sony A100 Screen and ViewFinder

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

Portrait Comparison

Pentax K-x Portrait photography details
Sony A100 Portrait photography details
63
focusing manually
nice sensor size (APS-C)
provides face detect focus
saves RAW files
megapixel count low (12 megapixels)
53
focusing manually
good sensor size (APS-C)
supports RAW formats
doesn't have liveview
low resolution sensor (10MP)
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Street Comparison

Street photography with Pentax K-x
Street photography with Sony A100
67
built in image stabilization (Sensor based)
nice sensor size (APS-C)
saves RAW files
screen is fixed
65
has image stabilization (Sensor based)
good sensor size (APS-C)
supports RAW formats
screen is fixed
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Sports Comparison

Pentax K-x Sports photography info
Sony A100 Sports photography info
61
max shutter speed is good (1/6,000s)
built in image stabilization (Sensor based)
nice sensor size (APS-C)
great battery (1,900 shots)
has phase detect auto focus
max fps very slow (5.0 fps)
megapixel count low (12 megapixels)
49
has image stabilization (Sensor based)
good sensor size (APS-C)
comes with phase detect AF
doesn't have liveview
continuous shooting slow (3.0 frames/s)
low resolution sensor (10 megapixels)
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Travel Comparison

Travel photography with Pentax K-x
Travel photography with Sony A100
54
great battery (1,900 CIPA)
built-in flash
does not have Time Lapse mode
megapixel count low (12MP)
doesn't feature selfie friendly screen
45
has built in flash
missing Timelapse function
low resolution sensor (10 megapixels)
screen is not selfie friendly
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Landscape Comparison

Pentax K-x Landscape photography info
Sony A100 Landscape photography info
61
focusing manually
change lenses (Pentax KAF2 mount)
built in image stabilization (Sensor based)
nice sensor size (APS-C)
saves RAW files
great battery (1,900 shots)
small screen (2.7 inches)
megapixel count low (12 megapixels)
does not have Time Lapse mode
53
focusing manually
change lenses (Sony/Minolta Alpha mount)
has image stabilization (Sensor based)
good sensor size (APS-C)
supports RAW formats
screen is small (2.5")
doesn't have liveview
low resolution sensor (10MP)
missing Timelapse function
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Vlogging Comparison

Pentax K-x as a Vlogging camera
Sony A100 as a Vlogging camera
27
built in image stabilization (Sensor based)
provides face detect focus
doesn't feature selfie friendly screen
low res video (1280 x 720 pxls)
does not have mic port
9
can't shoot video
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Pentax K-x vs Sony A100 Specifications

Detailed spec comparison table for Pentax K-x and Sony A100
 Pentax K-xSony Alpha DSLR-A100
General Information
Brand Pentax Sony
Model type Pentax K-x Sony Alpha DSLR-A100
Type Entry-Level DSLR Entry-Level DSLR
Revealed 2009-12-23 2006-07-31
Body design Compact SLR Compact SLR
Sensor Information
Chip Prime -
Sensor type CMOS CCD
Sensor size APS-C APS-C
Sensor measurements 23.6 x 15.8mm 23.6 x 15.8mm
Sensor area 372.9mm² 372.9mm²
Sensor resolution 12MP 10MP
Anti alias filter
Aspect ratio 3:2 3:2
Highest Possible resolution 4288 x 2848 3872 x 2592
Maximum native ISO 6400 1600
Maximum enhanced ISO 12800 -
Min native ISO 100 100
RAW support
Autofocusing
Focus manually
Touch to focus
Continuous autofocus
Single autofocus
Tracking autofocus
Selective autofocus
Autofocus center weighted
Autofocus multi area
Autofocus live view
Face detection focus
Contract detection focus
Phase detection focus
Total focus points 11 9
Lens
Lens support Pentax KAF2 Sony/Minolta Alpha
Amount of lenses 151 143
Focal length multiplier 1.5 1.5
Screen
Screen type Fixed Type Fixed Type
Screen size 2.7 inches 2.5 inches
Resolution of screen 230 thousand dot 230 thousand dot
Selfie friendly
Liveview
Touch function
Screen tech TFT LCD monitor -
Viewfinder Information
Viewfinder type Optical (pentamirror) Optical (pentamirror)
Viewfinder coverage 96% 95%
Viewfinder magnification 0.57x 0.55x
Features
Min shutter speed 30 secs 30 secs
Max shutter speed 1/6000 secs 1/4000 secs
Continuous shutter speed 5.0fps 3.0fps
Shutter priority
Aperture priority
Manual exposure
Exposure compensation Yes Yes
Set white balance
Image stabilization
Inbuilt flash
Flash distance 16.00 m -
Flash settings Auto, On, Off, Red-Eye, Slow Sync, Rear curtain, Wireless Auto, Fill-in, Red-Eye reduction, Slow Sync, Off
External flash
Auto exposure bracketing
WB bracketing
Max flash sync 1/180 secs 1/160 secs
Exposure
Multisegment exposure
Average exposure
Spot exposure
Partial exposure
AF area exposure
Center weighted exposure
Video features
Video resolutions 1280 x 720 (24 fps), 640 x 416 (24 fps) -
Maximum video resolution 1280x720 None
Video format Motion JPEG -
Microphone input
Headphone input
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 580 gr (1.28 lb) 638 gr (1.41 lb)
Dimensions 123 x 92 x 68mm (4.8" x 3.6" x 2.7") 133 x 95 x 71mm (5.2" x 3.7" x 2.8")
DXO scores
DXO Overall rating 72 61
DXO Color Depth rating 22.8 22.0
DXO Dynamic range rating 12.5 11.2
DXO Low light rating 811 476
Other
Battery life 1900 pictures -
Battery format Battery Pack -
Battery ID 4 x AA NP-FM55H
Self timer Yes (2 or 12 sec) Yes (2 or 10 sec)
Time lapse feature
Type of storage SD/SDHC card Compact Flash (Type I or II)
Storage slots Single Single
Launch pricing $600 $1,000