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Pentax K-x vs Sony A390

Portability
69
Imaging
52
Features
47
Overall
50
Pentax K-x front
 
Sony Alpha DSLR-A390 front
Portability
66
Imaging
54
Features
54
Overall
54

Pentax K-x vs Sony A390 Key Specs

Pentax K-x
(Full Review)
  • 12MP - APS-C Sensor
  • 2.7" Fixed Screen
  • ISO 100 - 6400 (Bump to 12800)
  • Sensor based Image Stabilization
  • 1/6000s Maximum Shutter
  • 1280 x 720 video
  • Pentax KAF2 Mount
  • 580g - 123 x 92 x 68mm
  • Introduced December 2009
Sony A390
(Full Review)
  • 14MP - APS-C Sensor
  • 2.7" Tilting Screen
  • ISO 100 - 3200
  • Sensor based Image Stabilization
  • No Video
  • Sony/Minolta Alpha Mount
  • 549g - 128 x 97 x 86mm
  • Revealed July 2010
  • Previous Model is Sony A380
Photography Glossary

Pentax K-x vs Sony A390 Overview

Lets look closer at the Pentax K-x versus Sony A390, both Entry-Level DSLR cameras by companies Pentax and Sony. The resolution of the K-x (12MP) and the A390 (14MP) is relatively close and both cameras provide the identical sensor sizes (APS-C).

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The K-x was revealed 7 months earlier than the A390 and they are of a similar age. Each of the cameras feature the same body design (Compact SLR).

Before diving right into a thorough comparison, here is a short summary of how the K-x matches up vs the A390 in the way of portability, imaging, features and an overall mark.

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Reasons to pick Pentax K-x over the Sony A390

 K-x A390 

Reasons to pick Sony A390 over the Pentax K-x

 A390 K-x 
RevealedJuly 2010December 2009Newer by 7 months
Screen typeTiltingFixed Tilting screen

Common features in the Pentax K-x and Sony A390

 K-x A390 
Manual focus Very precise focus
Screen size2.7"2.7"Same screen dimensions
Screen resolution230k230kExact same screen resolution
Selfie screen Neither features selfie screen
Touch screen Absent Touch screen

Pentax K-x vs Sony A390 Physical Comparison

For anyone who is going to travel with your camera frequently, you'll need to consider its weight and proportions. The Pentax K-x enjoys physical dimensions of 123mm x 92mm x 68mm (4.8" x 3.6" x 2.7") with a weight of 580 grams (1.28 lbs) while the Sony A390 has measurements of 128mm x 97mm x 86mm (5.0" x 3.8" x 3.4") accompanied by a weight of 549 grams (1.21 lbs).

Check the Pentax K-x versus Sony A390 in our brand new Camera plus Lens Size Comparison Tool. Camera Size Comparison with Lenses

Take into account, the weight of an ILC will differ based on the lens you are employing at that moment. Here is a front view over all size comparison of the K-x and the A390.

Pentax K-x vs Sony A390 size comparison

Looking at size and weight, the portability grade of the K-x and A390 is 69 and 66 respectively.

Pentax K-x vs Sony A390 top view buttons comparison

Pentax K-x vs Sony A390 Sensor Comparison

In many cases, its tough to envision the gap in sensor dimensions simply by looking through technical specs. The picture here may provide you a clearer sense of the sensor sizes in the K-x and A390.

As you can tell, each of these cameras come with the identical sensor size albeit not the same MP. You can count on the Sony A390 to result in greater detail because of its extra 2MP. Higher resolution will enable you to crop pictures a good deal more aggressively. The more aged K-x will be disadvantaged with regard to sensor innovation.

Pentax K-x vs Sony A390 sensor size comparison

Pentax K-x vs Sony A390 Screen and ViewFinder

Pentax K-x vs Sony A390 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Pentax K-x Portrait photography information
Sony A390 Portrait photography information
63
focusing manually
good sensor size (APS-C)
provides face detect focusing
exports RAW files
low MP (12MP)
72
you can focus manually
megapixel count decent (14MP)
good sensor size (APS-C)
has face detection autofocus
saves RAW files
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Street Comparison

Pentax K-x Street photography information
Sony A390 Street photography information
67
image stabilization (Sensor based)
good sensor size (APS-C)
exports RAW files
no articulating screen
76
has a tilting screen
image stabilization (Sensor based)
good sensor size (APS-C)
saves RAW files
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Sports Comparison

Pentax K-x Sports photography advice
Sony A390 Sports photography advice
61
great max shutter speed (1/6,000s)
image stabilization (Sensor based)
good sensor size (APS-C)
better than average battery power (1,900 shots)
comes with phase detect AF
painfully slow continuous shooting (5.0 frames/s)
low MP (12MP)
60
image stabilization (Sensor based)
megapixel count decent (14 megapixels)
good sensor size (APS-C)
has phase detect autofocus
painfully slow continuous shooting (3.0 frames per second)
bad battery (230 shots)
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Travel Comparison

Pentax K-x Travel photography info
Sony A390 Travel photography info
54
better than average battery power (1,900 per charge)
flash built-in
missing Time Lapse function
low MP (12MP)
display isn't selfie friendly
53
megapixel count decent (14MP)
has built in flash
no Time Lapse mode
bad battery (230 shots)
screen isn't selfie friendly
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Landscape Comparison

Pentax K-x as a Landscape photography camera
Sony A390 as a Landscape photography camera
61
focusing manually
switch lenses (Pentax KAF2 mount)
image stabilization (Sensor based)
good sensor size (APS-C)
exports RAW files
better than average battery power (1,900 per charge)
screen is small (2.7 inches)
low MP (12 megapixels)
missing Time Lapse function
61
you can focus manually
change lenses (Sony/Minolta Alpha mount)
image stabilization (Sensor based)
megapixel count decent (14MP)
good sensor size (APS-C)
saves RAW files
screen is small (2.7 inch)
bad battery (230 per charge)
no Time Lapse mode
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Vlogging Comparison

Pentax K-x Vlogging info
Sony A390 Vlogging info
27
image stabilization (Sensor based)
provides face detect focusing
display isn't selfie friendly
video resolution low (1280 x 720 pixels)
missing mic socket
9
can't shoot video
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Pentax K-x vs Sony A390 Specifications

Detailed spec comparison table for Pentax K-x and Sony A390
 Pentax K-xSony Alpha DSLR-A390
General Information
Manufacturer Pentax Sony
Model Pentax K-x Sony Alpha DSLR-A390
Type Entry-Level DSLR Entry-Level DSLR
Introduced 2009-12-23 2010-07-28
Physical type Compact SLR Compact SLR
Sensor Information
Chip Prime Bionz
Sensor type CMOS CCD
Sensor size APS-C APS-C
Sensor dimensions 23.6 x 15.8mm 23.5 x 15.7mm
Sensor area 372.9mm² 369.0mm²
Sensor resolution 12 megapixel 14 megapixel
Anti aliasing filter
Aspect ratio 3:2 3:2 and 16:9
Highest resolution 4288 x 2848 4592 x 3056
Highest native ISO 6400 3200
Highest boosted ISO 12800 -
Min native ISO 100 100
RAW pictures
Autofocusing
Manual focus
Autofocus touch
Continuous autofocus
Single autofocus
Autofocus tracking
Autofocus selectice
Autofocus center weighted
Autofocus multi area
Live view autofocus
Face detection autofocus
Contract detection autofocus
Phase detection autofocus
Number of focus points 11 9
Lens
Lens mounting type Pentax KAF2 Sony/Minolta Alpha
Amount of lenses 151 143
Crop factor 1.5 1.5
Screen
Type of screen Fixed Type Tilting
Screen diagonal 2.7 inches 2.7 inches
Screen resolution 230k dots 230k dots
Selfie friendly
Liveview
Touch functionality
Screen technology TFT LCD monitor -
Viewfinder Information
Viewfinder type Optical (pentamirror) Optical (pentamirror)
Viewfinder coverage 96 percent 95 percent
Viewfinder magnification 0.57x 0.49x
Features
Slowest shutter speed 30s 30s
Maximum shutter speed 1/6000s 1/4000s
Continuous shooting rate 5.0 frames/s 3.0 frames/s
Shutter priority
Aperture priority
Manual mode
Exposure compensation Yes Yes
Custom white balance
Image stabilization
Inbuilt flash
Flash range 16.00 m 10.00 m (at ISO 100)
Flash modes Auto, On, Off, Red-Eye, Slow Sync, Rear curtain, Wireless Auto, On, Off, Red-Eye, Slow Sync, Rear Curtain, Wireless
Hot shoe
AEB
White balance bracketing
Maximum flash synchronize 1/180s 1/160s
Exposure
Multisegment
Average
Spot
Partial
AF area
Center weighted
Video features
Video resolutions 1280 x 720 (24 fps), 640 x 416 (24 fps) -
Highest video resolution 1280x720 None
Video file format Motion JPEG -
Mic support
Headphone support
Connectivity
Wireless None None
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS None None
Physical
Environment sealing
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 580 grams (1.28 lb) 549 grams (1.21 lb)
Physical dimensions 123 x 92 x 68mm (4.8" x 3.6" x 2.7") 128 x 97 x 86mm (5.0" x 3.8" x 3.4")
DXO scores
DXO All around score 72 66
DXO Color Depth score 22.8 22.5
DXO Dynamic range score 12.5 11.5
DXO Low light score 811 607
Other
Battery life 1900 photos 230 photos
Battery style Battery Pack Battery Pack
Battery model 4 x AA NP-FH50
Self timer Yes (2 or 12 sec) Yes (2 or 10 sec)
Time lapse shooting
Type of storage SD/SDHC card SD/ SDHC, Memory Stick Pro Duo
Card slots 1 1
Launch price $600 $500