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Pentax K-x vs Sony A37

Portability
69
Imaging
52
Features
47
Overall
50
Pentax K-x front
 
Sony SLT-A37 front
Portability
67
Imaging
57
Features
65
Overall
60

Pentax K-x vs Sony A37 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
  • Released December 2009
Sony A37
(Full Review)
  • 16MP - APS-C Sensor
  • 2.6" Tilting Display
  • ISO 100 - 25600
  • Sensor based Image Stabilization
  • 1920 x 1080 video
  • Sony/Minolta Alpha Mount
  • 506g - 124 x 92 x 85mm
  • Revealed May 2012
  • Previous Model is Sony A35
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Pentax K-x vs Sony A37 Overview

The following is a thorough analysis of the Pentax K-x vs Sony A37, both Entry-Level DSLR cameras by companies Pentax and Sony. There exists a large gap among the resolutions of the K-x (12MP) and A37 (16MP) but both cameras boast the same sensor measurements (APS-C).

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The K-x was announced 3 years earlier than the A37 which is a fairly serious difference as far as camera technology is concerned. Both of the cameras have the same body design (Compact SLR).

Before getting right into a full comparison, here is a brief overview of how the K-x grades against the A37 in regards to portability, imaging, features and an overall mark.

Photography Glossary
	
	

Reasons to pick Pentax K-x over the Sony A37

 K-x A37 
Display dimensions2.7"2.6"Larger display (+0.1")

Reasons to pick Sony A37 over the Pentax K-x

 A37 K-x 
RevealedMay 2012December 2009Newer by 29 months
Display typeTiltingFixed Tilting display

Common features in the Pentax K-x and Sony A37

 K-x A37 
Manual focus Dial precise focus
Display resolution230k230kIdentical display resolution
Selfie screen Neither features selfie screen
Touch display Neither features Touch display

Pentax K-x vs Sony A37 Physical Comparison

When you are looking to travel with your camera often, you have to factor in its weight and proportions. The Pentax K-x enjoys outer dimensions of 123mm x 92mm x 68mm (4.8" x 3.6" x 2.7") having a weight of 580 grams (1.28 lbs) while the Sony A37 has measurements of 124mm x 92mm x 85mm (4.9" x 3.6" x 3.3") and a weight of 506 grams (1.12 lbs).

Check the Pentax K-x vs Sony A37 in our completely new Camera & Lens Size Comparison Tool. Camera Size Comparison with Lenses

Remember, the weight of an ILC will differ based on the lens you have attached during that time. Following is a front view overall size comparison of the K-x versus the A37.

Pentax K-x vs Sony A37 size comparison

Considering dimensions and weight, the portability rating of the K-x and A37 is 69 and 67 respectively.

Pentax K-x vs Sony A37 top view buttons comparison

Pentax K-x vs Sony A37 Sensor Comparison

More often than not, its difficult to visualise the contrast in sensor dimensions merely by going through specifications. The image below will give you a far better sense of the sensor dimensions in the K-x and A37.

To sum up, both of these cameras have the same sensor dimensions but not the same resolution. You can anticipate the Sony A37 to produce extra detail with its extra 4 Megapixels. Greater resolution will also let you crop pics a bit more aggressively. The more aged K-x will be disadvantaged when it comes to sensor tech.

Pentax K-x vs Sony A37 sensor size comparison

Pentax K-x vs Sony A37 Screen and ViewFinder

Pentax K-x vs Sony A37 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Pentax K-x Portrait photography factors
Sony A37 Portrait photography factors
63
focusing manually
nice sensor size (APS-C)
supports face detect autofocus
exports RAW files
sensor resolution low (12MP)
74
has manual focus
sensor resolution is decent (16 megapixels)
sensor size is nice (APS-C)
supports face detection focus
exports RAW files
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Street Comparison

Street photography with Pentax K-x
Street photography with Sony A37
67
built in image stabilization (Sensor based)
nice sensor size (APS-C)
exports RAW files
screen does not articulate
77
has a tilting screen
image stabilization (Sensor based)
sensor size is nice (APS-C)
exports RAW files
very good ISO range (25,600)
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Sports Comparison

Pentax K-x Sports photography info
Sony A37 Sports photography info
61
maximum shutter speed is high (1/6,000 seconds)
built in image stabilization (Sensor based)
nice sensor size (APS-C)
great battery power (1,900 CIPA)
comes with phase detect autofocus
max fps very slow (5.0 fps)
sensor resolution low (12 megapixels)
61
image stabilization (Sensor based)
sensor resolution is decent (16MP)
sensor size is nice (APS-C)
has phase detect auto focus
slow continuous shooting (6.0 fps)
bad battery power (500 per charge)
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Travel Comparison

Pentax K-x Travel photography details
Sony A37 Travel photography details
54
great battery power (1,900 shots)
flash built-in
missing Time Lapse recording
sensor resolution low (12MP)
display isn't selfie friendly
54
sensor resolution is decent (16MP)
has built in flash
does not have Timelapse function
bad battery power (500 shots)
screen isn't selfie friendly
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Landscape Comparison

Landscape photography with Pentax K-x
Landscape photography with Sony A37
61
focusing manually
switch lenses (Pentax KAF2 mount)
built in image stabilization (Sensor based)
nice sensor size (APS-C)
exports RAW files
great battery power (1,900 per charge)
screen is somewhat small (2.7")
sensor resolution low (12MP)
missing Time Lapse recording
64
has manual focus
change lenses (Sony/Minolta Alpha mount)
image stabilization (Sensor based)
sensor resolution is decent (16MP)
sensor size is nice (APS-C)
very good ISO range (25,600)
exports RAW files
screen is small (2.6 inch)
bad battery power (500 per charge)
does not have Timelapse function
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Vlogging Comparison

Pentax K-x Vlogging factors
Sony A37 Vlogging factors
27
built in image stabilization (Sensor based)
supports face detect autofocus
display isn't selfie friendly
video resolution low (1280 x 720 pxls)
missing mic port
35
image stabilization (Sensor based)
supports face detection focus
good video quality (1920 x 1080 pxls)
has external microphone port
screen isn't selfie friendly
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Pentax K-x vs Sony A37 Specifications

Detailed spec comparison table for Pentax K-x and Sony A37
 Pentax K-xSony SLT-A37
General Information
Make Pentax Sony
Model Pentax K-x Sony SLT-A37
Class Entry-Level DSLR Entry-Level DSLR
Released 2009-12-23 2012-05-16
Body design Compact SLR Compact SLR
Sensor Information
Chip Prime -
Sensor type CMOS CMOS
Sensor size APS-C APS-C
Sensor measurements 23.6 x 15.8mm 23.5 x 15.6mm
Sensor area 372.9mm² 366.6mm²
Sensor resolution 12 megapixels 16 megapixels
Anti aliasing filter
Aspect ratio 3:2 3:2 and 16:9
Maximum resolution 4288 x 2848 4912 x 3264
Maximum native ISO 6400 25600
Maximum boosted ISO 12800 -
Lowest native ISO 100 100
RAW data
Autofocusing
Manual focus
Autofocus touch
Continuous autofocus
Autofocus single
Autofocus tracking
Autofocus selectice
Center weighted autofocus
Autofocus multi area
Live view autofocus
Face detection autofocus
Contract detection autofocus
Phase detection autofocus
Number of focus points 11 15
Cross focus points - 3
Lens
Lens mount Pentax KAF2 Sony/Minolta Alpha
Amount of lenses 151 143
Focal length multiplier 1.5 1.5
Screen
Range of screen Fixed Type Tilting
Screen sizing 2.7" 2.6"
Resolution of screen 230 thousand dot 230 thousand dot
Selfie friendly
Liveview
Touch screen
Screen tech TFT LCD monitor -
Viewfinder Information
Viewfinder type Optical (pentamirror) Electronic
Viewfinder resolution - 1,440 thousand dot
Viewfinder coverage 96% 100%
Viewfinder magnification 0.57x 0.73x
Features
Lowest shutter speed 30 seconds 30 seconds
Highest shutter speed 1/6000 seconds 1/4000 seconds
Continuous shooting speed 5.0 frames per second 6.0 frames per second
Shutter priority
Aperture priority
Manual exposure
Exposure compensation Yes Yes
Change white balance
Image stabilization
Inbuilt flash
Flash range 16.00 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
Highest flash sync 1/180 seconds 1/160 seconds
Exposure
Multisegment metering
Average metering
Spot metering
Partial metering
AF area metering
Center weighted metering
Video features
Supported video resolutions 1280 x 720 (24 fps), 640 x 416 (24 fps) 1920 x 1080 (60, 29.97 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
Microphone jack
Headphone jack
Connectivity
Wireless None Eye-Fi Connected
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS None None
Physical
Environmental seal
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 580g (1.28 pounds) 506g (1.12 pounds)
Physical dimensions 123 x 92 x 68mm (4.8" x 3.6" x 2.7") 124 x 92 x 85mm (4.9" x 3.6" x 3.3")
DXO scores
DXO All around score 72 75
DXO Color Depth score 22.8 23.3
DXO Dynamic range score 12.5 12.9
DXO Low light score 811 799
Other
Battery life 1900 photographs 500 photographs
Style of battery Battery Pack Battery Pack
Battery model 4 x AA NP-FW50
Self timer Yes (2 or 12 sec) Yes (2 or 10 sec, 10 sec 3 or 5 images)
Time lapse feature
Storage media SD/SDHC card SD/SDHC/SDXC/Memory Stick Pro Duo/ Pro-HG Duo
Storage slots 1 1
Pricing at launch $600 $522