Pentax
K-x
 vs
Sony Alpha
DSLR-A330

General

 Pentax K-x Sony Alpha DSLR-A330
Brand
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 Pentax Sony
Lowest price
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 $674.92 Unknown
Announced
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 September, 2009 May, 2009

Sensor
Type
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 CMOS CCD
Size
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 APS-C 23.6x15.8mm APS-C 23.5x15.7mm
Crop factor
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 1.5x 1.5x
Megapixels
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 12.2 MP 10 MP
Light sensitivity
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 6,400 ISO 3,200 ISO
Light sensitivity (boost)
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 12,800 ISO None
Sensor cleaning
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 Yes Unknown

Sensor (Advanced)
True resolution
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 12.2 MP 10 MP
Native resolution
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 4288 x 2848 3872 x 2592
Pixel size
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 30.5 µm² 36.8 µm²

Screen
Type
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 LCD LCD
Size
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 2.7" 2.7"
Resolution
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 230k dots 230k dots
Touch screen
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 No No
Flips out
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 No Yes
Live view
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 Yes Yes

Lenses
Lens availability
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 90 lenses 92 lenses
Lens focus motor
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 Yes Yes
Lens mount
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 Pentax K Sony Alpha

Form factor
Size
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 123x92x68 mm 128x97x71 mm
Depth
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 2.7" 2.8"
Weight
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 580 g 529 g
Interchangeable lenses
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 Yes Yes
Waterproof
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 No No
Weather sealed
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 No No

Viewfinder
Type
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 Pentamirror Pentamirror
Viewfinder size
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 0.56x 0.48x
Coverage
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 96% 95%

Movies
Format
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 720p @ 24fps None
Supports 24p
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 Yes n/a
High-speed framerate
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 None n/a
External mic jack
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 No n/a
Autofocus
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 None None
All formats
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 640 x 416 @ 24fps
720p @ 24fps		 n/a

Features
Panorama
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 No No
HDR
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 Yes No
3D
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 No No
Image stabilization
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 Sensor shift Sensor shift
Supports RAW
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 Yes Yes
GPS
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 No No

Performance
Startup delay
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 600 ms Unknown
Shutter lag
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 97 ms Unknown
Battery life
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 420 shots Unknown
Continuous shooting
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 4.7 fps 2.5 fps

Focus system
Autofocus
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 Phase detection Contrast detection
Focus points
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 11 Unknown
Cross type focus points
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 9 Unknown

Shutter
Max
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 1/6000s 1/4000s
Min
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 30s 30s

Flash
Built-in flash
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 Yes Yes
Popup
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 Yes Yes
External connection
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 Yes Yes

Storage
Storage slots
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 1 2
Supported formats
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 SD
SDHC		 SDHC
SD
Memory Stick
Memory Stick Duo
Memory Stick PRO Duo
SD
Memory Stick
Memory Stick PRO Duo
SDHC
Memory Stick Duo

DXO Mark Scores
Image quality
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 72.0 64.0
Color depth
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 22.8 bits 22.4 bits
Dynamic range
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 12.5 EV 11.5 EV
Low light performance
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 811 ISO 535 ISO