Camera Rocket Review Our evaluation of A65 vs K-x

Image Quality

RAW image quality independent of lens

DxOMark Low light, DxOMark Color depth and DxOMark Dynamic range

Focusing

How fast and easily does the camera nail focus

Focus lag, cross type focus points and focus points

Responsiveness

How much delay is there between you and your photo?

Focus lag, continuous shooting and Startup delay

Reviews

What do the experts think?

Reviews from sonyalpharumors.com, techradar.com, photographyblog.com and 1 more

No winner declared

Too close to call

Benchmarks Real world tests of SLT A65 vs Pentax K-x

Low light image quality Highest ISO setting that still achieves great image quality

SLT A65
717 ISO
Pentax K-x
811 ISO

Resolution Results from photos of standard resolution charts

SLT A65
3,000 LPH
Pentax K-x
2,600 LPH

Focus lag Delay between fully pressing shutter to image capture

SLT A65
138 ms
Pentax K-x
97 ms

Shutter lag Delay to take a photo when prefocused

SLT A65
54 ms
Pentax K-x
82 ms

Startup delay Delay from power on to first photo

SLT A65
2,800 ms
Pentax K-x
600 ms

Continuous shooting Delay between fully pressing shutter to image capture

SLT A65
10 fps
Pentax K-x
4.7 fps

Features Key features of the SLT A65  vs Pentax K-x 

Megapixels Maximum resolution images are captured at

SLT A65
24 MP
Pentax K-x
12.2 MP

Max ISO Maximum light sensitivity of the sensor

SLT A65
25,600 ISO
Pentax K-x
12,800 ISO

Focus points How many different points the camera can focus on

Screen size Larger screens make it easier to preview and review photos

Viewfinder size Large viewfinders are brighter and more comfortable to use

SLT A65
0.71x
Pentax K-x
0.56x

Pixel size How much area of the sensor is dedicated to each pixel

SLT A65
15.3 microns
Pentax K-x
30.5 microns

Reviews Word on the street

SLT A65  vs Pentax K-x 

9.0
10.0
Image stabilisation via the camera body is a great feature that works very well when hand-holding the camera in low-light conditions or when using the telephoto end of the zoom range.
Pentax K-x

8.0
8.0
Raw files also offer the capacity to fine-tune the colours post-shoot, as well as providing the opportunity to pull extra detail out of under and slightly over-exposed areas in high contrast images, allowing you to get the very best from the A65's superb sensor.
SLT A65

Overall

8.6 Out of 10
8.5 Out of 10

Specifications Full list of technical specs

sensor

SLT A65  vs
Pentax K-x 
Type CMOS CMOS
Megapixels 24 MP 12.2 MP
Resolution 6000 x 4000 4288 x 2848
Size APS-C APS-C
Area 23.5 x 15.6 mm 23.6 x 15.8 mm
Crop factor 1.5x 1.5x
Pixel size 15.3 microns 30.5 microns
Light sensitivity 100 ISO to 16,000 ISO 200 ISO to 6,400 ISO
Light sensitivity (Boost) 16,000 ISO to 25,600 ISO 6,400 ISO to 12,800 ISO
Codecs
RAW
JPEG
Self cleaning sensor Yes Yes
Tested vertical resolution 3,000 LPH 2,600 LPH
Tested horizontal resolution 3,000 LPH 2,600 LPH

focus system

Type Phase detection Phase detection
Focus points 15 11
Cross type focus points 3 9
Supports continuous No No

shutter

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

form factor

Size 132 x 97 x 81 mm 123 x 92 x 68 mm
Thickness 81 mm 68 mm
Weight 622 g 580 g
Is weather sealed No No

features

Is a smart camera No No
Includes a GPS Yes No
Supports HDR Yes Yes
Automatic panorama Yes No
Create realistic 3D images Yes No
Image stabilization
Sensor shift

video

SLT A65  vs
Pentax K-x 
Video 1920 x 1080 @ 60 fps 1280 x 720 @ 24 fps
Shoots video in 24p Yes Yes
Shoots high speed video No No
External mic jack 3.5mm None
Autofocus while shooting video Phase detection Manual
Autofocus type Phase detection N/A
Autofocus supports continuous Yes N/A

display

Type LCD LCD
Size 3" 2.7"
Resolution 921 k dots 230 k dots
Has a touch screen No No
Has a flip out screen Yes No
Supports live view Yes Yes

viewfinder

Viewfinder mirror Translucent Opaque
Viewfinder Yes Yes
Type Electronic Pentamirror
Coverage 100% 96%
Magnification 1.09x 0.85x
Viewfinder size 0.71x 0.56x

performance

Max continuous shooting 10 fps 4.7 fps
Battery life 510 420
Continuous shooting
10 fps, JPEG
4.7 fps, JPEG
Focus lag 138 ms 97 ms
Shutter lag 54 ms 82 ms
Startup delay 2,800 ms 600 ms
Sony SLT A65
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Pentax K-x
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