Pentax K-x vs Sony A550
69 Imaging
52 Features
47 Overall
50
63 Imaging
54 Features
65 Overall
58
Pentax K-x vs Sony A550 Key Specs
(Full Review)
- 12MP - APS-C Sensor
- 2.7" Fixed Screen
- ISO 100 - 6400 (Increase to 12800)
- Sensor based Image Stabilization
- 1/6000s Maximum Shutter
- 1280 x 720 video
- Pentax KAF2 Mount
- 580g - 123 x 92 x 68mm
- Announced December 2009
(Full Review)
- 14MP - APS-C Sensor
- 3" Tilting Display
- ISO 200 - 12800
- Sensor based Image Stabilization
- No Video
- Sony/Minolta Alpha Mount
- 632g - 137 x 104 x 84mm
- Announced December 2009
- Older Model is Sony A100
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Here is a comprehensive comparison of the Pentax K-x and Sony A550, both Entry-Level DSLR digital cameras by manufacturers Pentax and Sony. The image resolution of the K-x (12MP) and the A550 (14MP) is fairly similar and they come with the same exact sensor size (APS-C).
Apple Innovates by Creating Next-Level Optical Stabilization for iPhoneThe K-x was unveiled around the same time to the A550 so they are both of a similar generation. Both cameras offer the identical body type (Compact SLR).
Before we go through a more detailed comparison, below is a brief overview of how the K-x scores vs the A550 in relation to portability, imaging, features and an overall rating.
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Here is a sample of the gallery pictures for Pentax K-x and Sony Alpha DSLR-A550. The full galleries are available at Pentax K-x Gallery and Sony A550 Gallery.
Reasons to pick Pentax K-x over the Sony A550
| K-x | A550 |
|---|
Reasons to pick Sony A550 over the Pentax K-x
| A550 | K-x | |||
|---|---|---|---|---|
| Display type | Tilting |  | Fixed | Tilting display |
| Display sizing | 3" |  | 2.7" | Larger display (+0.3") |
| Display resolution | 922k |  | 230k | Crisper display (+692k dot) |
Common features in the Pentax K-x and Sony A550
| K-x | A550 | |||
|---|---|---|---|---|
| Announced | December 2009 |  | December 2009 | Similar generation |
| Focus manually |  | Dial precise focus | ||
| Selfie screen |  | Neither features selfie screen | ||
| Touch display |  | Neither features Touch display |
Pentax K-x vs Sony A550 Physical Comparison
In case you're aiming to carry your camera often, you will want to factor its weight and dimensions. The Pentax K-x enjoys exterior measurements of 123mm x 92mm x 68mm (4.8" x 3.6" x 2.7") and a weight of 580 grams (1.28 lbs) whilst the Sony A550 has dimensions of 137mm x 104mm x 84mm (5.4" x 4.1" x 3.3") accompanied by a weight of 632 grams (1.39 lbs).
Check out the Pentax K-x and Sony A550 in the new Camera with Lens Size Comparison Tool.
Always remember, the weight of an Interchangeable Lens Camera will vary depending on the lens you are utilising at that time. Underneath is the front view size comparison of the K-x against the A550.
Taking into consideration size and weight, the portability grade of the K-x and A550 is 69 and 63 respectively.
Pentax K-x vs Sony A550 Sensor Comparison
Usually, it is very tough to visualize the gap between sensor sizing merely by going over specifications. The photograph here will help give you a stronger sense of the sensor measurements in the K-x and A550.
To sum up, each of these cameras offer the same exact sensor sizing but different MP. You should anticipate the Sony A550 to deliver more detail having an extra 2 Megapixels. Greater resolution will let you crop pics a little more aggressively.
Pentax K-x vs Sony A550 Screen and ViewFinder
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Pentax K-x vs Sony A550 Specifications
| Pentax K-x | Sony Alpha DSLR-A550 | |
|---|---|---|
| General Information | ||
| Make | Pentax | Sony |
| Model type | Pentax K-x | Sony Alpha DSLR-A550 |
| Category | Entry-Level DSLR | Entry-Level DSLR |
| Announced | 2009-12-23 | 2009-12-09 |
| Body design | Compact SLR | Compact SLR |
| Sensor Information | ||
| Processor | Prime | Bionz |
| Sensor type | CMOS | CMOS |
| Sensor size | APS-C | APS-C |
| Sensor dimensions | 23.6 x 15.8mm | 23.4 x 15.6mm |
| Sensor surface area | 372.9mm² | 365.0mm² |
| Sensor resolution | 12 megapixel | 14 megapixel |
| Anti alias filter | ||
| Aspect ratio | 3:2 | 3:2 and 16:9 |
| Maximum resolution | 4288 x 2848 | 4592 x 3056 |
| Maximum native ISO | 6400 | 12800 |
| Maximum boosted ISO | 12800 | - |
| Lowest native ISO | 100 | 200 |
| RAW data | ||
| Autofocusing | ||
| Manual focusing | ||
| AF touch | ||
| Continuous AF | ||
| Single AF | ||
| AF tracking | ||
| AF selectice | ||
| Center weighted AF | ||
| AF multi area | ||
| Live view AF | ||
| Face detection focusing | ||
| Contract detection focusing | ||
| Phase detection focusing | ||
| Total focus points | 11 | 9 |
| Lens | ||
| Lens mount type | Pentax KAF2 | Sony/Minolta Alpha |
| Available lenses | 151 | 143 |
| Focal length multiplier | 1.5 | 1.5 |
| Screen | ||
| Range of screen | Fixed Type | Tilting |
| Screen sizing | 2.7 inches | 3 inches |
| Resolution of screen | 230 thousand dot | 922 thousand dot |
| Selfie friendly | ||
| Liveview | ||
| Touch operation | ||
| Screen technology | TFT LCD monitor | - |
| Viewfinder Information | ||
| Viewfinder | Optical (pentamirror) | Optical (pentamirror) |
| Viewfinder coverage | 96% | 95% |
| Viewfinder magnification | 0.57x | 0.53x |
| Features | ||
| Slowest shutter speed | 30s | 30s |
| Maximum shutter speed | 1/6000s | 1/4000s |
| Continuous shooting speed | 5.0fps | 7.0fps |
| Shutter priority | ||
| Aperture priority | ||
| Manually set exposure | ||
| Exposure compensation | Yes | Yes |
| Custom WB | ||
| Image stabilization | ||
| Integrated flash | ||
| Flash distance | 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 |
| External flash | ||
| AEB | ||
| White balance bracketing | ||
| Maximum flash sync | 1/180s | 1/160s |
| Exposure | ||
| Multisegment exposure | ||
| Average exposure | ||
| Spot exposure | ||
| Partial exposure | ||
| AF area exposure | ||
| Center weighted exposure | ||
| Video features | ||
| Supported video resolutions | 1280 x 720 (24 fps), 640 x 416 (24 fps) | - |
| Maximum video resolution | 1280x720 | None |
| Video format | Motion JPEG | - |
| Mic 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 lbs) | 632 gr (1.39 lbs) |
| Dimensions | 123 x 92 x 68mm (4.8" x 3.6" x 2.7") | 137 x 104 x 84mm (5.4" x 4.1" x 3.3") |
| DXO scores | ||
| DXO All around rating | 72 | 66 |
| DXO Color Depth rating | 22.8 | 21.9 |
| DXO Dynamic range rating | 12.5 | 11.8 |
| DXO Low light rating | 811 | 807 |
| Other | ||
| Battery life | 1900 photos | 480 photos |
| Style of battery | Battery Pack | Battery Pack |
| Battery ID | 4 x AA | NP-FM500H |
| Self timer | Yes (2 or 12 sec) | Yes (2 or 10 sec) |
| Time lapse feature | ||
| Storage media | SD/SDHC card | SD/ SDHC, Memory Stick Pro Duo/ Pro-HG Duo |
| Storage slots | 1 | 1 |
| Launch pricing | $600 | $749 |