Sony SLT-A57 with Pentax K-x Overview
Let's compare Pentax K-x with Sony SLT-A57.
These models are included in the Entry-Level DSLR cameras.
Pentax K-x was released in 2009, and Sony A57 in 2012.
SLT-A57 is newer, which is a plus. K-x 3 years older.
The sensor resolution of K-x is greater than that of SLT-A57. However, the difference of 4 MP is not very significant.
The more megapixels the camera has, the more detailed and clear the picture will be. The number of megapixels will also affect the maximum size of the photos, which then can be printed without loss of quality.
The minimum ISO value for these cameras is the same and is .
A larger maximum ISO allows you to take good pictures in the dark.
The maximum ISO value for these cameras is the same and is .
Both cameras have Sensor-shift image stabilization.
Sony A57 has a larger 3-inch Articulated screen, the other camera has a 2-inch Fixed screen.
K-x has optical (pentamirror) viewfinder, and the SLT-A57 doesn’t have.
Viewfinder SLT-A57 has a higher resolution of 1440k dots, K-x has a resolution of no electronic viewfinderk dots.
Burst mode, also called continuous shooting mode, sports mode or continuous high speed mode, is a shooting mode in still cameras. Pentax K-x has 12.0 fps continuous shooting.
Pentax K-x has 12.0 fps continuous shooting.
| General |
K-x |
SLT-A57 |
| Brand |
Pentax
|
Sony
|
| Model |
K-x |
SLT-A57 |
| Announced |
December, 2009 |
September, 2012 |
| Body Type |
Compact SLR |
Compact SLR |
| Lens |
| Lens Mount |
Pentax KAF2 |
Sony/Minolta Alpha |
| Manual Focus |
|
|
| Focal Lens Multiplier |
1.5 |
1.5 |
| Number of Lenses |
150 |
143 |
| Macro Focus Range |
n/a |
n/a |
| Screen |
| Screen Size |
2" |
3" |
| Screen Type |
Fixed |
Articulated |
| Screen Resolution |
230k pixels |
921k pixels |
| Touch Screen |
|
|
| Live View |
|
|
| Viewfinder |
| Viewfinder |
Optical (pentamirror) |
Electronic |
| Viewfinder Resolution |
no electronic viewfinder |
| Viewfinder Coverage |
96% |
100% |
| Viewfinder Magnification |
0.57 |
0.7 |
| Autofocus |
| AF Touch |
|
|
| AF Continuous |
|
|
| AF Single |
|
|
| AF Tracking |
|
|
| AF Selective |
|
|
| AF Center |
|
|
| AF Multi Area |
|
|
| AF Live View |
|
|
| AF Face Detection |
|
|
| AF Contrast Detection |
|
|
| AF Phase Detection |
|
|
| Number of Focus Points |
11 |
15 |
| Number of Cross Focus Points |
0 |
3 |
| Photography Features |
| RAW Support |
|
|
| Min Shutter Speed |
1/30 sec |
1/30 sec |
| Max Shutter Speed |
1/6000 sec |
1/4000 sec |
| Continuous Shooting |
5.0 fps |
12.0 fps |
| Shutter Priority |
|
|
| Aperture Priority |
|
|
| Manual Exposure Mode |
|
|
| Exposure Compensation |
|
|
| Custom White Balance |
|
|
| Image Stabilization |
|
|
| Built-in Flash |
|
|
| Flash Range |
16.00 |
10.00 |
| Flash Modes |
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 |
|
|
| AE Bracketing |
|
|
| AE Bracketing Range |
±3 EV |
±3 EV |
| WB Bracketing |
|
|
| Sensor |
| Sensor Size |
APS-C |
APS-C |
| Sensor Type |
CMOS |
CMOS |
| Sensor Dimensions |
23.6 x 15.8 mm |
23.5 x 15.6 mm |
| Sensor Area |
372.9 mm² |
366.6 mm² |
| Sensor Resolution |
12 MP |
16 MP |
| Max Image Resolution |
4288 x 2848 |
4912 x 3264 |
| Max Native ISO |
6400 |
16000 |
| Min Native ISO |
100 |
100 |
| Max Boosted ISO |
12800 |
25600 |
| Min Boosted ISO |
0 |
0 |
| Video Features |
| 4K |
|
|
| Max Video Resolution |
1280 x 720 |
1920 x 1080 |
| Video Formats |
Motion JPEG |
MPEG-4, AVCHD, H.264 |
| Timelapse Recording |
|
|
| Microphone Port |
|
|
| Headphone Port |
|
|
| Exposure Modes |
| Multi-Segment |
|
|
| Average |
|
|
| Spot |
|
|
| Partial |
|
|
| AF-Area |
|
|
| Center Weighted |
|
|
| Connectivity |
| GPS |
None |
None |
| Wireless Connectivity |
Built-In |
Built-In |
| Bluetooth |
|
|
| HDMI |
|
|
| USB |
USB 2.0 (480 Mbit/sec) |
USB 2.0 (480 Mbit/sec) |
| Battery |
| Battery Life |
1900 shots |
550 shots |
| Battery Type |
Battery Pack |
Battery Pack |
| Battery Model |
4 x AA |
NP-FM500H |
| Physical |
| Weight |
580 g |
618 g |
| Physical Dimensions |
123 x 92 x 68 mm |
132 x 98 x 81 mm |
| Environmental Sealing |
|
|
| Water Proof |
|
|
| Dust Proof |
|
|
| Shock Proof |
|
|
| Crush Proof |
|
|
| Freeze Proof |
|
|
| Shock Proof |
|
|
| Storage |
| Storage Type |
SD/SDHC card |
SD/SDHC/SDXC/Memory Stick Pro Duo/ Pro-HG Duo |
| Storage Slots |
1 |
1 |
| Other Features |
| Self Timer |
|
|
| Selfie Friendly |
|
|
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