Pentax K100D S vs Sony A57
65 Imaging
45 Features
38 Overall
42
64 Imaging
57 Features
85 Overall
68
Pentax K100D S vs Sony A57 Key Specs
(Full Review)
- 6MP - APS-C Sensor
- 2.5" Fixed Display
- ISO 200 - 3200
- Sensor based Image Stabilization
- No Video
- Pentax KAF2 Mount
- 646g - 129 x 91 x 71mm
- Released June 2007
- Superseded the Pentax K100D
- New Model is Pentax K200D
(Full Review)
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Here is a comprehensive comparison of the Pentax K100D S vs Sony A57, both Entry-Level DSLR digital cameras by rivals Pentax and Sony. There is a sizeable difference between the image resolutions of the K100D S (6MP) and A57 (16MP) but both cameras have the same sensor sizing (APS-C).
Photography GlossaryThe K100D S was revealed 6 years prior to the A57 and that is quite a large gap as far as tech is concerned. Each of the cameras have the same body design (Compact SLR).
Before delving right into a more detailed comparison, here is a simple view of how the K100D S grades vs the A57 in the way of portability, imaging, features and an overall rating.
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This is a sample of the gallery pics for Pentax K100D Super and Sony SLT-A57. The full galleries are viewable at Pentax K100D S Gallery and Sony A57 Gallery.
Reasons to pick Pentax K100D S over the Sony A57
| K100D S | A57 |
|---|
Reasons to pick Sony A57 over the Pentax K100D S
| A57 | K100D S | |||
|---|---|---|---|---|
| Released | September 2012 |  | June 2007 | Fresher by 63 months |
| Display type | Fully Articulated |  | Fixed | Fully Articulating display |
| Display dimensions | 3" |  | 2.5" | Larger display (+0.5") |
| Display resolution | 921k |  | 210k | Crisper display (+711k dot) |
| Selfie screen |  | Take selfies |
Common features in the Pentax K100D S and Sony A57
| K100D S | A57 | |||
|---|---|---|---|---|
| Manually focus |  | More exact focus | ||
| Touch friendly display |  | No Touch friendly display |
Pentax K100D S vs Sony A57 Physical Comparison
For anybody who is going to carry your camera, you'll need to factor its weight and volume. The Pentax K100D S provides exterior dimensions of 129mm x 91mm x 71mm (5.1" x 3.6" x 2.8") along with a weight of 646 grams (1.42 lbs) and the Sony A57 has sizing of 132mm x 98mm x 81mm (5.2" x 3.9" x 3.2") having a weight of 618 grams (1.36 lbs).
Compare the Pentax K100D S vs Sony A57 in the new Camera with Lens Size Comparison Tool.
Always remember, the weight of an Interchangeable Lens Camera will differ depending on the lens you are using at that moment. Underneath is a front view measurement comparison of the K100D S compared to the A57.
Factoring in size and weight, the portability grade of the K100D S and A57 is 65 and 64 respectively.
Pentax K100D S vs Sony A57 Sensor Comparison
Usually, it can be hard to picture the gap between sensor sizing just by checking specs. The graphic underneath should offer you a better sense of the sensor sizes in the K100D S and A57.
All in all, each of these cameras have the same sensor dimensions but different megapixels. You should expect to see the Sony A57 to give you more detail because of its extra 10MP. Greater resolution can also help you crop images a bit more aggressively. The older K100D S is going to be disadvantaged with regard to sensor technology.
Pentax K100D S vs Sony A57 Screen and ViewFinder
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Pentax K100D S vs Sony A57 Specifications
| Pentax K100D Super | Sony SLT-A57 | |
|---|---|---|
| General Information | ||
| Make | Pentax | Sony |
| Model | Pentax K100D Super | Sony SLT-A57 |
| Class | Entry-Level DSLR | Entry-Level DSLR |
| Released | 2007-06-28 | 2012-09-13 |
| Physical type | Compact SLR | Compact SLR |
| Sensor Information | ||
| Sensor type | CCD | CMOS |
| Sensor size | APS-C | APS-C |
| Sensor dimensions | 23.5 x 15.7mm | 23.5 x 15.6mm |
| Sensor surface area | 369.0mm² | 366.6mm² |
| Sensor resolution | 6MP | 16MP |
| Anti aliasing filter | ||
| Aspect ratio | 3:2 | 3:2 and 16:9 |
| Max resolution | 3008 x 2008 | 4912 x 3264 |
| Max native ISO | 3200 | 16000 |
| Max enhanced ISO | - | 25600 |
| Minimum native ISO | 200 | 100 |
| RAW pictures | ||
| Autofocusing | ||
| Focus manually | ||
| Touch to focus | ||
| Continuous AF | ||
| AF single | ||
| AF tracking | ||
| AF selectice | ||
| Center weighted AF | ||
| AF multi area | ||
| Live view AF | ||
| Face detect AF | ||
| Contract detect AF | ||
| Phase detect AF | ||
| Number of focus points | 11 | 15 |
| Cross focus points | - | 3 |
| Lens | ||
| Lens mount | Pentax KAF2 | Sony/Minolta Alpha |
| Number of lenses | 151 | 143 |
| Focal length multiplier | 1.5 | 1.5 |
| Screen | ||
| Type of display | Fixed Type | Fully Articulated |
| Display diagonal | 2.5" | 3" |
| Display resolution | 210k dots | 921k dots |
| Selfie friendly | ||
| Liveview | ||
| Touch capability | ||
| Display technology | - | Xtra Fine TFT drive with TruBlack technology |
| Viewfinder Information | ||
| Viewfinder type | Optical (pentamirror) | Electronic |
| Viewfinder resolution | - | 1,440k dots |
| Viewfinder coverage | 96 percent | 100 percent |
| Viewfinder magnification | 0.57x | 0.7x |
| Features | ||
| Min shutter speed | 30s | 30s |
| Max shutter speed | 1/4000s | 1/4000s |
| Continuous shutter rate | 3.0fps | 12.0fps |
| Shutter priority | ||
| Aperture priority | ||
| Manual mode | ||
| Exposure compensation | Yes | Yes |
| Custom WB | ||
| Image stabilization | ||
| Integrated flash | ||
| Flash range | - | 10.00 m (@ ISO 100) |
| Flash options | Auto, On, Off, Red-eye reduction | Auto, On, Off, Red-Eye, Slow Sync, High Speed Sync, Rear Curtain, Fill-in, Wireless |
| External flash | ||
| AE bracketing | ||
| White balance bracketing | ||
| Max flash synchronize | 1/180s | 1/160s |
| Exposure | ||
| Multisegment | ||
| Average | ||
| Spot | ||
| Partial | ||
| AF area | ||
| Center weighted | ||
| Video features | ||
| Supported video resolutions | - | 1920 x 1080 (60p, 24p), 1440 x 1080 (30p), 640 x 480 (30 fps) |
| Max video resolution | None | 1920x1080 |
| Video format | - | MPEG-4, AVCHD, H.264 |
| Mic port | ||
| Headphone port | ||
| 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 sealing | ||
| Water proof | ||
| Dust proof | ||
| Shock proof | ||
| Crush proof | ||
| Freeze proof | ||
| Weight | 646 gr (1.42 lbs) | 618 gr (1.36 lbs) |
| Physical dimensions | 129 x 91 x 71mm (5.1" x 3.6" x 2.8") | 132 x 98 x 81mm (5.2" x 3.9" x 3.2") |
| DXO scores | ||
| DXO Overall score | not tested | 75 |
| DXO Color Depth score | not tested | 23.4 |
| DXO Dynamic range score | not tested | 13.0 |
| DXO Low light score | not tested | 785 |
| Other | ||
| Battery life | - | 550 photographs |
| Battery type | - | Battery Pack |
| Battery model | 4 x AA | NP-FM500H |
| Self timer | Yes (2 or 12 sec) | Yes (2 or 10 sec) |
| Time lapse feature | ||
| Storage type | SD/SDHC card | SD/SDHC/SDXC/Memory Stick Pro Duo/ Pro-HG Duo |
| Card slots | 1 | 1 |
| Retail cost | $520 | $1,000 |