Pentax K20D vs Sony A77
59 Imaging
53 Features
52 Overall
52
59 Imaging
63 Features
83 Overall
71
Pentax K20D vs Sony A77 Key Specs
(Full Review)
- 15MP - APS-C Sensor
- 2.7" Fixed Screen
- ISO 100 - 3200 (Boost to 6400)
- Sensor based Image Stabilization
- No Video
- Pentax KAF2 Mount
- 800g - 142 x 101 x 70mm
- Revealed June 2008
- Superseded the Pentax K10D
(Full Review)
- 24MP - APS-C Sensor
- 3" Fully Articulated Screen
- ISO 50 - 16000 (Raise to 25600)
- Sensor based Image Stabilization
- 1/8000s Max Shutter
- 1920 x 1080 video
- Sony/Minolta Alpha Mount
- 732g - 143 x 104 x 81mm
- Announced October 2011
- Old Model is Sony A700
- New Model is Sony A77 II
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Following is a thorough assessment of the Pentax K20D vs Sony A77, both Advanced DSLR cameras by brands Pentax and Sony. There exists a sizeable gap among the image resolutions of the K20D (15MP) and A77 (24MP) but they feature the exact same sensor size (APS-C).
Samsung Releases Faster Versions of EVO MicroSD CardsThe K20D was launched 4 years earlier than the A77 which is a fairly large gap as far as camera technology is concerned. Each of these cameras come with the identical body type (Mid-size SLR).
Before diving in to a more detailed comparison, below is a brief introduction of how the K20D scores against the A77 when it comes to portability, imaging, features and an overall score.
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Here is a preview of the gallery images for Pentax K20D and Sony SLT-A77. The complete galleries are provided at Pentax K20D Gallery and Sony A77 Gallery.
Reasons to pick Pentax K20D over the Sony A77
| K20D | A77 |
|---|
Reasons to pick Sony A77 over the Pentax K20D
| A77 | K20D | |||
|---|---|---|---|---|
| Announced | October 2011 |  | June 2008 | More modern by 40 months |
| Screen type | Fully Articulated |  | Fixed | Fully Articulating screen |
| Screen dimension | 3" |  | 2.7" | Bigger screen (+0.3") |
| Screen resolution | 921k |  | 230k | Sharper screen (+691k dot) |
| Selfie screen |  | Easy selfies |
Common features in the Pentax K20D and Sony A77
| K20D | A77 | |||
|---|---|---|---|---|
| Focus manually |  | Very accurate focusing | ||
| Touch screen |  | Lacking Touch screen |
Pentax K20D vs Sony A77 Physical Comparison
When you are looking to carry around your camera frequently, you should factor its weight and size. The Pentax K20D features outer measurements of 142mm x 101mm x 70mm (5.6" x 4.0" x 2.8") with a weight of 800 grams (1.76 lbs) and the Sony A77 has specifications of 143mm x 104mm x 81mm (5.6" x 4.1" x 3.2") having a weight of 732 grams (1.61 lbs).
See the Pentax K20D vs Sony A77 in the latest Camera and Lens Size Comparison Tool.
Take into account, the weight of an Interchangeable Lens Camera will change dependant on the lens you use at the time. Here is the front view scale comparison of the K20D vs the A77.
Looking at dimensions and weight, the portability score of the K20D and A77 is 59 and 59 respectively.
Pentax K20D vs Sony A77 Sensor Comparison
Sometimes, it is very tough to envision the contrast in sensor sizes purely by looking through technical specs. The picture underneath may provide you a greater sense of the sensor sizing in the K20D and A77.
As you can tell, both the cameras posses the exact same sensor measurements albeit not the same MP. You should expect the Sony A77 to render more detail utilizing its extra 9MP. Higher resolution will make it easier to crop pictures somewhat more aggressively. The more aged K20D will be behind when it comes to sensor innovation.
Pentax K20D vs Sony A77 Screen and ViewFinder
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Pentax K20D vs Sony A77 Specifications
| Pentax K20D | Sony SLT-A77 | |
|---|---|---|
| General Information | ||
| Brand | Pentax | Sony |
| Model type | Pentax K20D | Sony SLT-A77 |
| Category | Advanced DSLR | Advanced DSLR |
| Revealed | 2008-06-25 | 2011-10-25 |
| Body design | Mid-size SLR | Mid-size SLR |
| Sensor Information | ||
| Processor | - | Bionz |
| Sensor type | CMOS | CMOS |
| Sensor size | APS-C | APS-C |
| Sensor measurements | 23.4 x 15.6mm | 23.5 x 15.6mm |
| Sensor surface area | 365.0mm² | 366.6mm² |
| Sensor resolution | 15MP | 24MP |
| Anti alias filter | ||
| Aspect ratio | 3:2 | 3:2 and 16:9 |
| Peak resolution | 4672 x 3104 | 6000 x 4000 |
| Highest native ISO | 3200 | 16000 |
| Highest enhanced ISO | 6400 | 25600 |
| Minimum native ISO | 100 | 50 |
| RAW images | ||
| Autofocusing | ||
| Focus manually | ||
| Touch to focus | ||
| Continuous autofocus | ||
| Single autofocus | ||
| Tracking autofocus | ||
| Selective autofocus | ||
| Center weighted autofocus | ||
| Autofocus multi area | ||
| Autofocus live view | ||
| Face detection autofocus | ||
| Contract detection autofocus | ||
| Phase detection autofocus | ||
| Total focus points | 11 | 19 |
| Cross type focus points | - | 11 |
| Lens | ||
| Lens mount type | Pentax KAF2 | Sony/Minolta Alpha |
| Available lenses | 151 | 143 |
| Crop factor | 1.5 | 1.5 |
| Screen | ||
| Screen type | Fixed Type | Fully Articulated |
| Screen sizing | 2.7" | 3" |
| Screen resolution | 230k dot | 921k dot |
| Selfie friendly | ||
| Liveview | ||
| Touch functionality | ||
| Viewfinder Information | ||
| Viewfinder type | Optical (pentaprism) | Electronic |
| Viewfinder resolution | - | 2,359k dot |
| Viewfinder coverage | 95 percent | 100 percent |
| Viewfinder magnification | 0.64x | 0.73x |
| Features | ||
| Min shutter speed | 30s | 30s |
| Max shutter speed | 1/4000s | 1/8000s |
| Continuous shutter speed | 3.0fps | 12.0fps |
| Shutter priority | ||
| Aperture priority | ||
| Expose Manually | ||
| Exposure compensation | Yes | Yes |
| Change white balance | ||
| Image stabilization | ||
| Built-in flash | ||
| Flash distance | 13.00 m (at ISO 100) | 12.00 m |
| Flash options | Auto, Red-Eye, Slow, Red-Eye Slow, Rear curtain, wireless | Auto, On, Off, Red-Eye, Slow Sync, High Speed Sync, Rear Curtain, Fill-in, Wireless |
| External flash | ||
| AE bracketing | ||
| White balance bracketing | ||
| Max flash sync | 1/180s | 1/250s |
| Exposure | ||
| Multisegment exposure | ||
| Average exposure | ||
| Spot exposure | ||
| Partial exposure | ||
| AF area exposure | ||
| Center weighted exposure | ||
| Video features | ||
| Video resolutions | - | 1920 x 1080 (60, 24 fps), 1440 x 1080 (30fps), 640 x 424 (29.97 fps) |
| Highest video resolution | None | 1920x1080 |
| Video data format | - | MPEG-4, AVCHD, H.264 |
| Microphone input | ||
| Headphone input | ||
| Connectivity | ||
| Wireless | None | Eye-Fi Connected |
| Bluetooth | ||
| NFC | ||
| HDMI | ||
| USB | USB 2.0 (480 Mbit/sec) | USB 2.0 (480 Mbit/sec) |
| GPS | None | BuiltIn |
| Physical | ||
| Environment seal | ||
| Water proofing | ||
| Dust proofing | ||
| Shock proofing | ||
| Crush proofing | ||
| Freeze proofing | ||
| Weight | 800g (1.76 lb) | 732g (1.61 lb) |
| Dimensions | 142 x 101 x 70mm (5.6" x 4.0" x 2.8") | 143 x 104 x 81mm (5.6" x 4.1" x 3.2") |
| DXO scores | ||
| DXO Overall rating | 65 | 78 |
| DXO Color Depth rating | 22.9 | 24.0 |
| DXO Dynamic range rating | 11.1 | 13.2 |
| DXO Low light rating | 639 | 801 |
| Other | ||
| Battery life | - | 470 shots |
| Type of battery | - | Battery Pack |
| Battery ID | D-LI50 | NP-FM500H |
| Self timer | Yes (2 or 10 sec) | Yes (2 or 10 sec) |
| Time lapse recording | ||
| Type of storage | SD/MMC/SDHC card | SD/SDHC/SDXC/Memory Stick Pro Duo/ Pro-HG Duo |
| Storage slots | 1 | 1 |
| Pricing at release | $700 | $900 |