Pentax K20D vs Sony A9 II
59 Imaging
53 Features
52 Overall
52
62 Imaging
74 Features
93 Overall
81
Pentax K20D vs Sony A9 II Key Specs
(Full Review)
- 15MP - APS-C Sensor
- 2.7" Fixed Display
- ISO 100 - 3200 (Expand to 6400)
- Sensor based Image Stabilization
- No Video
- Pentax KAF2 Mount
- 800g - 142 x 101 x 70mm
- Revealed June 2008
- Replaced the Pentax K10D
(Full Review)
- 24MP - Full frame Sensor
- 3" Tilting Screen
- ISO 100 - 51200 (Increase to 204800)
- Sensor based 5-axis Image Stabilization
- 1/8000s Maximum Shutter
- 3840 x 2160 video
- Sony E Mount
- 678g - 129 x 96 x 76mm
- Revealed October 2019
- Superseded the Sony A9
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Below is a extensive assessment of the Pentax K20D and Sony A9 II, former being a Advanced DSLR while the latter is a Pro Mirrorless by companies Pentax and Sony. There exists a sizable gap between the sensor resolutions of the K20D (15MP) and A9 II (24MP) and the K20D (APS-C) and A9 II (Full frame) possess different sensor size.
Japan-exclusive Leica Leitz Phone 3 features big sensor and new modesThe K20D was unveiled 12 years earlier than the A9 II and that is quite a significant difference as far as technology is concerned. The two cameras come with different body type with the Pentax K20D being a Mid-size SLR camera and the Sony A9 II being a SLR-style mirrorless camera.
Before going through a detailed comparison, below is a quick introduction of how the K20D scores versus the A9 II with regard to portability, imaging, features and an overall grade.
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Following is a preview of the gallery photos for Pentax K20D & Sony Alpha A9 Mark II. The full galleries are available at Pentax K20D Gallery & Sony A9 II Gallery.
Reasons to pick Pentax K20D over the Sony A9 II
| K20D | A9 II |
|---|
Reasons to pick Sony A9 II over the Pentax K20D
| A9 II | K20D | |||
|---|---|---|---|---|
| Revealed | October 2019 | June 2008 | More recent by 137 months | |
| Screen type | Tilting | Fixed | Tilting screen | |
| Screen dimension | 3" | 2.7" | Bigger screen (+0.3") | |
| Screen resolution | 1440k | 230k | Sharper screen (+1210k dot) | |
| Touch friendly screen | Quickly navigate |
Common features in the Pentax K20D and Sony A9 II
| K20D | A9 II | |||
|---|---|---|---|---|
| Manually focus | Dial accurate focus | |||
| Selfie screen | Neither contains selfie screen |
Pentax K20D vs Sony A9 II Physical Comparison
When you are going to lug around your camera regularly, you are going to need to take into account its weight and measurements. The Pentax K20D has got exterior dimensions of 142mm x 101mm x 70mm (5.6" x 4.0" x 2.8") having a weight of 800 grams (1.76 lbs) while the Sony A9 II has proportions of 129mm x 96mm x 76mm (5.1" x 3.8" x 3.0") having a weight of 678 grams (1.49 lbs).
Analyze the Pentax K20D and Sony A9 II in our newest Camera plus Lens Size Comparison Tool.
Keep in mind, the weight of an ILC will vary dependant on the lens you are employing at the time. Here is the front view measurement comparison of the K20D against the A9 II.

Looking at dimensions and weight, the portability score of the K20D and A9 II is 59 and 62 respectively.
Pentax K20D vs Sony A9 II Sensor Comparison
Normally, it can be difficult to imagine the contrast between sensor measurements purely by going over specs. The visual below will offer you a more clear sense of the sensor dimensions in the K20D and A9 II.
All in all, each of the cameras posses different megapixel count and different sensor measurements. The K20D having a tinier sensor is going to make shooting bokeh more challenging and the Sony A9 II will offer you extra detail having an extra 9MP. Higher resolution will enable you to crop photographs somewhat more aggressively. The older K20D is going to be disadvantaged in sensor tech.
Pentax K20D vs Sony A9 II Screen and ViewFinder
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Pentax K20D vs Sony A9 II Specifications
| Pentax K20D | Sony Alpha A9 Mark II | |
|---|---|---|
| General Information | ||
| Manufacturer | Pentax | Sony |
| Model type | Pentax K20D | Sony Alpha A9 Mark II |
| Class | Advanced DSLR | Pro Mirrorless |
| Revealed | 2008-06-25 | 2019-10-03 |
| Physical type | Mid-size SLR | SLR-style mirrorless |
| Sensor Information | ||
| Processor Chip | - | BIONZ X |
| Sensor type | CMOS | BSI-CMOS |
| Sensor size | APS-C | Full frame |
| Sensor dimensions | 23.4 x 15.6mm | 35.6 x 23.8mm |
| Sensor surface area | 365.0mm² | 847.3mm² |
| Sensor resolution | 15MP | 24MP |
| Anti alias filter | ||
| Aspect ratio | 3:2 | 3:2 |
| Highest resolution | 4672 x 3104 | 6000 x 4000 |
| Highest native ISO | 3200 | 51200 |
| Highest boosted ISO | 6400 | 204800 |
| Minimum native ISO | 100 | 100 |
| RAW photos | ||
| Minimum boosted ISO | - | 50 |
| Autofocusing | ||
| Focus manually | ||
| Touch to focus | ||
| Continuous AF | ||
| Single AF | ||
| AF tracking | ||
| AF selectice | ||
| AF center weighted | ||
| AF multi area | ||
| Live view AF | ||
| Face detect focusing | ||
| Contract detect focusing | ||
| Phase detect focusing | ||
| Total focus points | 11 | 693 |
| Lens | ||
| Lens support | Pentax KAF2 | Sony E |
| Total lenses | 151 | 121 |
| Focal length multiplier | 1.5 | 1 |
| Screen | ||
| Display type | Fixed Type | Tilting |
| Display size | 2.7" | 3" |
| Resolution of display | 230 thousand dots | 1,440 thousand dots |
| Selfie friendly | ||
| Liveview | ||
| Touch friendly | ||
| Viewfinder Information | ||
| Viewfinder type | Optical (pentaprism) | Electronic |
| Viewfinder resolution | - | 3,686 thousand dots |
| Viewfinder coverage | 95% | 100% |
| Viewfinder magnification | 0.64x | 0.78x |
| Features | ||
| Lowest shutter speed | 30 secs | 30 secs |
| Highest shutter speed | 1/4000 secs | 1/8000 secs |
| Highest quiet shutter speed | - | 1/32000 secs |
| Continuous shooting rate | 3.0 frames/s | 20.0 frames/s |
| Shutter priority | ||
| Aperture priority | ||
| Expose Manually | ||
| Exposure compensation | Yes | Yes |
| Custom WB | ||
| Image stabilization | ||
| Inbuilt flash | ||
| Flash distance | 13.00 m (at ISO 100) | no built-in flash |
| Flash settings | Auto, Red-Eye, Slow, Red-Eye Slow, Rear curtain, wireless | Flash off, Autoflash, Fill-flash, Slow Sync., Rear Sync., Red-eye reduction, Wireless, Hi-speed sync |
| External flash | ||
| Auto exposure bracketing | ||
| White balance bracketing | ||
| Highest flash synchronize | 1/180 secs | - |
| Exposure | ||
| Multisegment exposure | ||
| Average exposure | ||
| Spot exposure | ||
| Partial exposure | ||
| AF area exposure | ||
| Center weighted exposure | ||
| Video features | ||
| Video resolutions | - | 3840 x 2160 @ 30p / 100 Mbps, XAVC S, MP4, H.264, Linear PCM |
| Highest video resolution | None | 3840x2160 |
| Video file format | - | MPEG-4, AVCHD, H.264 |
| Mic port | ||
| Headphone port | ||
| Connectivity | ||
| Wireless | None | Built-In |
| Bluetooth | ||
| NFC | ||
| HDMI | ||
| USB | USB 2.0 (480 Mbit/sec) | USB 3.1 Gen 1 (5 GBit/sec) |
| GPS | None | None |
| Physical | ||
| Environmental sealing | ||
| Water proofing | ||
| Dust proofing | ||
| Shock proofing | ||
| Crush proofing | ||
| Freeze proofing | ||
| Weight | 800 gr (1.76 lb) | 678 gr (1.49 lb) |
| Dimensions | 142 x 101 x 70mm (5.6" x 4.0" x 2.8") | 129 x 96 x 76mm (5.1" x 3.8" x 3.0") |
| DXO scores | ||
| DXO All around rating | 65 | not tested |
| DXO Color Depth rating | 22.9 | not tested |
| DXO Dynamic range rating | 11.1 | not tested |
| DXO Low light rating | 639 | not tested |
| Other | ||
| Battery life | - | 690 pictures |
| Type of battery | - | Battery Pack |
| Battery ID | D-LI50 | NP-FZ100 |
| Self timer | Yes (2 or 10 sec) | Yes (2, 5, 10 secs + continuous, 3 or 5 frames) |
| Time lapse recording | ||
| Type of storage | SD/MMC/SDHC card | Dual SD/SDHC/SDXC slots (UHS-II compatible) |
| Card slots | Single | 2 |
| Price at launch | $700 | $4,498 |