Pentax K-r vs Sony A7 III
67 Imaging
52 Features
52 Overall
52
63 Imaging
72 Features
92 Overall
80
Pentax K-r vs Sony A7 III Key Specs
(Full Review)
- 12MP - APS-C Sensor
- 3" Fixed Screen
- ISO 200 - 12800 (Raise to 25600)
- Sensor based Image Stabilization
- 1/6000s Max Shutter
- 1280 x 720 video
- Pentax KAF2 Mount
- 598g - 125 x 97 x 68mm
- Announced March 2011
(Full Review)
- 24MP - Full frame Sensor
- 3" Tilting Display
- ISO 100 - 51200 (Push to 204800)
- Sensor based 5-axis Image Stabilization
- 1/8000s Max Shutter
- 3840 x 2160 video
- Sony E Mount
- 650g - 127 x 96 x 74mm
- Introduced February 2018
- Old Model is Sony A7 II
- Newer Model is Sony A7 IV
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Let's look a little more in depth at the Pentax K-r and Sony A7 III, one is a Entry-Level DSLR and the other is a Pro Mirrorless by rivals Pentax and Sony. There exists a sizeable gap among the sensor resolutions of the K-r (12MP) and A7 III (24MP) and the K-r (APS-C) and A7 III (Full frame) possess different sensor size.
Pentax 17 Pre-Orders Outperform Expectations by a LandslideThe K-r was launched 8 years prior to the A7 III which is a fairly large gap as far as camera technology is concerned. Each of these cameras offer different body type with the Pentax K-r being a Compact SLR camera and the Sony A7 III being a SLR-style mirrorless camera.
Before going through a in depth comparison, below is a short summation of how the K-r matches up vs the A7 III when considering portability, imaging, features and an overall score.
Photography Glossary Pentax K-r vs Sony A7 III Gallery
Following is a sample of the gallery pics for Pentax K-r and Sony Alpha A7 III. The complete galleries are provided at Pentax K-r Gallery and Sony A7 III Gallery.
Reasons to pick Pentax K-r over the Sony A7 III
| K-r | A7 III |
|---|
Reasons to pick Sony A7 III over the Pentax K-r
| A7 III | K-r | |||
|---|---|---|---|---|
| Introduced | February 2018 | March 2011 | More modern by 84 months | |
| Display type | Tilting | Fixed | Tilting display | |
| Display resolution | 922k | 921k | Crisper display (+1k dot) | |
| Touch display | Easily navigate |
Common features in the Pentax K-r and Sony A7 III
| K-r | A7 III | |||
|---|---|---|---|---|
| Manually focus | Dial accurate focusing | |||
| Display sizing | 3" | 3" | Equivalent display size | |
| Selfie screen | Neither features selfie screen |
Pentax K-r vs Sony A7 III Physical Comparison
If you are planning to carry around your camera often, you're going to have to consider its weight and dimensions. The Pentax K-r enjoys external dimensions of 125mm x 97mm x 68mm (4.9" x 3.8" x 2.7") having a weight of 598 grams (1.32 lbs) while the Sony A7 III has dimensions of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") accompanied by a weight of 650 grams (1.43 lbs).
Check the Pentax K-r and Sony A7 III in the all new Camera with Lens Size Comparison Tool.
Always remember, the weight of an Interchangeable Lens Camera will differ dependant on the lens you are employing at that moment. Here is the front view measurements comparison of the K-r against the A7 III.

Using dimensions and weight, the portability grade of the K-r and A7 III is 67 and 63 respectively.
Pentax K-r vs Sony A7 III Sensor Comparison
Typically, its tough to visualize the difference in sensor sizes purely by looking through specifications. The image here will help give you a better sense of the sensor dimensions in the K-r and A7 III.
Plainly, both of those cameras enjoy different resolutions and different sensor sizes. The K-r due to its smaller sensor is going to make getting shallow DOF tougher and the Sony A7 III will result in greater detail utilizing its extra 12MP. Greater resolution can also help you crop pics far more aggressively. The more aged K-r will be behind in sensor technology.
Pentax K-r vs Sony A7 III Screen and ViewFinder
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Pentax K-r vs Sony A7 III Specifications
| Pentax K-r | Sony Alpha A7 III | |
|---|---|---|
| General Information | ||
| Brand Name | Pentax | Sony |
| Model | Pentax K-r | Sony Alpha A7 III |
| Category | Entry-Level DSLR | Pro Mirrorless |
| Announced | 2011-03-11 | 2018-02-27 |
| Physical type | Compact SLR | SLR-style mirrorless |
| Sensor Information | ||
| Powered by | Prime II | Bionz X |
| Sensor type | CMOS | BSI-CMOS |
| Sensor size | APS-C | Full frame |
| Sensor dimensions | 23.6 x 15.8mm | 35.8 x 23.8mm |
| Sensor area | 372.9mm² | 852.0mm² |
| Sensor resolution | 12MP | 24MP |
| Anti aliasing filter | ||
| Aspect ratio | 3:2 | 3:2 and 16:9 |
| Full resolution | 4288 x 2848 | 6000 x 4000 |
| Max native ISO | 12800 | 51200 |
| Max boosted ISO | 25600 | 204800 |
| Lowest native ISO | 200 | 100 |
| RAW data | ||
| Lowest boosted ISO | 100 | 50 |
| Autofocusing | ||
| Manual focus | ||
| Touch focus | ||
| Continuous autofocus | ||
| Single autofocus | ||
| Tracking autofocus | ||
| Selective autofocus | ||
| Center weighted autofocus | ||
| Autofocus multi area | ||
| Autofocus live view | ||
| Face detection focus | ||
| Contract detection focus | ||
| Phase detection focus | ||
| Number of focus points | 11 | 693 |
| Cross focus points | 9 | - |
| Lens | ||
| Lens mount | Pentax KAF2 | Sony E |
| Number of lenses | 151 | 121 |
| Crop factor | 1.5 | 1 |
| Screen | ||
| Type of screen | Fixed Type | Tilting |
| Screen size | 3" | 3" |
| Screen resolution | 921k dots | 922k dots |
| Selfie friendly | ||
| Liveview | ||
| Touch capability | ||
| Screen technology | TFT LCD monitor | - |
| Viewfinder Information | ||
| Viewfinder | Optical (pentamirror) | Electronic |
| Viewfinder resolution | - | 2,359k dots |
| Viewfinder coverage | 96 percent | 100 percent |
| Viewfinder magnification | 0.57x | 0.78x |
| Features | ||
| Lowest shutter speed | 30s | 30s |
| Highest shutter speed | 1/6000s | 1/8000s |
| Continuous shooting rate | 6.0fps | 10.0fps |
| Shutter priority | ||
| Aperture priority | ||
| Manual mode | ||
| Exposure compensation | Yes | Yes |
| Custom white balance | ||
| Image stabilization | ||
| Integrated flash | ||
| Flash range | 12.00 m (at ISO 100) | no built-in flash |
| Flash settings | Auto, Red-eye Reduction, Slow-speed Sync, Trailing Curtain Sync, High-Speed Sync and Wireless Sync | no built-in flash |
| Hot shoe | ||
| AEB | ||
| White balance bracketing | ||
| Highest flash synchronize | 1/180s | - |
| Exposure | ||
| Multisegment metering | ||
| Average metering | ||
| Spot metering | ||
| Partial metering | ||
| AF area metering | ||
| Center weighted metering | ||
| Video features | ||
| Supported video resolutions | 1280 x 720 (25 fps), 640 x 480 (25 fps) | 3840 x 2160 (30p, 24p) 1920 x 1080 (120p, 60p, 60i, 24p), 1440 x 1080 (30p), 640 x 480 (30p) |
| Max video resolution | 1280x720 | 3840x2160 |
| Video data format | Motion JPEG | MPEG-4, AVCHD, XAVC S, 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 | Optional | None |
| Physical | ||
| Environment sealing | ||
| Water proof | ||
| Dust proof | ||
| Shock proof | ||
| Crush proof | ||
| Freeze proof | ||
| Weight | 598 gr (1.32 pounds) | 650 gr (1.43 pounds) |
| Dimensions | 125 x 97 x 68mm (4.9" x 3.8" x 2.7") | 127 x 96 x 74mm (5.0" x 3.8" x 2.9") |
| DXO scores | ||
| DXO All around score | 72 | 96 |
| DXO Color Depth score | 22.9 | 25.0 |
| DXO Dynamic range score | 12.4 | 14.7 |
| DXO Low light score | 755 | 3730 |
| Other | ||
| Battery life | 470 photographs | 610 photographs |
| Battery type | Battery Pack | Battery Pack |
| Battery model | D-LI109,4 x AA | NP-FZ100 |
| Self timer | Yes (2 or 12 sec) | Yes (2 or 10 sec; continuous (3 or 5 exposures)) |
| Time lapse feature | ||
| Storage type | SD/SDHC | SD/SDHC/SDXC, Memory Stick Duo/Pro Duo/Pro-HG Duo |
| Card slots | 1 | Dual |
| Cost at launch | $1,100 | $1,998 |