Pentax K-3 vs Pentax K-S1
59 Imaging
64 Features
85 Overall
72
69 Imaging
63 Features
70 Overall
65
Pentax K-3 vs Pentax K-S1 Key Specs
(Full Review)
- 24MP - APS-C Sensor
- 3.2" Fixed Display
- ISO 100 - 51200
- Sensor based Image Stabilization
- No Anti-Alias Filter
- 1/8000s Maximum Shutter
- 1920 x 1080 video
- Pentax KAF2 Mount
- 800g - 131 x 100 x 77mm
- Introduced April 2014
- Refreshed by Pentax K-3 II
(Full Review)
- 20MP - APS-C Sensor
- 3" Fixed Display
- ISO 100 - 51200
- Sensor based Image Stabilization
- No Anti-Alias Filter
- 1/6000s Maximum Shutter
- 1920 x 1080 video
- Pentax KAF2 Mount
- 558g - 121 x 93 x 70mm
- Revealed August 2014
- Replacement is Pentax K-S2
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Following is a thorough review of the Pentax K-3 versus Pentax K-S1, both Advanced DSLR digital cameras and they are both created by Pentax. The image resolution of the K-3 (24MP) and the K-S1 (20MP) is fairly similar and both cameras have the same sensor dimensions (APS-C).
President Biden pushes bill mandating TikTok sale or banThe K-3 was revealed 4 months before the K-S1 which means that they are of a similar age. Both the cameras have the same body design (Mid-size SLR).
Before we go right into a complete comparison, here is a brief highlight of how the K-3 scores against the K-S1 with respect to portability, imaging, features and an overall score.
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Here is a sample of the gallery pictures for Pentax K-3 & Pentax K-S1. The full galleries are viewable at Pentax K-3 Gallery & Pentax K-S1 Gallery.
Reasons to pick Pentax K-3 over the Pentax K-S1
| K-3 | K-S1 | |||
|---|---|---|---|---|
| Display dimensions | 3.2" | 3" | Larger display (+0.2") | |
| Display resolution | 1037k | 921k | Crisper display (+116k dot) |
Reasons to pick Pentax K-S1 over the Pentax K-3
| K-S1 | K-3 |
|---|
Common features in the Pentax K-3 and Pentax K-S1
| K-3 | K-S1 | |||
|---|---|---|---|---|
| Revealed | April 2014 | August 2014 | Similar age | |
| Manual focus | More precise focus | |||
| Display type | Fixed | Fixed | Fixed display | |
| Selfie screen | Neither features selfie screen | |||
| Touch display | Neither features Touch display |
Pentax K-3 vs Pentax K-S1 Physical Comparison
In case you're going to carry around your camera, you'll need to think about its weight and size. The Pentax K-3 enjoys external measurements of 131mm x 100mm x 77mm (5.2" x 3.9" x 3.0") along with a weight of 800 grams (1.76 lbs) whilst the Pentax K-S1 has specifications of 121mm x 93mm x 70mm (4.8" x 3.7" x 2.8") with a weight of 558 grams (1.23 lbs).
Analyze the Pentax K-3 versus Pentax K-S1 in our newest Camera plus Lens Size Comparison Tool.
Keep in mind, the weight of an ILC will differ dependant on the lens you have at that time. The following is a front view size comparison of the K-3 vs the K-S1.

Taking into account dimensions and weight, the portability rating of the K-3 and K-S1 is 59 and 69 respectively.
Pentax K-3 vs Pentax K-S1 Sensor Comparison
Quite often, its tough to see the contrast between sensor sizes merely by going over technical specs. The pic here may provide you a much better sense of the sensor sizing in the K-3 and K-S1.
As you can tell, the two cameras provide the same sensor dimensions but not the same resolution. You can anticipate the Pentax K-3 to offer extra detail because of its extra 4 Megapixels. Greater resolution will also make it easier to crop pics more aggressively.
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Pentax K-3 vs Pentax K-S1 Specifications
| Pentax K-3 | Pentax K-S1 | |
|---|---|---|
| General Information | ||
| Manufacturer | Pentax | Pentax |
| Model | Pentax K-3 | Pentax K-S1 |
| Category | Advanced DSLR | Advanced DSLR |
| Introduced | 2014-04-10 | 2014-08-27 |
| Physical type | Mid-size SLR | Mid-size SLR |
| Sensor Information | ||
| Chip | Prime III | Prime MII |
| Sensor type | CMOS | CMOS |
| Sensor size | APS-C | APS-C |
| Sensor dimensions | 23.5 x 15.6mm | 23.5 x 15.6mm |
| Sensor area | 366.6mm² | 366.6mm² |
| Sensor resolution | 24 megapixels | 20 megapixels |
| Anti aliasing filter | ||
| Aspect ratio | 3:2 | 3:2 |
| Max resolution | 6016 x 4000 | 5472 x 3648 |
| Max native ISO | 51200 | 51200 |
| Lowest native ISO | 100 | 100 |
| RAW data | ||
| Autofocusing | ||
| Manual focus | ||
| AF touch | ||
| AF continuous | ||
| AF single | ||
| Tracking AF | ||
| Selective AF | ||
| AF center weighted | ||
| Multi area AF | ||
| AF live view | ||
| Face detect AF | ||
| Contract detect AF | ||
| Phase detect AF | ||
| Number of focus points | 27 | 11 |
| Cross focus points | 25 | - |
| Lens | ||
| Lens mounting type | Pentax KAF2 | Pentax KAF2 |
| Amount of lenses | 151 | 151 |
| Crop factor | 1.5 | 1.5 |
| Screen | ||
| Type of display | Fixed Type | Fixed Type |
| Display size | 3.2 inch | 3 inch |
| Resolution of display | 1,037 thousand dots | 921 thousand dots |
| Selfie friendly | ||
| Liveview | ||
| Touch display | ||
| Display technology | TFT LCD monitor | - |
| Viewfinder Information | ||
| Viewfinder type | Optical (pentaprism) | Optical (pentaprism) |
| Viewfinder coverage | 100% | 100% |
| Viewfinder magnification | 0.64x | 0.64x |
| Features | ||
| Minimum shutter speed | 30s | 30s |
| Fastest shutter speed | 1/8000s | 1/6000s |
| Continuous shutter rate | 8.0 frames per second | 5.4 frames per second |
| Shutter priority | ||
| Aperture priority | ||
| Manually set exposure | ||
| Exposure compensation | Yes | Yes |
| Change WB | ||
| Image stabilization | ||
| Inbuilt flash | ||
| Flash range | 13.00 m (at ISO 100) | 10.00 m (at ISO 100) |
| Flash modes | Auto, on, off, red-eye, slow sync, slow sync + red-eye, trailing curtain sync, high speed, wireless, manual | Auto, auto + redeye, on, on + redeye reduction, slow sync, trailing curtain sync, manual |
| Hot shoe | ||
| Auto exposure bracketing | ||
| WB bracketing | ||
| Fastest flash synchronize | 1/180s | - |
| Exposure | ||
| Multisegment exposure | ||
| Average exposure | ||
| Spot exposure | ||
| Partial exposure | ||
| AF area exposure | ||
| Center weighted exposure | ||
| Video features | ||
| Supported video resolutions | 1920 x 1080 (60i, 50i, 30p, 25p, 24p), 1280 x 720 (60p, 50p, 30p, 25p, 24p) | 1920 x 1080 (30,25,24 fps), 1280 x 720 (60,50 fps) |
| Max video resolution | 1920x1080 | 1920x1080 |
| Video data format | MPEG-4, H.264 | H.264 |
| Mic port | ||
| Headphone port | ||
| Connectivity | ||
| Wireless | None | Eye-Fi Connected |
| Bluetooth | ||
| NFC | ||
| HDMI | ||
| USB | USB 3.0 (5 GBit/sec) | USB 2.0 (480 Mbit/sec) |
| GPS | Optional | Optional |
| Physical | ||
| Environment sealing | ||
| Water proof | ||
| Dust proof | ||
| Shock proof | ||
| Crush proof | ||
| Freeze proof | ||
| Weight | 800g (1.76 lb) | 558g (1.23 lb) |
| Physical dimensions | 131 x 100 x 77mm (5.2" x 3.9" x 3.0") | 121 x 93 x 70mm (4.8" x 3.7" x 2.8") |
| DXO scores | ||
| DXO Overall score | 80 | 78 |
| DXO Color Depth score | 23.7 | 23.5 |
| DXO Dynamic range score | 13.4 | 13.0 |
| DXO Low light score | 1216 | 1061 |
| Other | ||
| Battery life | 560 images | 410 images |
| Style of battery | Battery Pack | Battery Pack |
| Battery model | D-LI90 | D-LI109 |
| Self timer | Yes ( 2 or 12 seconds) | Yes ( 2 or 12 seconds) |
| Time lapse feature | ||
| Storage type | Dual SD/SDHC/SDXC | SD/SDHC/SDXC |
| Card slots | Two | 1 |
| Pricing at release | $639 | $339 |