Olympus E-M5 III vs Pentax K-S2
80 Imaging
61 Features
88 Overall
71
64 Imaging
63 Features
82 Overall
70
Olympus E-M5 III vs Pentax K-S2 Key Specs
(Full Review)
- 20MP - Four Thirds Sensor
- 3" Fully Articulated Screen
- ISO 200 - 25600
- Sensor based 5-axis Image Stabilization
- 1/8000s Max Shutter
- 4096 x 2160 video
- Micro Four Thirds Mount
- 414g - 125 x 85 x 50mm
- Introduced October 2019
- Succeeded the Olympus E-M5 II
- Replacement is OM System OM-5
(Full Review)
- 20MP - APS-C Sensor
- 3" Fully Articulated Screen
- ISO 100 - 51200
- Sensor based Image Stabilization
- No Anti-Alias Filter
- 1/6000s Maximum Shutter
- 1920 x 1080 video
- Pentax KAF2 Mount
- 678g - 123 x 91 x 73mm
- Launched February 2015
- Succeeded the Pentax K-S1
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Its time to take a deeper look at the Olympus E-M5 III vs Pentax K-S2, former is a Advanced Mirrorless while the latter is a Entry-Level DSLR by competitors Olympus and Pentax. The image resolution of the E-M5 III (20MP) and the K-S2 (20MP) is pretty similar but the E-M5 III (Four Thirds) and K-S2 (APS-C) boast different sensor dimensions.
President Biden pushes bill mandating TikTok sale or banThe E-M5 III was unveiled 4 years after the K-S2 which is quite a large difference as far as tech is concerned. Both of the cameras feature different body design with the Olympus E-M5 III being a SLR-style mirrorless camera and the Pentax K-S2 being a Compact SLR camera.
Before diving right into a complete comparison, here is a concise overview of how the E-M5 III scores against the K-S2 with respect to portability, imaging, features and an overall mark.
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Here is a preview of the gallery images for Olympus OM-D E-M5 III & Pentax K-S2. The full galleries are provided at Olympus E-M5 III Gallery & Pentax K-S2 Gallery.
Reasons to pick Olympus E-M5 III over the Pentax K-S2
| E-M5 III | K-S2 | |||
|---|---|---|---|---|
| Launched | October 2019 | February 2015 | Newer by 57 months | |
| Screen resolution | 1040k | 921k | Sharper screen (+119k dot) | |
| Touch screen | Quickly navigate |
Reasons to pick Pentax K-S2 over the Olympus E-M5 III
| K-S2 | E-M5 III |
|---|
Common features in the Olympus E-M5 III and Pentax K-S2
| E-M5 III | K-S2 | |||
|---|---|---|---|---|
| Manual focus | Very exact focus | |||
| Screen type | Fully Articulated | Fully Articulated | Fully Articulated screen | |
| Screen size | 3" | 3" | Same screen sizing | |
| Selfie screen | Both are selfie friendly |
Olympus E-M5 III vs Pentax K-S2 Physical Comparison
If you are aiming to travel with your camera, you should consider its weight and volume. The Olympus E-M5 III enjoys outer dimensions of 125mm x 85mm x 50mm (4.9" x 3.3" x 2.0") accompanied by a weight of 414 grams (0.91 lbs) whilst the Pentax K-S2 has sizing of 123mm x 91mm x 73mm (4.8" x 3.6" x 2.9") accompanied by a weight of 678 grams (1.49 lbs).
Check the Olympus E-M5 III vs Pentax K-S2 in our newest Camera & Lens Size Comparison Tool.
Take into consideration, the weight of an ILC will differ based on the lens you have chosen at that time. Following is a front view size comparison of the E-M5 III compared to the K-S2.

Considering size and weight, the portability score of the E-M5 III and K-S2 is 80 and 64 respectively.
Olympus E-M5 III vs Pentax K-S2 Sensor Comparison
Often, its tough to visualize the contrast between sensor dimensions merely by going over specifications. The pic here should give you a greater sense of the sensor sizes in the E-M5 III and K-S2.
Plainly, the two cameras come with the identical MP albeit different sensor dimensions. The E-M5 III has got the tinier sensor which will make achieving shallower depth of field more difficult. The more modern E-M5 III provides an edge when it comes to sensor technology.
Olympus E-M5 III vs Pentax K-S2 Screen and ViewFinder
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Olympus E-M5 III vs Pentax K-S2 Specifications
| Olympus OM-D E-M5 III | Pentax K-S2 | |
|---|---|---|
| General Information | ||
| Brand Name | Olympus | Pentax |
| Model type | Olympus OM-D E-M5 III | Pentax K-S2 |
| Type | Advanced Mirrorless | Entry-Level DSLR |
| Introduced | 2019-10-17 | 2015-02-10 |
| Physical type | SLR-style mirrorless | Compact SLR |
| Sensor Information | ||
| Powered by | TruePic VIII | PRIME MII |
| Sensor type | MOS | CMOS |
| Sensor size | Four Thirds | APS-C |
| Sensor measurements | 17.4 x 13mm | 23.5 x 15.6mm |
| Sensor surface area | 226.2mm² | 366.6mm² |
| Sensor resolution | 20 megapixel | 20 megapixel |
| Anti alias filter | ||
| Aspect ratio | 1:1, 4:3, 3:2 and 16:9 | 3:2 |
| Peak resolution | 5184 x 3888 | 5472 x 3648 |
| Highest native ISO | 25600 | 51200 |
| Minimum native ISO | 200 | 100 |
| RAW data | ||
| Minimum enhanced ISO | 64 | - |
| Autofocusing | ||
| Manual focusing | ||
| AF touch | ||
| Continuous AF | ||
| AF single | ||
| Tracking AF | ||
| AF selectice | ||
| AF center weighted | ||
| AF multi area | ||
| Live view AF | ||
| Face detection AF | ||
| Contract detection AF | ||
| Phase detection AF | ||
| Total focus points | 121 | 11 |
| Lens | ||
| Lens support | Micro Four Thirds | Pentax KAF2 |
| Number of lenses | 107 | 151 |
| Crop factor | 2.1 | 1.5 |
| Screen | ||
| Type of screen | Fully Articulated | Fully Articulated |
| Screen diagonal | 3 inches | 3 inches |
| Screen resolution | 1,040 thousand dots | 921 thousand dots |
| Selfie friendly | ||
| Liveview | ||
| Touch function | ||
| Viewfinder Information | ||
| Viewfinder type | Electronic | Optical (pentaprism) |
| Viewfinder resolution | 2,360 thousand dots | - |
| Viewfinder coverage | 100% | 100% |
| Viewfinder magnification | 0.68x | 0.64x |
| Features | ||
| Min shutter speed | 60 secs | 30 secs |
| Max shutter speed | 1/8000 secs | 1/6000 secs |
| Max silent shutter speed | 1/32000 secs | - |
| Continuous shutter rate | 30.0 frames/s | 5.4 frames/s |
| Shutter priority | ||
| Aperture priority | ||
| Expose Manually | ||
| Exposure compensation | Yes | Yes |
| Set WB | ||
| Image stabilization | ||
| Inbuilt flash | ||
| Flash distance | no built-in flash | 12.00 m (at ISO 100) |
| Flash modes | Auto, redeye, fill, off, redeye slow sync, slow sync, 2nd-curtain slow sync, manual | Auto, auto w/redeye reduction, flash on, flash on + redeye reduction, slow sync, trailing curtain sync, manual flash |
| Hot shoe | ||
| Auto exposure bracketing | ||
| White balance bracketing | ||
| Max flash synchronize | 1/250 secs | - |
| Exposure | ||
| Multisegment | ||
| Average | ||
| Spot | ||
| Partial | ||
| AF area | ||
| Center weighted | ||
| Video features | ||
| Supported video resolutions | 4096 x 2160 @ 24p / 237 Mbps, MOV, H.264, Linear PCM | 1920 x 1080 (30p, 25p, 24p), 1280 x 720 (60p, 50p) |
| Highest video resolution | 4096x2160 | 1920x1080 |
| Video file format | MPEG-4, H.264 | MPEG-4, H.264 |
| Microphone port | ||
| Headphone port | ||
| Connectivity | ||
| Wireless | Built-In | Built-In |
| Bluetooth | ||
| NFC | ||
| HDMI | ||
| USB | USB 2.0 (480 Mbit/sec) | USB 2.0 (480 Mbit/sec) |
| GPS | None | Optional |
| Physical | ||
| Environment sealing | ||
| Water proofing | ||
| Dust proofing | ||
| Shock proofing | ||
| Crush proofing | ||
| Freeze proofing | ||
| Weight | 414g (0.91 lbs) | 678g (1.49 lbs) |
| Physical dimensions | 125 x 85 x 50mm (4.9" x 3.3" x 2.0") | 123 x 91 x 73mm (4.8" x 3.6" x 2.9") |
| DXO scores | ||
| DXO Overall rating | not tested | not tested |
| DXO Color Depth rating | not tested | not tested |
| DXO Dynamic range rating | not tested | not tested |
| DXO Low light rating | not tested | not tested |
| Other | ||
| Battery life | 310 pictures | 410 pictures |
| Battery type | Battery Pack | Battery Pack |
| Battery ID | BLN-1 | D-LI109 |
| Self timer | Yes (2 or 10 secs, custom) | Yes (2 or 12 secs) |
| Time lapse recording | ||
| Storage type | SD/SDHC/SDXC (UHS-II supported) | SD/SDHC/SDXC |
| Card slots | 1 | 1 |
| Pricing at release | $1,199 | $581 |