Olympus E-M1 vs Pentax K-S1
71 Imaging
53 Features
85 Overall
65
69 Imaging
63 Features
70 Overall
65
Olympus E-M1 vs Pentax K-S1 Key Specs
(Full Review)
- 16MP - Four Thirds Sensor
- 3" Tilting Screen
- ISO 100 - 25600
- Sensor based 5-axis Image Stabilization
- 1/8000s Maximum Shutter
- 1920 x 1080 video
- Micro Four Thirds Mount
- 497g - 130 x 94 x 63mm
- Revealed October 2013
- Renewed by Olympus E-M1 II
(Full Review)
- 20MP - APS-C Sensor
- 3" Fixed Display
- ISO 100 - 51200
- Sensor based Image Stabilization
- No Anti-Alias Filter
- 1/6000s Max Shutter
- 1920 x 1080 video
- Pentax KAF2 Mount
- 558g - 121 x 93 x 70mm
- Introduced August 2014
- Replacement is Pentax K-S2
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Here, we are looking at the Olympus E-M1 and Pentax K-S1, one being a Pro Mirrorless and the other is a Advanced DSLR by competitors Olympus and Pentax. The image resolution of the E-M1 (16MP) and the K-S1 (20MP) is very well matched but the E-M1 (Four Thirds) and K-S1 (APS-C) provide totally different sensor sizes.
Apple Innovates by Creating Next-Level Optical Stabilization for iPhoneThe E-M1 was launched 10 months before the K-S1 and they are both of a similar generation. The two cameras feature different body design with the Olympus E-M1 being a SLR-style mirrorless camera and the Pentax K-S1 being a Mid-size SLR camera.
Before we go right into a complete comparison, here is a concise synopsis of how the E-M1 grades against the K-S1 in relation to portability, imaging, features and an overall rating.
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Following is a sample of the gallery pics for Olympus OM-D E-M1 and Pentax K-S1. The complete galleries are provided at Olympus E-M1 Gallery and Pentax K-S1 Gallery.
Reasons to pick Olympus E-M1 over the Pentax K-S1
| E-M1 | K-S1 | |||
|---|---|---|---|---|
| Display type | Tilting |  | Fixed | Tilting display |
| Display resolution | 1037k |  | 921k | Crisper display (+116k dot) |
| Touch friendly display |  | Easily navigate |
Reasons to pick Pentax K-S1 over the Olympus E-M1
| K-S1 | E-M1 | |||
|---|---|---|---|---|
| Introduced | August 2014 |  | October 2013 | Fresher by 10 months |
Common features in the Olympus E-M1 and Pentax K-S1
| E-M1 | K-S1 | |||
|---|---|---|---|---|
| Manual focus |  | Dial precise focusing | ||
| Display size | 3" |  | 3" | Same display dimensions |
| Selfie screen |  | Neither offers selfie screen |
Olympus E-M1 vs Pentax K-S1 Physical Comparison
If you are looking to carry your camera, you need to consider its weight and volume. The Olympus E-M1 offers physical dimensions of 130mm x 94mm x 63mm (5.1" x 3.7" x 2.5") accompanied by a weight of 497 grams (1.10 lbs) while the Pentax K-S1 has sizing of 121mm x 93mm x 70mm (4.8" x 3.7" x 2.8") along with a weight of 558 grams (1.23 lbs).
Look at the Olympus E-M1 and Pentax K-S1 in the new Camera with Lens Size Comparison Tool.
Remember, the weight of an Interchangeable Lens Camera will differ based on the lens you are utilising during that time. Below is a front view scale comparison of the E-M1 vs the K-S1.
Considering size and weight, the portability grade of the E-M1 and K-S1 is 71 and 69 respectively.
Olympus E-M1 vs Pentax K-S1 Sensor Comparison
Generally, it can be difficult to visualise the gap between sensor sizing simply by checking specs. The graphic underneath should give you a stronger sense of the sensor dimensions in the E-M1 and K-S1.
All in all, the 2 cameras come with different megapixel count and different sensor sizing. The E-M1 due to its tinier sensor will make shooting shallower DOF more challenging and the Pentax K-S1 will resolve greater detail utilizing its extra 4MP. Greater resolution will also make it easier to crop photos a good deal more aggressively. The older E-M1 is going to be behind in sensor innovation.
Olympus E-M1 vs Pentax K-S1 Screen and ViewFinder
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Olympus E-M1 vs Pentax K-S1 Specifications
| Olympus OM-D E-M1 | Pentax K-S1 | |
|---|---|---|
| General Information | ||
| Company | Olympus | Pentax |
| Model type | Olympus OM-D E-M1 | Pentax K-S1 |
| Category | Pro Mirrorless | Advanced DSLR |
| Revealed | 2013-10-28 | 2014-08-27 |
| Body design | SLR-style mirrorless | Mid-size SLR |
| Sensor Information | ||
| Powered by | TruePIC VII | Prime MII |
| Sensor type | CMOS | CMOS |
| Sensor size | Four Thirds | APS-C |
| Sensor dimensions | 17.3 x 13mm | 23.5 x 15.6mm |
| Sensor area | 224.9mm² | 366.6mm² |
| Sensor resolution | 16MP | 20MP |
| Anti alias filter | ||
| Aspect ratio | 1:1, 4:3, 3:2 and 16:9 | 3:2 |
| Peak resolution | 4608 x 3456 | 5472 x 3648 |
| Highest native ISO | 25600 | 51200 |
| Min native ISO | 100 | 100 |
| RAW format | ||
| Autofocusing | ||
| Manual focusing | ||
| Touch to focus | ||
| Autofocus continuous | ||
| Single autofocus | ||
| Tracking autofocus | ||
| Autofocus selectice | ||
| Autofocus center weighted | ||
| Multi area autofocus | ||
| Live view autofocus | ||
| Face detection autofocus | ||
| Contract detection autofocus | ||
| Phase detection autofocus | ||
| Total focus points | 81 | 11 |
| Lens | ||
| Lens support | Micro Four Thirds | Pentax KAF2 |
| Number of lenses | 107 | 151 |
| Focal length multiplier | 2.1 | 1.5 |
| Screen | ||
| Range of screen | Tilting | Fixed Type |
| Screen diagonal | 3 inch | 3 inch |
| Screen resolution | 1,037k dot | 921k dot |
| Selfie friendly | ||
| Liveview | ||
| Touch operation | ||
| Viewfinder Information | ||
| Viewfinder type | Electronic | Optical (pentaprism) |
| Viewfinder resolution | 2,360k dot | - |
| Viewfinder coverage | 100 percent | 100 percent |
| Viewfinder magnification | 0.74x | 0.64x |
| Features | ||
| Min shutter speed | 60 seconds | 30 seconds |
| Max shutter speed | 1/8000 seconds | 1/6000 seconds |
| Continuous shutter speed | 10.0 frames/s | 5.4 frames/s |
| Shutter priority | ||
| Aperture priority | ||
| Manually set exposure | ||
| Exposure compensation | Yes | Yes |
| Change white balance | ||
| Image stabilization | ||
| Inbuilt flash | ||
| Flash distance | no built-in flash | 10.00 m (at ISO 100) |
| Flash modes | Flash Auto, Redeye, Fill-in, Flash Off, Red-eye Slow sync (1st curtain), Slow sync (1st curtain), Slow sync (2nd curtain), Manual | Auto, auto + redeye, on, on + redeye reduction, slow sync, trailing curtain sync, manual |
| External flash | ||
| AE bracketing | ||
| White balance bracketing | ||
| Max flash sync | 1/320 seconds | - |
| Exposure | ||
| Multisegment metering | ||
| Average metering | ||
| Spot metering | ||
| Partial metering | ||
| AF area metering | ||
| Center weighted metering | ||
| Video features | ||
| Supported video resolutions | 1920 x 1080 (30 fps), 1280 x 720 (30 fps), 640 x 480 (30 fps) | 1920 x 1080 (30,25,24 fps), 1280 x 720 (60,50 fps) |
| Highest video resolution | 1920x1080 | 1920x1080 |
| Video file format | H.264, Motion JPEG | H.264 |
| Mic jack | ||
| Headphone jack | ||
| Connectivity | ||
| Wireless | Built-In | Eye-Fi Connected |
| Bluetooth | ||
| NFC | ||
| HDMI | ||
| USB | USB 2.0 (480 Mbit/sec) | USB 2.0 (480 Mbit/sec) |
| GPS | None | Optional |
| Physical | ||
| Environmental seal | ||
| Water proofing | ||
| Dust proofing | ||
| Shock proofing | ||
| Crush proofing | ||
| Freeze proofing | ||
| Weight | 497g (1.10 pounds) | 558g (1.23 pounds) |
| Physical dimensions | 130 x 94 x 63mm (5.1" x 3.7" x 2.5") | 121 x 93 x 70mm (4.8" x 3.7" x 2.8") |
| DXO scores | ||
| DXO Overall rating | 73 | 78 |
| DXO Color Depth rating | 23.0 | 23.5 |
| DXO Dynamic range rating | 12.7 | 13.0 |
| DXO Low light rating | 757 | 1061 |
| Other | ||
| Battery life | 350 pictures | 410 pictures |
| Battery form | Battery Pack | Battery Pack |
| Battery ID | BLN-1 | D-LI109 |
| Self timer | Yes (2 or 12 secs, custom) | Yes ( 2 or 12 seconds) |
| Time lapse recording | ||
| Storage media | SD/SDHC/SDXC | SD/SDHC/SDXC |
| Storage slots | One | One |
| Launch pricing | $799 | $339 |