Olympus E-420 vs Pentax K-S1
77 Imaging
44 Features
36 Overall
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69 Imaging
63 Features
70 Overall
65
Olympus E-420 vs Pentax K-S1 Key Specs
(Full Review)
- 10MP - Four Thirds Sensor
- 2.7" Fixed Screen
- ISO 100 - 1600
- No Video
- Micro Four Thirds Mount
- 426g - 130 x 91 x 53mm
- Launched June 2008
- Older Model is Olympus E-410
(Full Review)
- 20MP - APS-C Sensor
- 3" Fixed Screen
- 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
- Launched August 2014
- Updated by Pentax K-S2
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Let's look more closely at the Olympus E-420 versus Pentax K-S1, former is a Entry-Level DSLR while the latter is a Advanced DSLR by manufacturers Olympus and Pentax. There is a considerable difference between the image resolutions of the E-420 (10MP) and K-S1 (20MP) and the E-420 (Four Thirds) and K-S1 (APS-C) offer different sensor sizes.
Snapchat Adds Watermarks to AI-Created ImagesThe E-420 was manufactured 7 years prior to the K-S1 which is quite a large difference as far as tech is concerned. Both cameras have different body design with the Olympus E-420 being a Compact SLR camera and the Pentax K-S1 being a Mid-size SLR camera.
Before we go straight to a in-depth comparison, here is a quick summation of how the E-420 grades vs the K-S1 with regard to portability, imaging, features and an overall mark.
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The following is a preview of the gallery photos for Olympus E-420 & Pentax K-S1. The entire galleries are provided at Olympus E-420 Gallery & Pentax K-S1 Gallery.
Reasons to pick Olympus E-420 over the Pentax K-S1
| E-420 | K-S1 |
|---|
Reasons to pick Pentax K-S1 over the Olympus E-420
| K-S1 | E-420 | |||
|---|---|---|---|---|
| Launched | August 2014 | June 2008 | Newer by 75 months | |
| Screen dimensions | 3" | 2.7" | Bigger screen (+0.3") | |
| Screen resolution | 921k | 230k | Sharper screen (+691k dot) |
Common features in the Olympus E-420 and Pentax K-S1
| E-420 | K-S1 | |||
|---|---|---|---|---|
| Manual focus | Dial accurate focusing | |||
| Screen type | Fixed | Fixed | Fixed screen | |
| Selfie screen | Neither provides selfie screen | |||
| Touch friendly screen | Neither provides Touch friendly screen |
Olympus E-420 vs Pentax K-S1 Physical Comparison
For anybody who is intending to travel with your camera often, you are going to need to factor its weight and volume. The Olympus E-420 provides outer dimensions of 130mm x 91mm x 53mm (5.1" x 3.6" x 2.1") and a weight of 426 grams (0.94 lbs) whilst the Pentax K-S1 has sizing of 121mm x 93mm x 70mm (4.8" x 3.7" x 2.8") with a weight of 558 grams (1.23 lbs).
Check the Olympus E-420 versus Pentax K-S1 in our brand new Camera plus Lens Size Comparison Tool.
Remember, the weight of an ILC will vary depending on the lens you are utilizing at that moment. Underneath is a front view measurement comparison of the E-420 vs the K-S1.

Looking at size and weight, the portability score of the E-420 and K-S1 is 77 and 69 respectively.
Olympus E-420 vs Pentax K-S1 Sensor Comparison
In many cases, it's hard to imagine the gap between sensor dimensions just by reading through specs. The pic here will offer you a better sense of the sensor sizes in the E-420 and K-S1.
As you can plainly see, both of these cameras provide different megapixels and different sensor dimensions. The E-420 due to its tinier sensor is going to make achieving bokeh more difficult and the Pentax K-S1 will give extra detail due to its extra 10 Megapixels. Higher resolution can also make it easier to crop shots more aggressively. The more aged E-420 is going to be disadvantaged in sensor tech.
Olympus E-420 vs Pentax K-S1 Screen and ViewFinder
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Olympus E-420 vs Pentax K-S1 Specifications
| Olympus E-420 | Pentax K-S1 | |
|---|---|---|
| General Information | ||
| Manufacturer | Olympus | Pentax |
| Model type | Olympus E-420 | Pentax K-S1 |
| Class | Entry-Level DSLR | Advanced DSLR |
| Launched | 2008-06-23 | 2014-08-27 |
| Body design | Compact SLR | Mid-size SLR |
| Sensor Information | ||
| Processor | TruePic III | 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 | 10 megapixel | 20 megapixel |
| Anti alias filter | ||
| Aspect ratio | 4:3 | 3:2 |
| Max resolution | 3648 x 2736 | 5472 x 3648 |
| Max native ISO | 1600 | 51200 |
| Minimum native ISO | 100 | 100 |
| RAW files | ||
| Autofocusing | ||
| Manual focusing | ||
| Touch focus | ||
| Continuous autofocus | ||
| Single autofocus | ||
| Autofocus tracking | ||
| Autofocus selectice | ||
| Autofocus center weighted | ||
| Autofocus multi area | ||
| Live view autofocus | ||
| Face detection autofocus | ||
| Contract detection autofocus | ||
| Phase detection autofocus | ||
| Total focus points | 3 | 11 |
| Lens | ||
| Lens support | Micro Four Thirds | Pentax KAF2 |
| Available lenses | 45 | 151 |
| Crop factor | 2.1 | 1.5 |
| Screen | ||
| Range of screen | Fixed Type | Fixed Type |
| Screen size | 2.7 inches | 3 inches |
| Resolution of screen | 230 thousand dot | 921 thousand dot |
| Selfie friendly | ||
| Liveview | ||
| Touch display | ||
| Viewfinder Information | ||
| Viewfinder | Optical (pentamirror) | Optical (pentaprism) |
| Viewfinder coverage | 95% | 100% |
| Viewfinder magnification | 0.46x | 0.64x |
| Features | ||
| Minimum shutter speed | 60 seconds | 30 seconds |
| Fastest shutter speed | 1/4000 seconds | 1/6000 seconds |
| Continuous shutter speed | 4.0 frames per second | 5.4 frames per second |
| Shutter priority | ||
| Aperture priority | ||
| Expose Manually | ||
| Exposure compensation | Yes | Yes |
| Custom white balance | ||
| Image stabilization | ||
| Built-in flash | ||
| Flash distance | 12.00 m (at ISO 100) | 10.00 m (at ISO 100) |
| Flash options | Auto, Auto FP, Manual, Red-Eye | Auto, auto + redeye, on, on + redeye reduction, slow sync, trailing curtain sync, manual |
| External flash | ||
| AE bracketing | ||
| WB bracketing | ||
| Fastest flash sync | 1/180 seconds | - |
| Exposure | ||
| Multisegment metering | ||
| Average metering | ||
| Spot metering | ||
| Partial metering | ||
| AF area metering | ||
| Center weighted metering | ||
| Video features | ||
| Supported video resolutions | - | 1920 x 1080 (30,25,24 fps), 1280 x 720 (60,50 fps) |
| Max video resolution | None | 1920x1080 |
| Video file format | - | H.264 |
| Mic input | ||
| Headphone input | ||
| Connectivity | ||
| Wireless | None | Eye-Fi Connected |
| Bluetooth | ||
| NFC | ||
| HDMI | ||
| USB | USB 2.0 (480 Mbit/sec) | USB 2.0 (480 Mbit/sec) |
| GPS | None | Optional |
| Physical | ||
| Environment seal | ||
| Water proofing | ||
| Dust proofing | ||
| Shock proofing | ||
| Crush proofing | ||
| Freeze proofing | ||
| Weight | 426 grams (0.94 lb) | 558 grams (1.23 lb) |
| Physical dimensions | 130 x 91 x 53mm (5.1" x 3.6" x 2.1") | 121 x 93 x 70mm (4.8" x 3.7" x 2.8") |
| DXO scores | ||
| DXO Overall rating | 56 | 78 |
| DXO Color Depth rating | 21.5 | 23.5 |
| DXO Dynamic range rating | 10.4 | 13.0 |
| DXO Low light rating | 527 | 1061 |
| Other | ||
| Battery life | 500 photographs | 410 photographs |
| Battery format | Battery Pack | Battery Pack |
| Battery ID | - | D-LI109 |
| Self timer | Yes (2 or 12 sec) | Yes ( 2 or 12 seconds) |
| Time lapse shooting | ||
| Storage media | Compact Flash (Type I or II), xD Picture Card | SD/SDHC/SDXC |
| Storage slots | 1 | 1 |
| Price at release | $999 | $339 |