Olympus E-M5 III vs Pentax 645D
80 Imaging
62 Features
88 Overall
72
50 Imaging
76 Features
52 Overall
66
Olympus E-M5 III vs Pentax 645D Key Specs
(Full Review)
- 20MP - Four Thirds Sensor
- 3" Fully Articulated Display
- 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
- Released October 2019
- Earlier Model is Olympus E-M5 II
- Newer Model is OM System OM-5
(Full Review)
- 40MP - Medium format Sensor
- 3" Fixed Display
- ISO 200 - 1600
- No Anti-Alias Filter
- No Video
- Pentax 645AF2 Mount
- 1480g - 156 x 117 x 119mm
- Announced March 2010
- Successor is Pentax 645Z
Photography Glossary Olympus E-M5 III vs Pentax 645D Overview
Following is a complete assessment of the Olympus E-M5 III and Pentax 645D, former is a Advanced Mirrorless while the other is a Pro DSLR by competitors Olympus and Pentax. There is a sizable difference between the image resolutions of the E-M5 III (20MP) and 645D (40MP) and the E-M5 III (Four Thirds) and 645D (Medium format) offer different sensor size.
Meta to Introduce 'AI-Generated' Labels for Media starting next monthThe E-M5 III was announced 9 years after the 645D which is quite a significant difference as far as tech is concerned. Both of these cameras have different body design with the Olympus E-M5 III being a SLR-style mirrorless camera and the Pentax 645D being a Large SLR camera.
Before delving into a more detailed comparison, here is a simple introduction of how the E-M5 III grades against the 645D in terms of portability, imaging, features and an overall score.
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Below is a sample of the gallery pics for Olympus OM-D E-M5 III & Pentax 645D. The whole galleries are available at Olympus E-M5 III Gallery & Pentax 645D Gallery.
Reasons to pick Olympus E-M5 III over the Pentax 645D
| E-M5 III | 645D | |||
|---|---|---|---|---|
| Announced | October 2019 |  | March 2010 | More modern by 117 months |
| Display type | Fully Articulated |  | Fixed | Fully Articulating display |
| Display resolution | 1040k |  | 921k | Clearer display (+119k dot) |
| Selfie screen |  | Take selfies | ||
| Touch display |  | Easily navigate |
Reasons to pick Pentax 645D over the Olympus E-M5 III
| 645D | E-M5 III |
|---|
Common features in the Olympus E-M5 III and Pentax 645D
| E-M5 III | 645D | |||
|---|---|---|---|---|
| Focus manually |  | Very accurate focus | ||
| Display dimensions | 3" |  | 3" | Equal display size |
Olympus E-M5 III vs Pentax 645D Physical Comparison
For anybody who is aiming to carry around your camera frequently, you will need to take into account its weight and proportions. The Olympus E-M5 III has got physical 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) while the Pentax 645D has measurements of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") accompanied by a weight of 1480 grams (3.26 lbs).
See the Olympus E-M5 III and Pentax 645D in our newest Camera & Lens Size Comparison Tool.
Take into consideration, the weight of an ILC will vary dependant on the lens you choose during that time. Below is a front view dimension comparison of the E-M5 III and the 645D.
Factoring in size and weight, the portability rating of the E-M5 III and 645D is 80 and 50 respectively.
Olympus E-M5 III vs Pentax 645D Sensor Comparison
In many cases, it is very difficult to picture the contrast between sensor sizes only by looking at technical specs. The pic here will provide you a clearer sense of the sensor dimensions in the E-M5 III and 645D.
As you have seen, each of the cameras provide different megapixel count and different sensor sizes. The E-M5 III using its tinier sensor is going to make getting shallower DOF tougher and the Pentax 645D will resolve extra detail with its extra 20 Megapixels. Greater resolution can also allow you to crop images more aggressively. The more modern E-M5 III should have a benefit when it comes to sensor tech.
Olympus E-M5 III vs Pentax 645D Screen and ViewFinder
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Olympus E-M5 III vs Pentax 645D Specifications
| Olympus OM-D E-M5 III | Pentax 645D | |
|---|---|---|
| General Information | ||
| Manufacturer | Olympus | Pentax |
| Model type | Olympus OM-D E-M5 III | Pentax 645D |
| Class | Advanced Mirrorless | Pro DSLR |
| Released | 2019-10-17 | 2010-03-10 |
| Body design | SLR-style mirrorless | Large SLR |
| Sensor Information | ||
| Powered by | TruePic VIII | Prime II |
| Sensor type | MOS | CCD |
| Sensor size | Four Thirds | Medium format |
| Sensor dimensions | 17.4 x 13mm | 44 x 33mm |
| Sensor surface area | 226.2mm² | 1,452.0mm² |
| Sensor resolution | 20 megapixel | 40 megapixel |
| Anti alias filter | ||
| Aspect ratio | 1:1, 4:3, 3:2 and 16:9 | 4:3 |
| Max resolution | 5184 x 3888 | 7264 x 5440 |
| Max native ISO | 25600 | 1600 |
| Minimum native ISO | 200 | 200 |
| RAW support | ||
| Minimum enhanced ISO | 64 | 100 |
| Autofocusing | ||
| Focus manually | ||
| Touch focus | ||
| Continuous autofocus | ||
| Single autofocus | ||
| Autofocus tracking | ||
| Autofocus selectice | ||
| Autofocus center weighted | ||
| Autofocus multi area | ||
| Live view autofocus | ||
| Face detect focus | ||
| Contract detect focus | ||
| Phase detect focus | ||
| Total focus points | 121 | 11 |
| Lens | ||
| Lens mount type | Micro Four Thirds | Pentax 645AF2 |
| Number of lenses | 107 | 6 |
| Crop factor | 2.1 | 0.8 |
| Screen | ||
| Range of display | Fully Articulated | Fixed Type |
| Display size | 3 inch | 3 inch |
| Resolution of display | 1,040 thousand dot | 921 thousand dot |
| Selfie friendly | ||
| Liveview | ||
| Touch screen | ||
| Display technology | - | TFT Color LCD with wide-viewing angle and with AR coating |
| Viewfinder Information | ||
| Viewfinder | Electronic | Optical (pentaprism) |
| Viewfinder resolution | 2,360 thousand dot | - |
| Viewfinder coverage | 100% | 98% |
| Viewfinder magnification | 0.68x | 0.85x |
| Features | ||
| Minimum shutter speed | 60 secs | 30 secs |
| Fastest shutter speed | 1/8000 secs | 1/4000 secs |
| Fastest quiet shutter speed | 1/32000 secs | - |
| Continuous shutter speed | 30.0 frames/s | 1.0 frames/s |
| Shutter priority | ||
| Aperture priority | ||
| Manual exposure | ||
| Exposure compensation | Yes | Yes |
| Change white balance | ||
| Image stabilization | ||
| Inbuilt flash | ||
| Flash distance | no built-in flash | no built-in flash |
| Flash options | Auto, redeye, fill, off, redeye slow sync, slow sync, 2nd-curtain slow sync, manual | Auto, On, Off, Red-eye, Slow Sync, Rear Curtain |
| Hot shoe | ||
| AE bracketing | ||
| WB bracketing | ||
| Fastest flash sync | 1/250 secs | 1/125 secs |
| Exposure | ||
| Multisegment exposure | ||
| Average exposure | ||
| Spot exposure | ||
| Partial exposure | ||
| AF area exposure | ||
| Center weighted exposure | ||
| Video features | ||
| Video resolutions | 4096 x 2160 @ 24p / 237 Mbps, MOV, H.264, Linear PCM | - |
| Max video resolution | 4096x2160 | None |
| Video data format | MPEG-4, H.264 | - |
| Mic input | ||
| Headphone input | ||
| Connectivity | ||
| Wireless | Built-In | None |
| Bluetooth | ||
| NFC | ||
| HDMI | ||
| USB | USB 2.0 (480 Mbit/sec) | USB 2.0 (480 Mbit/sec) |
| GPS | None | None |
| Physical | ||
| Environment seal | ||
| Water proofing | ||
| Dust proofing | ||
| Shock proofing | ||
| Crush proofing | ||
| Freeze proofing | ||
| Weight | 414g (0.91 pounds) | 1480g (3.26 pounds) |
| Physical dimensions | 125 x 85 x 50mm (4.9" x 3.3" x 2.0") | 156 x 117 x 119mm (6.1" x 4.6" x 4.7") |
| DXO scores | ||
| DXO Overall rating | not tested | 82 |
| DXO Color Depth rating | not tested | 24.6 |
| DXO Dynamic range rating | not tested | 12.6 |
| DXO Low light rating | not tested | 1262 |
| Other | ||
| Battery life | 310 photographs | 800 photographs |
| Battery format | Battery Pack | Battery Pack |
| Battery ID | BLN-1 | D-LI90 |
| Self timer | Yes (2 or 10 secs, custom) | Yes (2 or 10 sec) |
| Time lapse recording | ||
| Type of storage | SD/SDHC/SDXC (UHS-II supported) | SD/SDHC |
| Storage slots | 1 | Dual |
| Pricing at release | $1,199 | $4,000 |