Olympus E-M10 IV vs Pentax 645D
81 Imaging
62 Features
83 Overall
70
50 Imaging
76 Features
52 Overall
66
Olympus E-M10 IV vs Pentax 645D Key Specs
(Full Review)
- 20MP - Four Thirds Sensor
- 3" Tilting Display
- ISO 200 - 25600
- Sensor based 5-axis Image Stabilization
- 3840 x 2160 video
- Micro Four Thirds Mount
- 383g - 122 x 84 x 49mm
- Announced August 2020
- Previous Model is Olympus E-M10 III
(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
- Launched March 2010
- Replacement is Pentax 645Z
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Its time to look much closer at the Olympus E-M10 IV and Pentax 645D, former being a Entry-Level Mirrorless while the other is a Pro DSLR by brands Olympus and Pentax. There is a large difference between the sensor resolutions of the E-M10 IV (20MP) and 645D (40MP) and the E-M10 IV (Four Thirds) and 645D (Medium format) use totally different sensor size.
President Biden pushes bill mandating TikTok sale or banThe E-M10 IV was released 10 years later than the 645D and that is quite a serious difference as far as tech is concerned. Each of these cameras offer different body type with the Olympus E-M10 IV being a SLR-style mirrorless camera and the Pentax 645D being a Large SLR camera.
Before getting straight into a comprehensive comparison, below is a quick highlight of how the E-M10 IV scores vs the 645D with regards to portability, imaging, features and an overall grade.
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The following is a sample of the gallery pics for Olympus OM-D E-M10 IV & Pentax 645D. The complete galleries are available at Olympus E-M10 IV Gallery & Pentax 645D Gallery.
Reasons to pick Olympus E-M10 IV over the Pentax 645D
| E-M10 IV | 645D | |||
|---|---|---|---|---|
| Launched | August 2020 |  | March 2010 | More recent by 127 months |
| Display type | Tilting |  | Fixed | Tilting display |
| Display resolution | 1040k |  | 921k | Crisper display (+119k dot) |
| Selfie screen |  | Easy selfies | ||
| Touch friendly display |  | Easily navigate |
Reasons to pick Pentax 645D over the Olympus E-M10 IV
| 645D | E-M10 IV |
|---|
Common features in the Olympus E-M10 IV and Pentax 645D
| E-M10 IV | 645D | |||
|---|---|---|---|---|
| Focus manually |  | Very exact focusing | ||
| Display sizing | 3" |  | 3" | Equivalent display size |
Olympus E-M10 IV vs Pentax 645D Physical Comparison
When you are planning to lug around your camera often, you will have to think about its weight and size. The Olympus E-M10 IV enjoys physical measurements of 122mm x 84mm x 49mm (4.8" x 3.3" x 1.9") accompanied by a weight of 383 grams (0.84 lbs) whilst the Pentax 645D has specifications 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-M10 IV and Pentax 645D in our completely new Camera & Lens Size Comparison Tool.
Don't forget, the weight of an ILC will differ depending on the lens you are utilising at that time. The following is the front view dimensions comparison of the E-M10 IV vs the 645D.
Looking at size and weight, the portability score of the E-M10 IV and 645D is 81 and 50 respectively.
Olympus E-M10 IV vs Pentax 645D Sensor Comparison
Oftentimes, it is hard to visualise the gap between sensor measurements only by checking specs. The visual below should offer you a far better sense of the sensor measurements in the E-M10 IV and 645D.
All in all, the 2 cameras offer different resolutions and different sensor measurements. The E-M10 IV due to its tinier sensor will make getting shallow DOF more challenging and the Pentax 645D will give you more detail as a result of its extra 20 Megapixels. Greater resolution will also let you crop pics a little more aggressively. The younger E-M10 IV will have an edge when it comes to sensor tech.
Olympus E-M10 IV vs Pentax 645D Screen and ViewFinder
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Olympus E-M10 IV vs Pentax 645D Specifications
| Olympus OM-D E-M10 IV | Pentax 645D | |
|---|---|---|
| General Information | ||
| Make | Olympus | Pentax |
| Model | Olympus OM-D E-M10 IV | Pentax 645D |
| Category | Entry-Level Mirrorless | Pro DSLR |
| Announced | 2020-08-04 | 2010-03-10 |
| Physical type | SLR-style mirrorless | Large SLR |
| Sensor Information | ||
| Processor Chip | TruePic VIII | Prime II |
| Sensor type | CMOS | 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 megapixels | 40 megapixels |
| Anti aliasing filter | ||
| Aspect ratio | 1:1, 4:3, 3:2 and 16:9 | 4:3 |
| Full resolution | 5184 x 3888 | 7264 x 5440 |
| Max native ISO | 25600 | 1600 |
| Minimum native ISO | 200 | 200 |
| RAW data | ||
| Minimum boosted ISO | 100 | 100 |
| Autofocusing | ||
| Focus manually | ||
| Touch focus | ||
| AF continuous | ||
| Single AF | ||
| Tracking AF | ||
| AF selectice | ||
| AF center weighted | ||
| Multi area AF | ||
| Live view AF | ||
| Face detect AF | ||
| Contract detect AF | ||
| Phase detect AF | ||
| Number of focus points | 121 | 11 |
| Lens | ||
| Lens mount | Micro Four Thirds | Pentax 645AF2 |
| Total lenses | 107 | 6 |
| Crop factor | 2.1 | 0.8 |
| Screen | ||
| Type of display | Tilting | Fixed Type |
| Display sizing | 3 inch | 3 inch |
| Resolution of display | 1,040k dots | 921k dots |
| Selfie friendly | ||
| Liveview | ||
| Touch operation | ||
| Display technology | - | TFT Color LCD with wide-viewing angle and with AR coating |
| Viewfinder Information | ||
| Viewfinder | Electronic | Optical (pentaprism) |
| Viewfinder resolution | 2,360k dots | - |
| Viewfinder coverage | 100 percent | 98 percent |
| Viewfinder magnification | 0.62x | 0.85x |
| Features | ||
| Slowest shutter speed | 60 secs | 30 secs |
| Maximum shutter speed | 1/4000 secs | 1/4000 secs |
| Maximum quiet shutter speed | 1/16000 secs | - |
| Continuous shooting rate | 8.7 frames per sec | 1.0 frames per sec |
| Shutter priority | ||
| Aperture priority | ||
| Expose Manually | ||
| Exposure compensation | Yes | Yes |
| Custom WB | ||
| Image stabilization | ||
| Inbuilt flash | ||
| Flash range | 7.20 m (at ISO 200) | no built-in flash |
| Flash modes | Redeye, fill-in, off, redeye slow-sync (1st-curtain), slow sync (1st-curtain), slow sync (2nd-curtain), manual | Auto, On, Off, Red-eye, Slow Sync, Rear Curtain |
| Hot shoe | ||
| AE bracketing | ||
| WB bracketing | ||
| Maximum flash synchronize | 1/250 secs | 1/125 secs |
| Exposure | ||
| Multisegment exposure | ||
| Average exposure | ||
| Spot exposure | ||
| Partial exposure | ||
| AF area exposure | ||
| Center weighted exposure | ||
| Video features | ||
| Supported video resolutions | 3840 x 2160 @ 30p / 102 Mbps, MOV, H.264, Linear PCM3840 x 2160 @ 25p / 102 Mbps, MOV, H.264, Linear PCM3840 x 2160 @ 24p / 102 Mbps, MOV, H.264, Linear PCM1920 x 1080 @ 60p / 52 Mbps, MOV, H.264, Linear PCM1920 x 1080 @ 50p / 52 Mbps, MOV, H.264, Linear PCM1920 x 1080 @ 30p / 52 Mbps, MOV, H.264, Linear PCM1920 x 1080 @ 25p / 52 Mbps, MOV, H.264, Linear PCM1920 x 1080 @ 24p / 52 Mbps, MOV, H.264, Linear PCM | - |
| Max video resolution | 3840x2160 | None |
| Video file format | MPEG-4, H.264 | - |
| Mic port | ||
| Headphone port | ||
| 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 sealing | ||
| Water proof | ||
| Dust proof | ||
| Shock proof | ||
| Crush proof | ||
| Freeze proof | ||
| Weight | 383g (0.84 lb) | 1480g (3.26 lb) |
| Dimensions | 122 x 84 x 49mm (4.8" x 3.3" x 1.9") | 156 x 117 x 119mm (6.1" x 4.6" x 4.7") |
| DXO scores | ||
| DXO All around score | not tested | 82 |
| DXO Color Depth score | not tested | 24.6 |
| DXO Dynamic range score | not tested | 12.6 |
| DXO Low light score | not tested | 1262 |
| Other | ||
| Battery life | 360 shots | 800 shots |
| Style of battery | Battery Pack | Battery Pack |
| Battery model | BLS-50 | D-LI90 |
| Self timer | Yes (2 or 12 sec, custom) | Yes (2 or 10 sec) |
| Time lapse feature | ||
| Storage type | SD/SDHC/SDXC (UHS-II supported) | SD/SDHC |
| Card slots | 1 | Two |
| Cost at launch | $699 | $4,000 |