Pentax 645D vs Sony NEX-3
50 Imaging
75 Features
52 Overall
65
89 Imaging
54 Features
55 Overall
54
Pentax 645D vs Sony NEX-3 Key Specs
(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
- Updated by Pentax 645Z
(Full Review)
- 14MP - APS-C Sensor
- 3" Tilting Screen
- ISO 200 - 12800
- 1280 x 720 video
- Sony E Mount
- 297g - 117 x 62 x 33mm
- Released June 2010
- Successor is Sony NEX-C3
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Lets look a bit more closely at the Pentax 645D versus Sony NEX-3, former is a Pro DSLR while the latter is a Entry-Level Mirrorless by brands Pentax and Sony. There is a sizable difference between the resolutions of the 645D (40MP) and NEX-3 (14MP) and the 645D (Medium format) and NEX-3 (APS-C) feature different sensor sizes.
Meta to Introduce 'AI-Generated' Labels for Media starting next monthThe 645D was unveiled 2 months earlier than the NEX-3 so they are of a similar age. Both of these cameras come with different body type with the Pentax 645D being a Large SLR camera and the Sony NEX-3 being a Rangefinder-style mirrorless camera.
Before delving in to a in-depth comparison, below is a simple summation of how the 645D scores vs the NEX-3 in relation to portability, imaging, features and an overall score.
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The following is a preview of the gallery images for Pentax 645D & Sony Alpha NEX-3. The full galleries are provided at Pentax 645D Gallery & Sony NEX-3 Gallery.
Reasons to pick Pentax 645D over the Sony NEX-3
| 645D | NEX-3 | |||
|---|---|---|---|---|
| Screen resolution | 921k |  | 920k | Sharper screen (+1k dot) |
Reasons to pick Sony NEX-3 over the Pentax 645D
| NEX-3 | 645D | |||
|---|---|---|---|---|
| Screen type | Tilting |  | Fixed | Tilting screen |
Common features in the Pentax 645D and Sony NEX-3
| 645D | NEX-3 | |||
|---|---|---|---|---|
| Released | March 2010 |  | June 2010 | Similar age |
| Manual focus |  | Dial exact focus | ||
| Screen dimension | 3" |  | 3" | Identical screen dimensions |
| Selfie screen |  | Neither contains selfie screen | ||
| Touch friendly screen |  | Neither contains Touch friendly screen |
Pentax 645D vs Sony NEX-3 Physical Comparison
If you are aiming to carry around your camera, you have to factor in its weight and measurements. The Pentax 645D has got external 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) whilst the Sony NEX-3 has proportions of 117mm x 62mm x 33mm (4.6" x 2.4" x 1.3") along with a weight of 297 grams (0.65 lbs).
Check the Pentax 645D versus Sony NEX-3 in our brand new Camera plus Lens Size Comparison Tool.
Do not forget, the weight of an ILC will differ based on the lens you have during that time. Below is the front view over all size comparison of the 645D against the NEX-3.
Taking into account size and weight, the portability rating of the 645D and NEX-3 is 50 and 89 respectively.
Pentax 645D vs Sony NEX-3 Sensor Comparison
Generally, it is hard to imagine the difference between sensor sizes just by reviewing a spec sheet. The image here will offer you a stronger sense of the sensor measurements in the 645D and NEX-3.
Clearly, both the cameras posses different megapixel count and different sensor sizes. The 645D using its bigger sensor is going to make achieving shallow DOF easier and the Pentax 645D will offer more detail having an extra 26 Megapixels. Higher resolution will also allow you to crop shots somewhat more aggressively.
Pentax 645D vs Sony NEX-3 Screen and ViewFinder
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Pentax 645D vs Sony NEX-3 Specifications
| Pentax 645D | Sony Alpha NEX-3 | |
|---|---|---|
| General Information | ||
| Brand Name | Pentax | Sony |
| Model | Pentax 645D | Sony Alpha NEX-3 |
| Type | Pro DSLR | Entry-Level Mirrorless |
| Launched | 2010-03-10 | 2010-06-07 |
| Physical type | Large SLR | Rangefinder-style mirrorless |
| Sensor Information | ||
| Processor Chip | Prime II | Bionz |
| Sensor type | CCD | CMOS |
| Sensor size | Medium format | APS-C |
| Sensor dimensions | 44 x 33mm | 23.4 x 15.6mm |
| Sensor surface area | 1,452.0mm² | 365.0mm² |
| Sensor resolution | 40MP | 14MP |
| Anti aliasing filter | ||
| Aspect ratio | 4:3 | 3:2 and 16:9 |
| Max resolution | 7264 x 5440 | 4592 x 3056 |
| Max native ISO | 1600 | 12800 |
| Minimum native ISO | 200 | 200 |
| RAW pictures | ||
| Minimum enhanced ISO | 100 | - |
| Autofocusing | ||
| Focus manually | ||
| Autofocus touch | ||
| Continuous autofocus | ||
| Single autofocus | ||
| Autofocus tracking | ||
| Selective autofocus | ||
| Autofocus center weighted | ||
| Autofocus multi area | ||
| Autofocus live view | ||
| Face detect autofocus | ||
| Contract detect autofocus | ||
| Phase detect autofocus | ||
| Number of focus points | 11 | 25 |
| Lens | ||
| Lens mounting type | Pentax 645AF2 | Sony E |
| Total lenses | 6 | 121 |
| Focal length multiplier | 0.8 | 1.5 |
| Screen | ||
| Type of display | Fixed Type | Tilting |
| Display size | 3 inch | 3 inch |
| Resolution of display | 921k dots | 920k dots |
| Selfie friendly | ||
| Liveview | ||
| Touch capability | ||
| Display technology | TFT Color LCD with wide-viewing angle and with AR coating | TFT Xtra Fine LCD |
| Viewfinder Information | ||
| Viewfinder | Optical (pentaprism) | None |
| Viewfinder coverage | 98 percent | - |
| Viewfinder magnification | 0.85x | - |
| Features | ||
| Min shutter speed | 30 secs | 30 secs |
| Max shutter speed | 1/4000 secs | 1/4000 secs |
| Continuous shutter rate | 1.0 frames/s | 7.0 frames/s |
| Shutter priority | ||
| Aperture priority | ||
| Manually set exposure | ||
| Exposure compensation | Yes | Yes |
| Change white balance | ||
| Image stabilization | ||
| Built-in flash | ||
| Flash range | no built-in flash | 12.00 m |
| Flash modes | Auto, On, Off, Red-eye, Slow Sync, Rear Curtain | Auto, On, Off, Red-Eye, Slow Sync, Rear Curtain, Fill-in |
| Hot shoe | ||
| AE bracketing | ||
| WB bracketing | ||
| Max flash synchronize | 1/125 secs | 1/160 secs |
| Exposure | ||
| Multisegment exposure | ||
| Average exposure | ||
| Spot exposure | ||
| Partial exposure | ||
| AF area exposure | ||
| Center weighted exposure | ||
| Video features | ||
| Supported video resolutions | - | 1280 x 720 (30 fps), 640 x 480 (30 fps) |
| Max video resolution | None | 1280x720 |
| Video format | - | MPEG-4 |
| Mic port | ||
| Headphone port | ||
| Connectivity | ||
| Wireless | None | Eye-Fi Connected |
| Bluetooth | ||
| NFC | ||
| HDMI | ||
| USB | USB 2.0 (480 Mbit/sec) | USB 2.0 (480 Mbit/sec) |
| GPS | None | None |
| Physical | ||
| Environmental sealing | ||
| Water proof | ||
| Dust proof | ||
| Shock proof | ||
| Crush proof | ||
| Freeze proof | ||
| Weight | 1480g (3.26 lb) | 297g (0.65 lb) |
| Dimensions | 156 x 117 x 119mm (6.1" x 4.6" x 4.7") | 117 x 62 x 33mm (4.6" x 2.4" x 1.3") |
| DXO scores | ||
| DXO Overall score | 82 | 68 |
| DXO Color Depth score | 24.6 | 22.1 |
| DXO Dynamic range score | 12.6 | 12.0 |
| DXO Low light score | 1262 | 830 |
| Other | ||
| Battery life | 800 images | 330 images |
| Battery type | Battery Pack | Battery Pack |
| Battery model | D-LI90 | NPFW50 |
| Self timer | Yes (2 or 10 sec) | Yes (2 or 10 sec, 10sec (3 images)) |
| Time lapse feature | ||
| Storage type | SD/SDHC | SD/ SDHC/SDXC, Memory Stick Pro Duo/ Pro-HG Duo |
| Card slots | Dual | 1 |
| Cost at release | $4,000 | $0 |