Pentax 645D vs Sony A550
50 Imaging
75 Features
52 Overall
65
63 Imaging
53 Features
65 Overall
57
Pentax 645D vs Sony A550 Key Specs
(Full Review)
- 40MP - Medium format Sensor
- 3" Fixed Screen
- ISO 200 - 1600
- No Anti-Alias Filter
- No Video
- Pentax 645AF2 Mount
- 1480g - 156 x 117 x 119mm
- Revealed March 2010
- Successor is Pentax 645Z
(Full Review)
- 14MP - APS-C Sensor
- 3" Tilting Screen
- ISO 200 - 12800
- Sensor based Image Stabilization
- No Video
- Sony/Minolta Alpha Mount
- 632g - 137 x 104 x 84mm
- Introduced December 2009
- Succeeded the Sony A100
Snapchat Adds Watermarks to AI-Created Images Pentax 645D vs Sony A550 Overview
On this page, we will be matching up the Pentax 645D and Sony A550, former is a Pro DSLR while the latter is a Entry-Level DSLR by competitors Pentax and Sony. There is a large difference between the image resolutions of the 645D (40MP) and A550 (14MP) and the 645D (Medium format) and A550 (APS-C) posses different sensor sizes.
Apple Innovates by Creating Next-Level Optical Stabilization for iPhoneThe 645D was introduced 4 months after the A550 so they are of a similar age. Both of these cameras have different body design with the Pentax 645D being a Large SLR camera and the Sony A550 being a Compact SLR camera.
Before going into a in depth comparison, here is a quick summation of how the 645D scores against the A550 with regard to portability, imaging, features and an overall score.
Photography Glossary Pentax 645D vs Sony A550 Gallery
Below is a preview of the gallery photos for Pentax 645D & Sony Alpha DSLR-A550. The whole galleries are viewable at Pentax 645D Gallery & Sony A550 Gallery.
Reasons to pick Pentax 645D over the Sony A550
| 645D | A550 |
|---|
Reasons to pick Sony A550 over the Pentax 645D
| A550 | 645D | |||
|---|---|---|---|---|
| Screen type | Tilting |  | Fixed | Tilting screen |
| Screen resolution | 922k |  | 921k | Crisper screen (+1k dot) |
Common features in the Pentax 645D and Sony A550
| 645D | A550 | |||
|---|---|---|---|---|
| Introduced | March 2010 |  | December 2009 | Similar age |
| Manually focus |  | More precise focus | ||
| Screen dimensions | 3" |  | 3" | Equal screen dimensions |
| Selfie screen |  | Missing selfie screen | ||
| Touch screen |  | Missing Touch screen |
Pentax 645D vs Sony A550 Physical Comparison
For those who are intending to carry around your camera, you have to factor its weight and dimensions. The Pentax 645D enjoys outside dimensions of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") having a weight of 1480 grams (3.26 lbs) while the Sony A550 has dimensions of 137mm x 104mm x 84mm (5.4" x 4.1" x 3.3") with a weight of 632 grams (1.39 lbs).
Look at the Pentax 645D and Sony A550 in our brand new Camera & Lens Size Comparison Tool.
Don't forget, the weight of an ILC will change depending on the lens you use at the time. Following is a front view dimensions comparison of the 645D against the A550.
Looking at size and weight, the portability rating of the 645D and A550 is 50 and 63 respectively.
Pentax 645D vs Sony A550 Sensor Comparison
Usually, it is very tough to picture the contrast between sensor sizes only by looking at specifications. The image here might provide you a far better sense of the sensor dimensions in the 645D and A550.
Plainly, the 2 cameras provide different megapixels and different sensor sizes. The 645D using its bigger sensor is going to make shooting shallower DOF less difficult and the Pentax 645D will give more detail using its extra 26 Megapixels. Higher resolution can also let you crop shots more aggressively.
Pentax 645D vs Sony A550 Screen and ViewFinder
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Pentax 645D vs Sony A550 Specifications
| Pentax 645D | Sony Alpha DSLR-A550 | |
|---|---|---|
| General Information | ||
| Make | Pentax | Sony |
| Model type | Pentax 645D | Sony Alpha DSLR-A550 |
| Category | Pro DSLR | Entry-Level DSLR |
| Revealed | 2010-03-10 | 2009-12-09 |
| Physical type | Large SLR | Compact SLR |
| 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 | 40 megapixels | 14 megapixels |
| Anti alias filter | ||
| Aspect ratio | 4:3 | 3:2 and 16:9 |
| Max resolution | 7264 x 5440 | 4592 x 3056 |
| Max native ISO | 1600 | 12800 |
| Min native ISO | 200 | 200 |
| RAW format | ||
| Min enhanced ISO | 100 | - |
| Autofocusing | ||
| Manual focusing | ||
| AF touch | ||
| Continuous AF | ||
| Single AF | ||
| Tracking AF | ||
| AF selectice | ||
| AF center weighted | ||
| AF multi area | ||
| Live view AF | ||
| Face detection AF | ||
| Contract detection AF | ||
| Phase detection AF | ||
| Total focus points | 11 | 9 |
| Lens | ||
| Lens support | Pentax 645AF2 | Sony/Minolta Alpha |
| Total lenses | 6 | 143 |
| Crop factor | 0.8 | 1.5 |
| Screen | ||
| Type of screen | Fixed Type | Tilting |
| Screen diagonal | 3 inch | 3 inch |
| Resolution of screen | 921k dots | 922k dots |
| Selfie friendly | ||
| Liveview | ||
| Touch functionality | ||
| Screen technology | TFT Color LCD with wide-viewing angle and with AR coating | - |
| Viewfinder Information | ||
| Viewfinder type | Optical (pentaprism) | Optical (pentamirror) |
| Viewfinder coverage | 98 percent | 95 percent |
| Viewfinder magnification | 0.85x | 0.53x |
| Features | ||
| Min shutter speed | 30s | 30s |
| Max shutter speed | 1/4000s | 1/4000s |
| Continuous shutter rate | 1.0 frames/s | 7.0 frames/s |
| Shutter priority | ||
| Aperture priority | ||
| Expose Manually | ||
| Exposure compensation | Yes | Yes |
| Set WB | ||
| Image stabilization | ||
| Integrated flash | ||
| Flash distance | no built-in flash | 12.00 m |
| Flash settings | Auto, On, Off, Red-eye, Slow Sync, Rear Curtain | Auto, On, Off, Red-Eye, Slow Sync, High Speed Sync, Rear Curtain, Fill-in, Wireless |
| Hot shoe | ||
| AE bracketing | ||
| White balance bracketing | ||
| Max flash synchronize | 1/125s | 1/160s |
| Exposure | ||
| Multisegment metering | ||
| Average metering | ||
| Spot metering | ||
| Partial metering | ||
| AF area metering | ||
| Center weighted metering | ||
| Video features | ||
| Max video resolution | None | None |
| Mic support | ||
| Headphone support | ||
| Connectivity | ||
| Wireless | None | None |
| Bluetooth | ||
| NFC | ||
| HDMI | ||
| USB | USB 2.0 (480 Mbit/sec) | USB 2.0 (480 Mbit/sec) |
| GPS | None | None |
| Physical | ||
| Environment sealing | ||
| Water proofing | ||
| Dust proofing | ||
| Shock proofing | ||
| Crush proofing | ||
| Freeze proofing | ||
| Weight | 1480g (3.26 lb) | 632g (1.39 lb) |
| Physical dimensions | 156 x 117 x 119mm (6.1" x 4.6" x 4.7") | 137 x 104 x 84mm (5.4" x 4.1" x 3.3") |
| DXO scores | ||
| DXO Overall rating | 82 | 66 |
| DXO Color Depth rating | 24.6 | 21.9 |
| DXO Dynamic range rating | 12.6 | 11.8 |
| DXO Low light rating | 1262 | 807 |
| Other | ||
| Battery life | 800 photographs | 480 photographs |
| Form of battery | Battery Pack | Battery Pack |
| Battery ID | D-LI90 | NP-FM500H |
| Self timer | Yes (2 or 10 sec) | Yes (2 or 10 sec) |
| Time lapse shooting | ||
| Storage type | SD/SDHC | SD/ SDHC, Memory Stick Pro Duo/ Pro-HG Duo |
| Card slots | 2 | 1 |
| Cost at release | $4,000 | $749 |