Pentax 645D vs Sony W550

Let's take a deeper look at the Pentax 645D and Sony W550, former being a Pro DSLR while the other is a Ultracompact by competitors Pentax and Sony. There is a substantial difference between the resolutions of the 645D (40MP) and W550 (14MP) and the 645D (Medium format) and W550 (1/2.3") feature different sensor size.

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The 645D was launched 16 months prior to the W550 making the cameras a generation apart from each other. Both of the cameras offer different body type with the Pentax 645D being a Large SLR camera and the Sony W550 being a Ultracompact camera.

Before getting through a step-by-step comparison, below is a concise summation of how the 645D grades vs the W550 in terms of portability, imaging, features and an overall grade.

Here is a sample of the gallery pictures for Pentax 645D & Sony Cyber-shot DSC-W550. The complete galleries are available at Pentax 645D Gallery & Sony W550 Gallery.

For anybody who is looking to lug around your camera frequently, you have to take into account its weight and volume. The Pentax 645D enjoys 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) and the Sony W550 has sizing of 94mm x 56mm x 19mm (3.7" x 2.2" x 0.7") and a weight of 110 grams (0.24 lbs).

Check out the Pentax 645D and Sony W550 in our newest Camera & Lens Size Comparison Tool.

Do not forget, the weight of an ILC will change depending on the lens you select during that time. Below is the front view overall size comparison of the 645D against the W550.

Taking into consideration size and weight, the portability score of the 645D and W550 is 50 and 96 respectively.

In many cases, it can be hard to imagine the difference between sensor measurements just by going over a spec sheet. The graphic below will provide you a greater sense of the sensor sizing in the 645D and W550.

As you can see, both of these cameras offer different megapixel count and different sensor measurements. The 645D due to its larger sensor is going to make achieving shallower depth of field simpler and the Pentax 645D will offer more detail utilizing its extra 26MP. Greater resolution will allow you to crop images a little more aggressively. The older 645D is going to be disadvantaged in sensor tech.