Pentax 645D vs Sony T900

Below, we will be evaluating the Pentax 645D and Sony T900, former is a Pro DSLR while the latter is a Ultracompact by competitors Pentax and Sony. There exists a noticeable gap between the sensor resolutions of the 645D (40MP) and T900 (12MP) and the 645D (Medium format) and T900 (1/2.3") possess totally different sensor measurements.

Photography Glossary

The 645D was announced 13 months after the T900 which makes the cameras a generation away from one another. The two cameras come with different body type with the Pentax 645D being a Large SLR camera and the Sony T900 being a Ultracompact camera.

Before diving through a comprehensive comparison, below is a simple highlight of how the 645D scores vs the T900 in the way of portability, imaging, features and an overall score.

This is a preview of the gallery photos for Pentax 645D & Sony Cyber-shot DSC-T900. The whole galleries are available at Pentax 645D Gallery & Sony T900 Gallery.

In case you're looking to carry around your camera frequently, you'll need to take into account its weight and size. The Pentax 645D enjoys outside measurements 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 T900 has specifications of 98mm x 58mm x 16mm (3.9" x 2.3" x 0.6") with a weight of 143 grams (0.32 lbs).

Examine the Pentax 645D and Sony T900 in our completely new Camera & Lens Size Comparison Tool.

Keep in mind, the weight of an ILC will differ depending on the lens you are working with at the time. Underneath is the front view scale comparison of the 645D compared to the T900.

Taking into consideration dimensions and weight, the portability rating of the 645D and T900 is 50 and 96 respectively.

Sometimes, it's difficult to visualise the gap between sensor sizes merely by reading through specifications. The picture underneath might provide you a clearer sense of the sensor sizing in the 645D and T900.

Plainly, the 2 cameras have got different megapixels and different sensor sizes. The 645D using its bigger sensor will make achieving shallow DOF less difficult and the Pentax 645D will resolve greater detail with its extra 28 Megapixels. Higher resolution will allow you to crop shots much more aggressively. The more modern 645D is going to have a benefit with regard to sensor technology.