Pentax 645D vs Sony A65

Let's look closer at the Pentax 645D vs Sony A65, one being a Pro DSLR and the other is a Entry-Level DSLR by brands Pentax and Sony. There exists a sizeable gap among the sensor resolutions of the 645D (40MP) and A65 (24MP) and the 645D (Medium format) and A65 (APS-C) posses different sensor sizing.

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The 645D was announced 20 months earlier than the A65 making them a generation apart from one another. Both of the cameras have different body design with the Pentax 645D being a Large SLR camera and the Sony A65 being a Compact SLR camera.

Before delving straight to a more detailed comparison, here is a concise view of how the 645D grades versus the A65 in the way of portability, imaging, features and an overall grade.

Here is a sample of the gallery pics for Pentax 645D and Sony SLT-A65. The whole galleries are provided at Pentax 645D Gallery and Sony A65 Gallery.

In case you're planning to lug around your camera often, you are going to need to factor its weight and proportions. The Pentax 645D has got exterior dimensions of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") with a weight of 1480 grams (3.26 lbs) while the Sony A65 has measurements of 132mm x 97mm x 81mm (5.2" x 3.8" x 3.2") with a weight of 622 grams (1.37 lbs).

Look at the Pentax 645D vs Sony A65 in the new Camera with Lens Size Comparison Tool.

Remember, the weight of an Interchangeable Lens Camera will change dependant on the lens you are employing at that moment. Below is a front view over all size comparison of the 645D vs the A65.

Taking into account dimensions and weight, the portability score of the 645D and A65 is 50 and 64 respectively.

Normally, it is tough to imagine the gap in sensor measurements merely by seeing specs. The graphic underneath will help provide you a clearer sense of the sensor dimensions in the 645D and A65.

All in all, both of those cameras provide different megapixels and different sensor measurements. The 645D having a larger sensor is going to make achieving shallow DOF less difficult and the Pentax 645D will produce greater detail with its extra 16 Megapixels. Greater resolution will also enable you to crop photos more aggressively. The older 645D will be disadvantaged when it comes to sensor tech.