Pentax 645D vs Sony A330

Here is a detailed review of the Pentax 645D and Sony A330, one being a Pro DSLR and the latter is a Entry-Level DSLR by rivals Pentax and Sony. There exists a big gap among the sensor resolutions of the 645D (40MP) and A330 (10MP) and the 645D (Medium format) and A330 (APS-C) come with different sensor sizing.

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The 645D was manufactured 10 months later than the A330 which means that they are both of a similar generation. Both the cameras offer different body type with the Pentax 645D being a Large SLR camera and the Sony A330 being a Compact SLR camera.

Before diving in to a full comparison, below is a quick view of how the 645D scores against the A330 with respect to portability, imaging, features and an overall rating.

The following is a preview of the gallery images for Pentax 645D and Sony Alpha DSLR-A330. The entire galleries are provided at Pentax 645D Gallery and Sony A330 Gallery.

In case you're looking to carry your camera often, you will have to factor in its weight and size. The Pentax 645D has got exterior dimensions of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") and a weight of 1480 grams (3.26 lbs) while the Sony A330 has specifications of 128mm x 97mm x 71mm (5.0" x 3.8" x 2.8") having a weight of 529 grams (1.17 lbs).

Check out the Pentax 645D and Sony A330 in the new Camera and Lens Size Comparison Tool.

Do not forget, the weight of an Interchangeable Lens Camera will differ based on the lens you are employing during that time. Here is the front view over all size comparison of the 645D against the A330.

Considering dimensions and weight, the portability score of the 645D and A330 is 50 and 67 respectively.

Quite often, its hard to imagine the gap in sensor sizing only by researching specs. The photograph here might give you a clearer sense of the sensor dimensions in the 645D and A330.

All in all, the 2 cameras enjoy different megapixels and different sensor sizing. The 645D featuring a bigger sensor is going to make achieving shallower DOF easier and the Pentax 645D will render greater detail due to its extra 30 Megapixels. Higher resolution can also allow you to crop shots far more aggressively. The fresher 645D provides an edge with regard to sensor tech.