Pentax 645Z vs Sony NEX-3

Below is a detailed analysis of the Pentax 645Z versus Sony NEX-3, one being a Pro DSLR and the other is a Entry-Level Mirrorless by companies Pentax and Sony. There exists a big gap among the resolutions of the 645Z (51MP) and NEX-3 (14MP) and the 645Z (Medium format) and NEX-3 (APS-C) come with different sensor dimensions.

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The 645Z was brought out 3 years later than the NEX-3 and that is a fairly big gap as far as camera technology is concerned. Both of these cameras come with different body type with the Pentax 645Z being a Large SLR camera and the Sony NEX-3 being a Rangefinder-style mirrorless camera.

Before delving in to a detailed comparison, below is a concise view of how the 645Z grades vs the NEX-3 in regards to portability, imaging, features and an overall grade.

The following is a sample of the gallery pics for Pentax 645Z and Sony Alpha NEX-3. The entire galleries are provided at Pentax 645Z Gallery and Sony NEX-3 Gallery.

For anyone who is planning to lug around your camera often, you'll have to factor its weight and size. The Pentax 645Z provides physical measurements of 156mm x 117mm x 123mm (6.1" x 4.6" x 4.8") with a weight of 1550 grams (3.42 lbs) and the Sony NEX-3 has specifications of 117mm x 62mm x 33mm (4.6" x 2.4" x 1.3") along with a weight of 297 grams (0.65 lbs).

Take a look at the Pentax 645Z versus Sony NEX-3 in the new Camera with Lens Size Comparison Tool.

Remember that, the weight of an Interchangeable Lens Camera will change based on the lens you are working with during that time. Here is the front view scale comparison of the 645Z and the NEX-3.

Using dimensions and weight, the portability grade of the 645Z and NEX-3 is 49 and 89 respectively.

Quite often, it's tough to imagine the difference in sensor measurements merely by looking through technical specs. The graphic here will help offer you a clearer sense of the sensor sizing in the 645Z and NEX-3.

As you have seen, both the cameras posses different megapixel count and different sensor measurements. The 645Z featuring a larger sensor is going to make achieving shallow DOF easier and the Pentax 645Z will render greater detail having its extra 37MP. Greater resolution will help you crop photos somewhat more aggressively. The more recent 645Z provides a benefit with regard to sensor innovation.