Pentax 645Z vs Pentax K-7

On this page, we will be evaluating the Pentax 645Z versus Pentax K-7, former is a Pro DSLR while the latter is a Advanced DSLR and both are designed by Pentax. There is a noticeable difference among the sensor resolutions of the 645Z (51MP) and K-7 (15MP) and the 645Z (Medium format) and K-7 (APS-C) have totally different sensor measurements.

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The 645Z was unveiled 4 years after the K-7 which is a fairly sizable difference as far as camera tech is concerned. Both of these cameras have different body design with the Pentax 645Z being a Large SLR camera and the Pentax K-7 being a Mid-size SLR camera.

Before delving right into a in depth comparison, here is a quick overview of how the 645Z grades against the K-7 for portability, imaging, features and an overall score.

Here is a preview of the gallery images for Pentax 645Z & Pentax K-7. The full galleries are provided at Pentax 645Z Gallery & Pentax K-7 Gallery.

If you are aiming to carry around your camera, you have to think about its weight and dimensions. The Pentax 645Z enjoys external 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 Pentax K-7 has dimensions of 131mm x 97mm x 73mm (5.2" x 3.8" x 2.9") accompanied by a weight of 750 grams (1.65 lbs).

Take a look at the Pentax 645Z versus Pentax K-7 in our completely new Camera plus Lens Size Comparison Tool.

Bear in mind, the weight of an ILC will change dependant on the lens you have chosen at the time. The following is a front view over all size comparison of the 645Z and the K-7.

Taking into consideration size and weight, the portability grade of the 645Z and K-7 is 49 and 60 respectively.

Often, it can be difficult to envision the gap in sensor sizes simply by seeing technical specs. The pic underneath might give you a better sense of the sensor sizing in the 645Z and K-7.

As you have seen, both of those cameras have different resolutions and different sensor sizes. The 645Z using its bigger sensor will make getting shallower depth of field less difficult and the Pentax 645Z will provide more detail having an extra 36 Megapixels. Higher resolution will also help you crop shots a bit more aggressively. The younger 645Z will have an edge with regard to sensor tech.