Pentax 645Z vs Sony A9 II

On this page, we will be contrasting the Pentax 645Z vs Sony A9 II, former is a Pro DSLR while the latter is a Pro Mirrorless by companies Pentax and Sony. There is a substantial difference among the sensor resolutions of the 645Z (51MP) and A9 II (24MP) and the 645Z (Medium format) and A9 II (Full frame) boast totally different sensor size.

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The 645Z was released 6 years earlier than the A9 II which is a fairly big difference as far as camera tech is concerned. The two cameras have different body design with the Pentax 645Z being a Large SLR camera and the Sony A9 II being a SLR-style mirrorless camera.

Before getting into a more detailed comparison, here is a brief introduction of how the 645Z matches up versus the A9 II with respect to portability, imaging, features and an overall score.

Following is a preview of the gallery photos for Pentax 645Z & Sony Alpha A9 Mark II. The complete galleries are provided at Pentax 645Z Gallery & Sony A9 II Gallery.

For those who are looking to carry around your camera frequently, you will need to factor in its weight and volume. The Pentax 645Z has got external dimensions of 156mm x 117mm x 123mm (6.1" x 4.6" x 4.8") accompanied by a weight of 1550 grams (3.42 lbs) whilst the Sony A9 II has sizing of 129mm x 96mm x 76mm (5.1" x 3.8" x 3.0") having a weight of 678 grams (1.49 lbs).

See the Pentax 645Z vs Sony A9 II in our newest Camera & Lens Size Comparison Tool.

Do not forget, the weight of an ILC will differ based on the lens you are utilizing at that time. Here is a front view measurements comparison of the 645Z against the A9 II.

Using size and weight, the portability score of the 645Z and A9 II is 49 and 62 respectively.

Generally, it can be hard to visualise the gap in sensor sizes only by researching a spec sheet. The picture underneath may provide you a greater sense of the sensor dimensions in the 645Z and A9 II.

Clearly, both of those cameras have different megapixel count and different sensor sizes. The 645Z because of its bigger sensor will make achieving shallower depth of field simpler and the Pentax 645Z will render extra detail as a result of its extra 27 Megapixels. Higher resolution can also make it easier to crop shots a bit more aggressively. The more aged 645Z will be disadvantaged when it comes to sensor innovation.