Pentax 645Z vs Sony A6400

Here is a extended assessment of the Pentax 645Z vs Sony A6400, former being a Pro DSLR while the latter is a Advanced Mirrorless by companies Pentax and Sony. There is a considerable difference among the sensor resolutions of the 645Z (51MP) and A6400 (24MP) and the 645Z (Medium format) and A6400 (APS-C) come with totally different sensor sizes.

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The 645Z was unveiled 5 years earlier than the A6400 and that is a fairly large difference as far as camera tech is concerned. Both of the cameras come with different body type with the Pentax 645Z being a Large SLR camera and the Sony A6400 being a Rangefinder-style mirrorless camera.

Before diving in to a in-depth comparison, below is a short highlight of how the 645Z scores versus the A6400 when it comes to portability, imaging, features and an overall rating.

Here is a preview of the gallery photos for Pentax 645Z & Sony Alpha a6400. The full galleries are available at Pentax 645Z Gallery & Sony A6400 Gallery.

When you are planning to carry your camera frequently, you are going to need to factor its weight and dimensions. The Pentax 645Z provides outer measurements of 156mm x 117mm x 123mm (6.1" x 4.6" x 4.8") along with a weight of 1550 grams (3.42 lbs) while the Sony A6400 has dimensions of 120mm x 67mm x 50mm (4.7" x 2.6" x 2.0") and a weight of 403 grams (0.89 lbs).

Take a look at the Pentax 645Z vs Sony A6400 in our brand new Camera & Lens Size Comparison Tool.

Remember, the weight of an ILC will change depending on the lens you are working with at the time. Underneath is the front view sizing comparison of the 645Z versus the A6400.

Considering size and weight, the portability rating of the 645Z and A6400 is 49 and 83 respectively.

Generally, it is very difficult to visualise the contrast in sensor sizing purely by looking through a spec sheet. The graphic underneath might offer you a better sense of the sensor sizing in the 645Z and A6400.

Clearly, each of the cameras have got different megapixels and different sensor sizing. The 645Z having a bigger sensor will make shooting shallow depth of field less difficult and the Pentax 645Z will result in more detail having an extra 27 Megapixels. Higher resolution will also let you crop pictures much more aggressively. The older 645Z will be disadvantaged in sensor innovation.