Pentax 645Z vs Sony RX100 III

Here, we are evaluating the Pentax 645Z versus Sony RX100 III, former being a Pro DSLR while the other is a Large Sensor Compact by brands Pentax and Sony. There is a substantial difference between the image resolutions of the 645Z (51MP) and RX100 III (20MP) and the 645Z (Medium format) and RX100 III (1") boast different sensor sizing.

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The 645Z was released within a month of the RX100 III so they are both of a similar age. Each of these cameras feature different body design with the Pentax 645Z being a Large SLR camera and the Sony RX100 III being a Large Sensor Compact camera.

Before delving right into a in depth comparison, here is a quick summary of how the 645Z scores versus the RX100 III with respect to portability, imaging, features and an overall rating.

Following is a sample of the gallery pictures for Pentax 645Z & Sony Cyber-shot DSC-RX100 III. The complete galleries are available at Pentax 645Z Gallery & Sony RX100 III Gallery.

For those who are intending to carry your camera often, you are going to need to factor in its weight and dimensions. The Pentax 645Z offers outside measurements of 156mm x 117mm x 123mm (6.1" x 4.6" x 4.8") accompanied by a weight of 1550 grams (3.42 lbs) while the Sony RX100 III has dimensions of 102mm x 58mm x 41mm (4.0" x 2.3" x 1.6") with a weight of 290 grams (0.64 lbs).

Check out the Pentax 645Z versus Sony RX100 III in our newest Camera plus Lens Size Comparison Tool.

Take into account, the weight of an ILC will change dependant on the lens you use at that time. Following is a front view proportions comparison of the 645Z versus the RX100 III.

Looking at size and weight, the portability rating of the 645Z and RX100 III is 49 and 89 respectively.

Usually, it can be hard to visualize the gap between sensor sizing merely by checking a spec sheet. The graphic underneath should provide you a greater sense of the sensor measurements in the 645Z and RX100 III.

As you can see, the two cameras feature different megapixel count and different sensor sizing. The 645Z due to its larger sensor is going to make getting bokeh easier and the Pentax 645Z will give extra detail as a result of its extra 31MP. Greater resolution can also enable you to crop photos way more aggressively.