Pentax 645D vs Sony RX100

Below is a extended comparison of the Pentax 645D and Sony RX100, one being a Pro DSLR and the other is a Large Sensor Compact by manufacturers Pentax and Sony. There is a crucial difference between the resolutions of the 645D (40MP) and RX100 (20MP) and the 645D (Medium format) and RX100 (1") possess totally different sensor sizes.

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The 645D was manufactured 3 years prior to the RX100 and that is quite a serious gap as far as tech is concerned. The two cameras come with different body type with the Pentax 645D being a Large SLR camera and the Sony RX100 being a Large Sensor Compact camera.

Before we go in to a in depth comparison, below is a quick summation of how the 645D grades against the RX100 with regards to portability, imaging, features and an overall grade.

Following is a sample of the gallery pictures for Pentax 645D and Sony Cyber-shot DSC-RX100. The entire galleries are provided at Pentax 645D Gallery and Sony RX100 Gallery.

When you are intending to lug around your camera, you will want to take into account its weight and volume. The Pentax 645D provides exterior dimensions of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") having a weight of 1480 grams (3.26 lbs) while the Sony RX100 has sizing of 102mm x 58mm x 36mm (4.0" x 2.3" x 1.4") accompanied by a weight of 240 grams (0.53 lbs).

Analyze the Pentax 645D and Sony RX100 in the new Camera with Lens Size Comparison Tool.

Remember, the weight of an Interchangeable Lens Camera will differ based on the lens you are working with at that time. Below is the front view size comparison of the 645D compared to the RX100.

Looking at size and weight, the portability grade of the 645D and RX100 is 50 and 91 respectively.

Usually, it's difficult to envision the contrast between sensor measurements only by reading specs. The photograph here may offer you a much better sense of the sensor sizes in the 645D and RX100.

As you can plainly see, both of the cameras have got different megapixel count and different sensor measurements. The 645D due to its larger sensor will make achieving bokeh easier and the Pentax 645D will offer greater detail due to its extra 20MP. Greater resolution will allow you to crop pics much more aggressively. The older 645D is going to be behind when it comes to sensor tech.