Pentax 645D vs YI M1

Here is a detailed comparison of the Pentax 645D vs YI M1, one being a Pro DSLR and the latter is a Entry-Level Mirrorless by manufacturers Pentax and YI. There exists a crucial gap between the sensor resolutions of the 645D (40MP) and M1 (20MP) and the 645D (Medium format) and M1 (Four Thirds) posses different sensor size.

Photography Glossary

The 645D was unveiled 7 years earlier than the M1 and that is quite a serious gap as far as technology is concerned. Both the cameras have different body design with the Pentax 645D being a Large SLR camera and the YI M1 being a Rangefinder-style mirrorless camera.

Before going into a more detailed comparison, here is a concise introduction of how the 645D scores vs the M1 in regards to portability, imaging, features and an overall rating.

Following is a preview of the gallery images for Pentax 645D and YI M1. The full galleries are available at Pentax 645D Gallery and YI M1 Gallery.

In case you're aiming to carry your camera often, you will want to take into account its weight and proportions. The Pentax 645D features external dimensions of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") and a weight of 1480 grams (3.26 lbs) and the YI M1 has measurements of 114mm x 64mm x 34mm (4.5" x 2.5" x 1.3") with a weight of 350 grams (0.77 lbs).

Take a look at the Pentax 645D vs YI M1 in the latest Camera with Lens Size Comparison Tool.

Always remember, the weight of an Interchangeable Lens Camera will vary based on the lens you select at that time. Underneath is a front view physical size comparison of the 645D against the M1.

Using dimensions and weight, the portability grade of the 645D and M1 is 50 and 87 respectively.

Quite often, it is very difficult to imagine the gap between sensor sizing simply by reading specifications. The visual below should give you a more clear sense of the sensor sizes in the 645D and M1.

To sum up, both cameras have different megapixels and different sensor sizing. The 645D with its bigger sensor is going to make getting shallower DOF easier and the Pentax 645D will deliver more detail having an extra 20 Megapixels. Higher resolution can also enable you to crop pictures a bit more aggressively. The older 645D is going to be disadvantaged with regard to sensor tech.