Pentax 645D vs Pentax WG-2 GPS

Let's look much closer at the Pentax 645D and Pentax WG-2 GPS, one is a Pro DSLR and the latter is a Waterproof and both are manufactured by Pentax. There is a significant difference among the resolutions of the 645D (40MP) and WG-2 GPS (16MP) and the 645D (Medium format) and WG-2 GPS (1/2.3") provide different sensor measurements.

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The 645D was introduced 23 months before the WG-2 GPS which makes them a generation away from each other. Both cameras have different body design with the Pentax 645D being a Large SLR camera and the Pentax WG-2 GPS being a Compact camera.

Before diving straight to a comprehensive comparison, here is a concise introduction of how the 645D scores against the WG-2 GPS with regard to portability, imaging, features and an overall score.

This is a preview of the gallery images for Pentax 645D and Pentax Optio WG-2 GPS. The whole galleries are viewable at Pentax 645D Gallery and Pentax WG-2 GPS Gallery.

When you are planning to carry around your camera frequently, you'll need to take into account its weight and proportions. The Pentax 645D offers physical dimensions of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") and a weight of 1480 grams (3.26 lbs) while the Pentax WG-2 GPS has measurements of 122mm x 61mm x 30mm (4.8" x 2.4" x 1.2") and a weight of 198 grams (0.44 lbs).

Compare the Pentax 645D and Pentax WG-2 GPS in the latest Camera with Lens Size Comparison Tool.

Take into account, the weight of an Interchangeable Lens Camera will vary depending on the lens you are employing at that moment. Below is a front view measurement comparison of the 645D vs the WG-2 GPS.

Looking at size and weight, the portability rating of the 645D and WG-2 GPS is 50 and 91 respectively.

Usually, it is hard to picture the gap in sensor sizes only by checking out technical specs. The picture below will offer you a better sense of the sensor dimensions in the 645D and WG-2 GPS.

As you can tell, both cameras have different resolutions and different sensor sizes. The 645D having a bigger sensor is going to make getting shallower DOF less difficult and the Pentax 645D will show more detail using its extra 24 Megapixels. Higher resolution will let you crop pictures a bit more aggressively. The more aged 645D will be disadvantaged when it comes to sensor innovation.