Panasonic G1 vs Pentax 645D

Following is a comprehensive comparison of the Panasonic G1 and Pentax 645D, former is a Entry-Level Mirrorless while the other is a Pro DSLR by brands Panasonic and Pentax. There is a noticeable difference among the sensor resolutions of the G1 (12MP) and 645D (40MP) and the G1 (Four Thirds) and 645D (Medium format) provide different sensor size.

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The G1 was unveiled 13 months prior to the 645D making them a generation away from each other. Both the cameras have different body design with the Panasonic G1 being a SLR-style mirrorless camera and the Pentax 645D being a Large SLR camera.

Before diving straight to a detailed comparison, here is a quick overview of how the G1 grades versus the 645D when it comes to portability, imaging, features and an overall score.

Following is a sample of the gallery pics for Panasonic Lumix DMC-G1 & Pentax 645D. The full galleries are viewable at Panasonic G1 Gallery & Pentax 645D Gallery.

When you are going to carry around your camera often, you'll need to factor in its weight and volume. The Panasonic G1 has got outside measurements of 124mm x 84mm x 45mm (4.9" x 3.3" x 1.8") and a weight of 360 grams (0.79 lbs) while the Pentax 645D has sizing of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") accompanied by a weight of 1480 grams (3.26 lbs).

Take a look at the Panasonic G1 and Pentax 645D in our completely new Camera & Lens Size Comparison Tool.

Bear in mind, the weight of an ILC will differ dependant on the lens you are employing at the time. Here is a front view dimension comparison of the G1 against the 645D.

Using size and weight, the portability rating of the G1 and 645D is 82 and 50 respectively.

In many cases, it is very difficult to imagine the difference in sensor sizes merely by seeing specs. The pic underneath should provide you a much better sense of the sensor sizing in the G1 and 645D.

All in all, both the cameras provide different resolutions and different sensor sizes. The G1 using its smaller sensor is going to make achieving bokeh more challenging and the Pentax 645D will produce greater detail having an extra 28MP. Greater resolution will also help you crop photos more aggressively. The more aged G1 will be behind when it comes to sensor technology.