Panasonic GH3 vs Pentax 645D

Following is a thorough review of the Panasonic GH3 versus Pentax 645D, one is a Advanced Mirrorless and the other is a Pro DSLR by brands Panasonic and Pentax. There is a significant difference among the image resolutions of the GH3 (16MP) and 645D (40MP) and the GH3 (Four Thirds) and 645D (Medium format) use totally different sensor measurements.

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The GH3 was released 2 years after the 645D which is a fairly sizable gap as far as camera tech is concerned. Each of these cameras offer different body type with the Panasonic GH3 being a SLR-style mirrorless camera and the Pentax 645D being a Large SLR camera.

Before getting straight into a complete comparison, below is a short highlight of how the GH3 matches up versus the 645D in relation to portability, imaging, features and an overall score.

The following is a sample of the gallery pictures for Panasonic Lumix DMC-GH3 and Pentax 645D. The complete galleries are provided at Panasonic GH3 Gallery and Pentax 645D Gallery.

For anyone who is planning to carry around your camera frequently, you will need to think about its weight and measurements. The Panasonic GH3 provides outer dimensions of 133mm x 93mm x 82mm (5.2" x 3.7" x 3.2") and a weight of 550 grams (1.21 lbs) and the Pentax 645D has proportions of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") accompanied by a weight of 1480 grams (3.26 lbs).

Contrast the Panasonic GH3 versus Pentax 645D in the latest Camera and Lens Size Comparison Tool.

Don't forget, the weight of an Interchangeable Lens Camera will vary based on the lens you have chosen during that time. Following is the front view measurements comparison of the GH3 versus the 645D.

Looking at size and weight, the portability grade of the GH3 and 645D is 66 and 50 respectively.

Generally, it is hard to envision the gap in sensor sizes merely by researching specs. The pic underneath might offer you a stronger sense of the sensor dimensions in the GH3 and 645D.

As you can plainly see, both the cameras offer different megapixel count and different sensor sizes. The GH3 due to its smaller sensor will make shooting shallow DOF trickier and the Pentax 645D will result in extra detail as a result of its extra 24 Megapixels. Greater resolution will also enable you to crop images a little more aggressively. The newer GH3 is going to have an edge in sensor tech.