Panasonic G9 vs Sony A55

Here, we will be matching up the Panasonic G9 versus Sony A55, one being a Pro Mirrorless and the latter is a Entry-Level DSLR by competitors Panasonic and Sony. There is a significant difference among the resolutions of the G9 (20MP) and A55 (16MP) and the G9 (Four Thirds) and A55 (APS-C) boast different sensor measurements.

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The G9 was brought out 7 years later than the A55 and that is a fairly sizable gap as far as camera tech is concerned. The two cameras feature different body design with the Panasonic G9 being a SLR-style mirrorless camera and the Sony A55 being a Compact SLR camera.

Before going straight to a in-depth comparison, here is a quick highlight of how the G9 grades vs the A55 in the way of portability, imaging, features and an overall rating.

The following is a preview of the gallery images for Panasonic Lumix DC-G9 and Sony SLT-A55. The entire galleries are provided at Panasonic G9 Gallery and Sony A55 Gallery.

In case you're planning to carry your camera often, you are going to need to think about its weight and volume. The Panasonic G9 has exterior dimensions of 137mm x 97mm x 92mm (5.4" x 3.8" x 3.6") with a weight of 658 grams (1.45 lbs) while the Sony A55 has sizing of 124mm x 92mm x 85mm (4.9" x 3.6" x 3.3") and a weight of 500 grams (1.10 lbs).

See the Panasonic G9 versus Sony A55 in the all new Camera and Lens Size Comparison Tool.

Bear in mind, the weight of an Interchangeable Lens Camera will vary dependant on the lens you choose at the time. Following is a front view dimensions comparison of the G9 compared to the A55.

Using size and weight, the portability score of the G9 and A55 is 62 and 67 respectively.

In many cases, it's tough to picture the gap in sensor sizing purely by checking out technical specs. The graphic underneath should provide you a greater sense of the sensor sizes in the G9 and A55.

As you have seen, each of these cameras feature different resolutions and different sensor sizing. The G9 due to its smaller sensor is going to make achieving shallow depth of field harder and the Panasonic G9 will produce greater detail having its extra 4 Megapixels. Higher resolution will also help you crop pictures way more aggressively. The newer G9 should have an edge when it comes to sensor tech.