Panasonic G3 vs Sony A7S

In this article, we will be comparing the Panasonic G3 and Sony A7S, former being a Entry-Level Mirrorless while the latter is a Pro Mirrorless by competitors Panasonic and Sony. There is a large difference among the sensor resolutions of the G3 (16MP) and A7S (12MP) and the G3 (Four Thirds) and A7S (Full frame) enjoy totally different sensor size.

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The G3 was brought out 3 years prior to the A7S and that is a fairly serious difference as far as camera tech is concerned. Both the cameras offer the identical body type (SLR-style mirrorless).

Before we go in to a more detailed comparison, below is a short view of how the G3 matches up against the A7S with regard to portability, imaging, features and an overall rating.

This is a preview of the gallery photos for Panasonic Lumix DMC-G3 & Sony Alpha A7S. The entire galleries are available at Panasonic G3 Gallery & Sony A7S Gallery.

When you are aiming to carry your camera, you're going to have to take into account its weight and volume. The Panasonic G3 enjoys physical measurements of 115mm x 84mm x 47mm (4.5" x 3.3" x 1.9") having a weight of 336 grams (0.74 lbs) while the Sony A7S has sizing of 127mm x 94mm x 48mm (5.0" x 3.7" x 1.9") along with a weight of 489 grams (1.08 lbs).

Take a look at the Panasonic G3 and Sony A7S in our completely new Camera plus Lens Size Comparison Tool.

Do not forget, the weight of an ILC will differ dependant on the lens you select at the time. Below is the front view measurements comparison of the G3 versus the A7S.

Considering size and weight, the portability grade of the G3 and A7S is 83 and 77 respectively.

Generally, its hard to visualise the gap in sensor sizing simply by looking through technical specs. The graphic below should offer you a more clear sense of the sensor measurements in the G3 and A7S.

As you have seen, both the cameras offer different megapixel count and different sensor sizing. The G3 because of its smaller sensor will make shooting shallow DOF harder and the Panasonic G3 will render greater detail having its extra 4MP. Higher resolution can also allow you to crop shots a little more aggressively. The older G3 will be behind with regard to sensor tech.