Panasonic G3 vs Pentax K-S1

On this page, we will be contrasting the Panasonic G3 vs Pentax K-S1, one being a Entry-Level Mirrorless and the latter is a Advanced DSLR by companies Panasonic and Pentax. The sensor resolution of the G3 (16MP) and the K-S1 (20MP) is pretty well matched but the G3 (Four Thirds) and K-S1 (APS-C) provide totally different sensor size.

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The G3 was brought out 4 years earlier than the K-S1 and that is quite a big gap as far as technology is concerned. Both of the cameras have different body design with the Panasonic G3 being a SLR-style mirrorless camera and the Pentax K-S1 being a Mid-size SLR camera.

Before getting right into a comprehensive comparison, here is a short summary of how the G3 scores vs the K-S1 with respect to portability, imaging, features and an overall grade.

Here is a preview of the gallery images for Panasonic Lumix DMC-G3 and Pentax K-S1. The entire galleries are provided at Panasonic G3 Gallery and Pentax K-S1 Gallery.

If you're planning to lug around your camera regularly, you need to think about its weight and measurements. The Panasonic G3 comes with external measurements of 115mm x 84mm x 47mm (4.5" x 3.3" x 1.9") and a weight of 336 grams (0.74 lbs) and the Pentax K-S1 has proportions of 121mm x 93mm x 70mm (4.8" x 3.7" x 2.8") along with a weight of 558 grams (1.23 lbs).

Analyze the Panasonic G3 vs Pentax K-S1 in the all new Camera with Lens Size Comparison Tool.

Remember, the weight of an Interchangeable Lens Camera will change depending on the lens you have during that time. The following is a front view scale comparison of the G3 and the K-S1.

Using dimensions and weight, the portability score of the G3 and K-S1 is 83 and 69 respectively.

Sometimes, it is difficult to envision the contrast between sensor measurements merely by checking specs. The photograph underneath will provide you a more clear sense of the sensor sizing in the G3 and K-S1.

All in all, the 2 cameras provide different megapixels and different sensor measurements. The G3 due to its tinier sensor will make getting shallow DOF more challenging and the Pentax K-S1 will resolve extra detail having its extra 4 Megapixels. Higher resolution will also help you crop shots more aggressively. The older G3 is going to be disadvantaged in sensor technology.