Pentax Q-S1 vs Sigma SD15

Here, we will be comparing the Pentax Q-S1 versus Sigma SD15, one is a Entry-Level Mirrorless and the latter is a Advanced DSLR by companies Pentax and Sigma. There exists a huge gap between the sensor resolutions of the Q-S1 (12MP) and SD15 (5MP) and the Q-S1 (1/1.7") and SD15 (APS-C) have totally different sensor dimensions.

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The Q-S1 was brought out 4 years after the SD15 which is quite a significant gap as far as technology is concerned. Each of these cameras feature different body design with the Pentax Q-S1 being a Rangefinder-style mirrorless camera and the Sigma SD15 being a Mid-size SLR camera.

Before getting straight to a step-by-step comparison, here is a concise summation of how the Q-S1 scores vs the SD15 for portability, imaging, features and an overall mark.

Here is a preview of the gallery photos for Pentax Q-S1 and Sigma SD15. The entire galleries are viewable at Pentax Q-S1 Gallery and Sigma SD15 Gallery.

In case you're going to travel with your camera regularly, you're going to have to consider its weight and size. The Pentax Q-S1 has got physical dimensions of 105mm x 58mm x 34mm (4.1" x 2.3" x 1.3") having a weight of 203 grams (0.45 lbs) and the Sigma SD15 has specifications of 144mm x 107mm x 81mm (5.7" x 4.2" x 3.2") having a weight of 750 grams (1.65 lbs).

See the Pentax Q-S1 versus Sigma SD15 in the new Camera and Lens Size Comparison Tool.

Don't forget, the weight of an Interchangeable Lens Camera will differ based on the lens you choose at the time. The following is a front view proportions comparison of the Q-S1 versus the SD15.

Using dimensions and weight, the portability grade of the Q-S1 and SD15 is 92 and 59 respectively.

Quite often, its difficult to visualise the difference between sensor dimensions purely by reading through a spec sheet. The picture here will help give you a much better sense of the sensor sizes in the Q-S1 and SD15.

Clearly, each of the cameras come with different resolutions and different sensor dimensions. The Q-S1 due to its tinier sensor will make getting shallower depth of field harder and the Pentax Q-S1 will give you extra detail having its extra 7 Megapixels. Higher resolution will also make it easier to crop photographs a good deal more aggressively. The fresher Q-S1 is going to have an advantage in sensor tech.