Pentax WG-3 GPS vs Sigma SD15

Following is a extended review of the Pentax WG-3 GPS vs Sigma SD15, former is a Waterproof while the other is a Advanced DSLR by manufacturers Pentax and Sigma. There exists a considerable gap among the image resolutions of the WG-3 GPS (16MP) and SD15 (5MP) and the WG-3 GPS (1/2.3") and SD15 (APS-C) offer totally different sensor dimensions.

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The WG-3 GPS was launched 3 years after the SD15 which is a fairly large difference as far as camera technology is concerned. Each of these cameras feature different body design with the Pentax WG-3 GPS being a Compact camera and the Sigma SD15 being a Mid-size SLR camera.

Before diving right into a full comparison, here is a concise overview of how the WG-3 GPS scores versus the SD15 with respect to portability, imaging, features and an overall score.

This is a sample of the gallery pictures for Pentax WG-3 GPS & Sigma SD15. The complete galleries are available at Pentax WG-3 GPS Gallery & Sigma SD15 Gallery.

For anyone who is looking to carry around your camera regularly, you will have to take into account its weight and proportions. The Pentax WG-3 GPS has got external measurements of 125mm x 64mm x 33mm (4.9" x 2.5" x 1.3") and a weight of 238 grams (0.52 lbs) whilst the Sigma SD15 has measurements of 144mm x 107mm x 81mm (5.7" x 4.2" x 3.2") accompanied by a weight of 750 grams (1.65 lbs).

Analyze the Pentax WG-3 GPS vs Sigma SD15 in our newest Camera plus Lens Size Comparison Tool.

Don't forget, the weight of an ILC will change depending on the lens you are using at that time. The following is a front view physical size comparison of the WG-3 GPS and the SD15.

Taking into consideration dimensions and weight, the portability grade of the WG-3 GPS and SD15 is 90 and 59 respectively.

More often than not, it can be tough to visualise the gap in sensor sizes only by looking through specs. The image below should provide you a much better sense of the sensor sizing in the WG-3 GPS and SD15.

As you can plainly see, both of those cameras feature different megapixel count and different sensor sizes. The WG-3 GPS due to its smaller sensor will make getting shallow DOF harder and the Pentax WG-3 GPS will result in greater detail utilizing its extra 11 Megapixels. Greater resolution will also make it easier to crop photos way more aggressively. The newer WG-3 GPS will have a benefit with regard to sensor innovation.