Olympus TG-320 vs Pentax 645D

On this page, we are analyzing the Olympus TG-320 and Pentax 645D, former being a Waterproof while the other is a Pro DSLR by companies Olympus and Pentax. There is a considerable difference between the sensor resolutions of the TG-320 (14MP) and 645D (40MP) and the TG-320 (1/2.3") and 645D (Medium format) boast different sensor sizing.

Samsung Releases Faster Versions of EVO MicroSD Cards

The TG-320 was unveiled 23 months later than the 645D making them a generation apart from each other. Both of the cameras have different body design with the Olympus TG-320 being a Compact camera and the Pentax 645D being a Large SLR camera.

Before we go into a detailed comparison, here is a short overview of how the TG-320 scores versus the 645D with respect to portability, imaging, features and an overall grade.

This is a sample of the gallery pictures for Olympus TG-320 & Pentax 645D. The full galleries are provided at Olympus TG-320 Gallery & Pentax 645D Gallery.

When you are aiming to lug around your camera regularly, you'll have to factor its weight and volume. The Olympus TG-320 enjoys physical dimensions of 96mm x 63mm x 23mm (3.8" x 2.5" x 0.9") and a weight of 155 grams (0.34 lbs) while the Pentax 645D has sizing of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") with a weight of 1480 grams (3.26 lbs).

Look at the Olympus TG-320 and Pentax 645D in our completely new Camera plus Lens Size Comparison Tool.

Keep in mind, the weight of an ILC will differ depending on the lens you have attached at that time. Following is a front view physical size comparison of the TG-320 compared to the 645D.

Taking into account size and weight, the portability score of the TG-320 and 645D is 94 and 50 respectively.

Oftentimes, it is difficult to visualize the gap between sensor measurements simply by checking specs. The photograph below might give you a more clear sense of the sensor sizes in the TG-320 and 645D.

As you can plainly see, each of the cameras have different megapixels and different sensor measurements. The TG-320 with its tinier sensor is going to make achieving shallower DOF harder and the Pentax 645D will give you greater detail having an extra 26MP. Greater resolution will enable you to crop images a bit more aggressively. The fresher TG-320 should have an edge in sensor tech.