Olympus TG-820 iHS vs Pentax 645Z

On this page, we are contrasting the Olympus TG-820 iHS and Pentax 645Z, one is a Waterproof and the other is a Pro DSLR by rivals Olympus and Pentax. There is a crucial difference between the image resolutions of the TG-820 iHS (12MP) and 645Z (51MP) and the TG-820 iHS (1/2.3") and 645Z (Medium format) have totally different sensor dimensions.

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The TG-820 iHS was introduced 3 years prior to the 645Z which is quite a serious gap as far as tech is concerned. Both cameras have different body design with the Olympus TG-820 iHS being a Compact camera and the Pentax 645Z being a Large SLR camera.

Before we go right into a thorough comparison, here is a short summation of how the TG-820 iHS scores against the 645Z in the way of portability, imaging, features and an overall mark.

Below is a sample of the gallery pics for Olympus TG-820 iHS and Pentax 645Z. The whole galleries are available at Olympus TG-820 iHS Gallery and Pentax 645Z Gallery.

For those who are aiming to travel with your camera, you are going to need to take into account its weight and proportions. The Olympus TG-820 iHS features outside dimensions of 101mm x 65mm x 26mm (4.0" x 2.6" x 1.0") and a weight of 206 grams (0.45 lbs) and the Pentax 645Z has measurements of 156mm x 117mm x 123mm (6.1" x 4.6" x 4.8") along with a weight of 1550 grams (3.42 lbs).

Check out the Olympus TG-820 iHS and Pentax 645Z in the latest Camera and Lens Size Comparison Tool.

Bear in mind, the weight of an Interchangeable Lens Camera will differ depending on the lens you are employing at that moment. Here is a front view measurement comparison of the TG-820 iHS vs the 645Z.

Taking into consideration size and weight, the portability score of the TG-820 iHS and 645Z is 92 and 49 respectively.

Usually, it is very hard to see the gap between sensor dimensions just by reviewing a spec sheet. The picture below may provide you a greater sense of the sensor dimensions in the TG-820 iHS and 645Z.

As you can see, both of the cameras have different resolutions and different sensor dimensions. The TG-820 iHS with its tinier sensor will make shooting shallower DOF harder and the Pentax 645Z will offer you greater detail using its extra 39 Megapixels. Greater resolution will also make it easier to crop pics a bit more aggressively. The more aged TG-820 iHS is going to be disadvantaged with regard to sensor innovation.