Olympus TG-3 vs Pentax 645Z

Lets take a deeper look at the Olympus TG-3 vs Pentax 645Z, former being a Waterproof while the other is a Pro DSLR by companies Olympus and Pentax. There exists a substantial gap between the resolutions of the TG-3 (16MP) and 645Z (51MP) and the TG-3 (1/2.3") and 645Z (Medium format) offer totally different sensor measurements.

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The TG-3 was brought out at a similar time to the 645Z so they are both of a similar age. The two cameras have different body design with the Olympus TG-3 being a Compact camera and the Pentax 645Z being a Large SLR camera.

Before delving straight to a step-by-step comparison, here is a quick summary of how the TG-3 scores vs the 645Z when considering portability, imaging, features and an overall grade.

Below is a sample of the gallery pictures for Olympus Tough TG-3 & Pentax 645Z. The entire galleries are viewable at Olympus TG-3 Gallery & Pentax 645Z Gallery.

For anyone who is going to lug around your camera often, you are going to need to factor in its weight and size. The Olympus TG-3 comes with outside measurements of 112mm x 66mm x 31mm (4.4" x 2.6" x 1.2") and a weight of 247 grams (0.54 lbs) whilst the Pentax 645Z has specifications of 156mm x 117mm x 123mm (6.1" x 4.6" x 4.8") having a weight of 1550 grams (3.42 lbs).

See the Olympus TG-3 vs Pentax 645Z in our brand new Camera plus Lens Size Comparison Tool.

Remember that, the weight of an ILC will differ based on the lens you are utilizing at that moment. Here is a front view size comparison of the TG-3 against the 645Z.

Taking into account dimensions and weight, the portability grade of the TG-3 and 645Z is 90 and 49 respectively.

Normally, it's tough to envision the difference between sensor measurements purely by looking at specifications. The photograph below will offer you a more clear sense of the sensor sizing in the TG-3 and 645Z.

Plainly, the two cameras have different megapixels and different sensor measurements. The TG-3 because of its tinier sensor will make shooting shallower DOF trickier and the Pentax 645Z will give you greater detail having its extra 35MP. Greater resolution will also enable you to crop images a bit more aggressively.