Olympus TG-3 vs Pentax 645D

Here is a extended overview of the Olympus TG-3 vs Pentax 645D, one being a Waterproof and the other is a Pro DSLR by brands Olympus and Pentax. There is a big difference among the resolutions of the TG-3 (16MP) and 645D (40MP) and the TG-3 (1/2.3") and 645D (Medium format) have totally different sensor size.

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The TG-3 was released 4 years later than the 645D and that is a fairly big gap as far as camera tech is concerned. Both cameras have different body design with the Olympus TG-3 being a Compact camera and the Pentax 645D being a Large SLR camera.

Before getting straight to a thorough comparison, here is a concise view of how the TG-3 matches up vs the 645D for portability, imaging, features and an overall rating.

Here is a sample of the gallery pics for Olympus Tough TG-3 and Pentax 645D. The complete galleries are available at Olympus TG-3 Gallery and Pentax 645D Gallery.

In case you're going to carry your camera often, you will want to factor its weight and measurements. The Olympus TG-3 enjoys external dimensions 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 645D has proportions of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") along with a weight of 1480 grams (3.26 lbs).

Check the Olympus TG-3 vs Pentax 645D in the latest Camera with Lens Size Comparison Tool.

Bear in mind, the weight of an Interchangeable Lens Camera will differ dependant on the lens you have at the time. Underneath is a front view measurements comparison of the TG-3 and the 645D.

Taking into consideration size and weight, the portability rating of the TG-3 and 645D is 90 and 50 respectively.

Oftentimes, its hard to visualise the gap in sensor sizing merely by checking out a spec sheet. The visual underneath might give you a much better sense of the sensor dimensions in the TG-3 and 645D.

Clearly, both cameras have different resolutions and different sensor sizing. The TG-3 featuring a smaller sensor will make getting shallow DOF tougher and the Pentax 645D will provide more detail as a result of its extra 24 Megapixels. Greater resolution can also make it easier to crop photos a bit more aggressively. The younger TG-3 will have a benefit when it comes to sensor technology.