Olympus TG-4 vs Pentax 645D

Lets take a deeper look at the Olympus TG-4 versus Pentax 645D, one being a Waterproof and the other is a Pro DSLR by brands Olympus and Pentax. There is a huge difference among the resolutions of the TG-4 (16MP) and 645D (40MP) and the TG-4 (1/2.3") and 645D (Medium format) boast totally different sensor sizes.

Photography Glossary

The TG-4 was released 5 years later than the 645D and that is a fairly significant gap as far as camera tech is concerned. Each of these cameras have different body design with the Olympus TG-4 being a Compact camera and the Pentax 645D being a Large SLR camera.

Before going straight to a in depth comparison, here is a simple overview of how the TG-4 grades against the 645D in terms of portability, imaging, features and an overall rating.

Below is a sample of the gallery pictures for Olympus Tough TG-4 and Pentax 645D. The complete galleries are available at Olympus TG-4 Gallery and Pentax 645D Gallery.

In case you're planning to carry your camera often, you should take into account its weight and volume. The Olympus TG-4 enjoys exterior measurements of 112mm x 66mm x 31mm (4.4" x 2.6" x 1.2") and a weight of 247 grams (0.54 lbs) and the Pentax 645D has sizing of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") along with a weight of 1480 grams (3.26 lbs).

Examine the Olympus TG-4 versus Pentax 645D in the latest Camera with Lens Size Comparison Tool.

Bear in mind, the weight of an Interchangeable Lens Camera will vary dependant on the lens you are employing during that time. Underneath is a front view over all size comparison of the TG-4 compared to the 645D.

Looking at size and weight, the portability rating of the TG-4 and 645D is 90 and 50 respectively.

Generally, it's hard to visualise the difference in sensor sizing merely by researching specs. The graphic below will help provide you a more clear sense of the sensor sizing in the TG-4 and 645D.

All in all, both of the cameras have different resolutions and different sensor sizing. The TG-4 featuring a smaller sensor will make shooting shallow DOF tougher and the Pentax 645D will provide you with extra detail as a result of its extra 24MP. Greater resolution will let you crop images a bit more aggressively. The more modern TG-4 is going to have an edge with regard to sensor technology.