Size and weight are big decision factors when you are trying to find the ideal camera for your needs.
In this section, we are going to illustrate the Casio EX-H20G and Olympus E-P5 side-by-side from the front, back and top in their relative dimensions. Casio EX-H20G has external dimensions of 103 x 68 x 29 mm (4.06 x 2.68 x 1.14″) and weighs 216 g (0.48 lb / 7.62 oz) (including batteries). Olympus E-P5 has external dimensions of 122 x 69 x 37 mm (4.8 x 2.72 x 1.46″) and weighs 420 g (0.93 lb / 14.82 oz) (including batteries).
Below you can see the front-view size comparison of the Casio EX-H20G and the Olympus E-P5. Casio EX-H20G is clearly the smaller of the two cameras. Its body is 19mm narrower, 1mm shorter and 8mm thinner than Olympus E-P5. As you can tell, actually this is not a fair size comparison since Casio EX-H20G has a built-in lens but Olympus E-P5 doesn't. Once you put a lens on E-P5, its thickness will increase significantly.
Here is the back view size comparison of the Casio EX-H20G and Olympus E-P5.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Casio EX-H20G is significantly lighter (204g ) than the Olympus E-P5 which may become a big advantage especially on long walking trips.
Again, this comparison may not be very useful in real life as we are comparing the weight of a camera with a built-in lens to the body-only weight of an interchangeable lens camera. Once you put a lens on E-P5, the total kit will weigh much higher.
Weather Sealing
Unfortunately neither the Casio Exilim EX-H20G nor Olympus PEN E-P5 provides any type of weather sealing in their bodies, so you have to give extra care especially when you are shooting outdoors. If weather sealing is a must-have feature for you, check these sections: Top Compact Cameras with Weather Sealing Top Mirrorless Cameras with Weather Sealing
LCD Screen Size and Features
Casio EX-H20G and Olympus E-P5's LCD screens have the same diagonal size of 3.00 inches.
On the other hand, Olympus E-P5 features a
Tilting screen where you can change the angle of the screen to make it easier to shoot from waist or over-the-head levels whereas the Casio EX-H20G has a fixed type screen which provides less flexibility in shooting positions compared to E-P5.