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 Olympus E-PL8 and Pentax Q-S1 side-by-side from the front, back and top in their relative dimensions. Olympus E-PL8 has external dimensions of 115 x 67 x 38 mm (4.53 x 2.64 x 1.5″) and weighs 357 g (0.79 lb / 12.59 oz) (including batteries). Pentax Q-S1 has external dimensions of 105 x 58 x 34 mm (4.13 x 2.28 x 1.34″) and weighs 203 g (0.45 lb / 7.16 oz) (including batteries).
Below you can see the front-view size comparison of the Olympus E-PL8 and the Pentax Q-S1. Pentax Q-S1 is clearly the smaller of the two cameras. Its body is 10mm narrower, 9mm shorter and 4mm thinner than Olympus E-PL8.
Comparison image of the Olympus E-PL8 and the Pentax Q-S1 Size, Weight and External Dimensions - Front View
Here is the back view size comparison of the Olympus E-PL8 and Pentax Q-S1.
Comparison image of the Olympus E-PL8 and the Pentax Q-S1 Size and Weight - Back View
Now lets look at the top view comparison of Olympus E-PL8 and Pentax Q-S1.
Top View Comparison image of the Olympus E-PL8 and the the Pentax Q-S1 Size
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Pentax Q-S1 is significantly lighter (154g ) than the Olympus E-PL8 which may become a big advantage especially on long walking trips.
Also keep in mind that body weight is not the only deciding factor when comparing two interchangeable camera bodies, you also have to take into account the lenses that you will be using with these bodies.
Weather Sealing
Unfortunately neither the Olympus PEN E-PL8 nor Pentax Q-S1 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 Mirrorless Cameras with Weather Sealing
LCD Screen Size and Features
Olympus E-PL8 and Pentax Q-S1's LCD screens have the same diagonal size of 3.00 inches.
On the other hand, Olympus E-PL8 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 Pentax Q-S1 has a fixed type screen which provides less flexibility in shooting positions compared to E-PL8.