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 Pentax K-01 and Olympus E-M1X side-by-side from the front, back and top in their relative dimensions. Pentax K-01 has external dimensions of 122 x 79 x 58 mm (4.8 x 3.11 x 2.28″) and weighs 561 g (1.24 lb / 19.79 oz) (including batteries). Olympus E-M1X has external dimensions of 144 x 147 x 75 mm (5.67 x 5.79 x 2.95″) and weighs 997 g (2.20 lb / 35.17 oz) (including batteries).
Below you can see the front-view size comparison of the Pentax K-01 and the Olympus E-M1X. Pentax K-01 is clearly the smaller of the two cameras. Its body is 22mm narrower, 68mm shorter and 17mm thinner than Olympus E-M1X.
Now lets look at the top view comparison of Pentax K-01 and Olympus E-M1X.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Pentax K-01 is significantly lighter (436g ) than the Olympus E-M1X 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. Since Pentax K-01 has an APS-C sized sensor and Olympus E-M1X has a smaller Four Thirds sensor, Olympus E-M1X's lenses for a similar focal length and aperture will generally be lighter and smaller than the Pentax K-01 lenses.
Weather Sealing
Thanks to the weather-sealed body of the E-M1X, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to the K-01.
LCD Screen Size and Features
Pentax K-01 and Olympus E-M1X's LCD screens have the same diagonal size of 3.00 inches.
On the other hand, Olympus E-M1X sports a
Fully Articulated screen which you can change the angle and position of the screen almost freely, making it possible to shoot from waist or over-the-head levels, and especially very useful for shooting selfies and video. Pentax K-01's LCD screen is a fixed type which provides almost no flexibility in shooting positions compared to E-M1X.