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-M10 II and Leica M-Monochrom side-by-side from the front, back and top in their relative dimensions. Olympus E-M10 II has external dimensions of 120 x 83 x 47 mm (4.72 x 3.27 x 1.85″) and weighs 390 g (0.86 lb / 13.76 oz) (including batteries). Leica M-Monochrom has external dimensions of 139 x 80 x 37 mm (5.47 x 3.15 x 1.46″) and weighs 600 g (1.32 lb / 21.16 oz) (including batteries).
Below you can see the front-view size comparison of the Olympus E-M10 II and the Leica M-Monochrom. Leica M-Monochrom is 3mm shorter and 10mm thinner than Olympus E-M10 II but it is also 19mm wider.
Here is the back view size comparison of the Olympus E-M10 II and Leica M-Monochrom.
Now lets look at the top view comparison of Olympus E-M10 II and Leica M-Monochrom.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Olympus E-M10 II is significantly lighter (210g ) than the Leica M-Monochrom 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 Leica M-Monochrom has a Full frame sensor and Olympus E-M10 II has a smaller Four Thirds sensor, Olympus E-M10 II's lenses for a similar focal length and aperture will generally be lighter and smaller than the Leica M-Monochrom lenses.
Weather Sealing
Unfortunately neither the Olympus OM-D E-M10 II nor Leica M-Monochrom 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-M10 II's 3.00" LCD screen is slightly larger than Leica M-Monochrom's 2.5 screen.
In addition to the size advantage, Olympus E-M10 II LCD screen also has a
Tilting feature where you can change the angle of the screen to make it easier to shoot from waist or over-the-head levels. On the other hand, Leica M-Monochrom has a fixed type screen which provides less flexibility in shooting positions compared to E-M10 II.