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 III and Panasonic F5 side-by-side from the front, back and top in their relative dimensions. Olympus E-M10 III has external dimensions of 122 x 84 x 50 mm (4.8 x 3.31 x 1.97″) and weighs 410 g (0.90 lb / 14.46 oz) (including batteries). Panasonic F5 has external dimensions of 97 x 58 x 22 mm (3.82 x 2.28 x 0.87″) and weighs 121 g (0.27 lb / 4.27 oz) (including batteries).
Below you can see the front-view size comparison of the Olympus E-M10 III and the Panasonic F5. Panasonic F5 is clearly the smaller of the two cameras. Its body is 25mm narrower, 26mm shorter and 28mm thinner than Olympus E-M10 III. As you can tell, actually this is not a fair size comparison since Panasonic F5 has a built-in lens but Olympus E-M10 III doesn't. Once you put a lens on E-M10 III, its thickness will increase significantly.
Now lets look at the top view comparison of Olympus E-M10 III and Panasonic F5.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Panasonic F5 is significantly lighter (289g ) than the Olympus E-M10 III 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-M10 III, the total kit will weigh much higher.
Weather Sealing
Unfortunately neither the Olympus OM-D E-M10 Mark III nor Panasonic Lumix DMC-F5 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 Top Compact Cameras with Weather Sealing
LCD Screen Size and Features
Olympus E-M10 III's 3.00" LCD screen is slightly larger than Panasonic F5's 2.7" screen.
In addition to the size advantage, Olympus E-M10 III 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, Panasonic F5 has a fixed type screen which provides less flexibility in shooting positions compared to E-M10 III.