Size and weight is a big decision factor when you are trying to find the ideal camera for your needs.
In this section, We are going to illustrate Sony A6100 and Olympus PEN-F side-by-side from the front, back and top in their relative dimensions. Sony A6100 has external dimensions of 120 x 67 x 59 mm (4.72 x 2.64 x 2.32″) and weighs 396 g (0.87 lb / 13.97 oz) (including batteries). Olympus PEN-F has external dimensions of 125 x 72 x 37 mm (4.92 x 2.83 x 1.46″) and weighs 427 g (0.94 lb / 15.06 oz) (including batteries).
Below you can see the front view size comparison of Sony A6100 and Olympus PEN-F. Sony A6100 is 5mm narrower and 5mm shorter than Olympus PEN-F but it is also 12mm thicker.
Here is the back view size comparison of Sony A6100 and Olympus PEN-F.
Now lets look at the top view comparison of Sony A6100 and Olympus PEN-F.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Sony A6100 is 31g lighter than the Olympus PEN-F but we don't think this will make a significant difference.
Also keep in mind that body weight is not the only deciding factor when comparing two interchangeable camera bodies, you have to also take into account the lenses that you will be using with these bodies. Since Sony A6100 has an APS-C sized sensor and Olympus PEN-F has a smaller Four Thirds sensor, Olympus PEN-F's lenses for a similar focal length and aperture will generally be lighter and smaller than the Sony A6100 lenses.
Unfortunately neither Sony Alpha a6100 nor Olympus PEN-F provides any type of weather sealing in their body, 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
Sony A6100 and Olympus PEN-F's LCD screens has the same diagonal size of 3.00".
Sony A6100 features a Tilting only screen
which is mostly only good for shooting from waist or over the head levels. On the other hand, Olympus PEN-F sports a Fully Articulated screen
which is more flexible and useful especially for taking Selfie shots and video.