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 Panasonic GF6 and Sony a3500 side-by-side from the front, back and top in their relative dimensions. Panasonic GF6 has external dimensions of 111 x 65 x 38 mm (4.37 x 2.56 x 1.5″) and weighs 323 g (0.71 lb / 11.39 oz) (including batteries). Sony a3500 has external dimensions of 128 x 91 x 85 mm (5.04 x 3.58 x 3.35″) and weighs 411 g (0.91 lb / 14.50 oz) (including batteries).
Below you can see the front-view size comparison of the Panasonic GF6 and the Sony a3500. Panasonic GF6 is clearly the smaller of the two cameras. Its body is 17mm narrower, 26mm shorter and 47mm thinner than Sony a3500.
Now lets look at the top view comparison of Panasonic GF6 and Sony a3500.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Panasonic GF6 is significantly lighter (88g ) than the Sony a3500 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 Sony a3500 has an APS-C sized sensor and Panasonic GF6 has a smaller Four Thirds sensor, Panasonic GF6's lenses for a similar focal length and aperture will generally be lighter and smaller than the Sony a3500 lenses.
Weather Sealing
Unfortunately neither the Panasonic Lumix DMC-GF6 nor Sony Alpha a3500 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
Panasonic GF6 and Sony a3500's LCD screens have the same diagonal size of 3.00 inches.
On the other hand, Panasonic GF6 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 Sony a3500 has a fixed type screen which provides less flexibility in shooting positions compared to GF6.