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 G9 and OM System OM-1 side-by-side from the front, back and top in their relative dimensions. Panasonic G9 has external dimensions of 137 x 97 x 92 mm (5.39 x 3.82 x 3.62″) and weighs 658 g (1.45 lb / 23.21 oz) (including batteries). OM System OM-1 has external dimensions of 135 x 92 x 73 mm (5.3 x 3.6 x 2.87″) and weighs 599 g (1.32 lb / 21.13 oz) (including batteries).
Below you can see the front-view size comparison of the Panasonic G9 and the OM System OM-1. OM System OM-1 is clearly the smaller of the two cameras. Its body is 2mm narrower, 5mm shorter and 19mm thinner than Panasonic G9.
Here is the back view size comparison of the Panasonic G9 and OM System OM-1.
Now lets look at the top view comparison of Panasonic G9 and OM System OM-1.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
OM System OM-1 is 59g lighter than the Panasonic G9 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 also have to take into account the lenses that you will be using with these bodies. Since both Panasonic G9 and OM System OM-1 have the same Micro Four Thirds lens mount and Four Thirds sized sensors, lenses will not be a differentiator on total size of the system.
Weather Sealing
Both the G9 and the OM-1 have weather sealings in their bodies, making them resistant to water and dust.
LCD Screen Size and Features
Panasonic G9 and OM System OM-1's LCD screens have the same diagonal size of 3.00 inches.
Both cameras feature
Fully Articulating screens where you can change the angle of the screen to make it easier to shoot from waist or over-the-head levels. Fully articulating screens are also useful for taking Selfies and video.