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 Nikon L830 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). Nikon L830 has external dimensions of 110 x 76 x 91 mm (4.33 x 2.99 x 3.58″) and weighs 508 g (1.12 lb / 17.92 oz) (including batteries).
Below you can see the front-view size comparison of the Olympus E-M10 II and the Nikon L830. Nikon L830 is 10mm narrower and 7mm shorter than Olympus E-M10 II but it is also 44mm thicker. As you can tell, actually this is not a fair size comparison since Nikon L830 has a built-in lens but Olympus E-M10 II doesn't. Once you put a lens on E-M10 II, its thickness will increase significantly.
Here is the back view size comparison of the Olympus E-M10 II and Nikon L830.
Now lets look at the top view comparison of Olympus E-M10 II and Nikon L830.
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 (118g ) than the Nikon L830 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 II, the total kit will weigh much higher.
Weather Sealing
Unfortunately neither the Olympus OM-D E-M10 II nor Nikon Coolpix L830 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 Bridge Cameras with Weather Sealing
LCD Screen Size and Features
Olympus E-M10 II and Nikon L830's LCD screens have the same diagonal size of 3.00 inches.
Both cameras feature
Tilting screens where you can change the angle of the screen to make it easier to shoot from waist or over-the-head levels.