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 Nikon P310 and Olympus E-M10 II side-by-side from the front, back and top in their relative dimensions. Nikon P310 has external dimensions of 103 x 58 x 32 mm (4.06 x 2.28 x 1.26″) and weighs 194 g (0.43 lb / 6.84 oz) (including batteries). 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).
Below you can see the front-view size comparison of the Nikon P310 and the Olympus E-M10 II. Nikon P310 is clearly the smaller of the two cameras. Its body is 17mm narrower, 25mm shorter and 15mm thinner than Olympus E-M10 II. As you can tell, actually this is not a fair size comparison since Nikon P310 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 Nikon P310 and Olympus E-M10 II.
Now lets look at the top view comparison of Nikon P310 and Olympus E-M10 II.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Nikon P310 is significantly lighter (196g ) than the Olympus E-M10 II 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 Nikon Coolpix P310 nor Olympus OM-D E-M10 II 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 Compact Cameras with Weather Sealing Top Mirrorless Cameras with Weather Sealing
LCD Screen Size and Features
Nikon P310 and Olympus E-M10 II's LCD screens have the same diagonal size of 3.00 inches.
On the other hand, Olympus E-M10 II 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 Nikon P310 has a fixed type screen which provides less flexibility in shooting positions compared to E-M10 II.