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 S9100 and Olympus E-PL7 side-by-side from the front, back and top in their relative dimensions. Nikon S9100 has external dimensions of 105 x 62 x 35 mm (4.13 x 2.44 x 1.38″) and weighs 214 g (0.47 lb / 7.55 oz) (including batteries). Olympus E-PL7 has external dimensions of 115 x 67 x 38 mm (4.53 x 2.64 x 1.5″) and weighs 357 g (0.79 lb / 12.59 oz) (including batteries).
Below you can see the front-view size comparison of the Nikon S9100 and the Olympus E-PL7. Nikon S9100 is clearly the smaller of the two cameras. Its body is 10mm narrower, 5mm shorter and 3mm thinner than Olympus E-PL7. As you can tell, actually this is not a fair size comparison since Nikon S9100 has a built-in lens but Olympus E-PL7 doesn't. Once you put a lens on E-PL7, its thickness will increase significantly.
Here is the back view size comparison of the Nikon S9100 and Olympus E-PL7.
Now lets look at the top view comparison of Nikon S9100 and Olympus E-PL7.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Nikon S9100 is significantly lighter (143g ) than the Olympus E-PL7 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-PL7, the total kit will weigh much higher.
Weather Sealing
Unfortunately neither the Nikon Coolpix S9100 nor Olympus PEN E-PL7 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 S9100 and Olympus E-PL7's LCD screens have the same diagonal size of 3.00 inches.
On the other hand, Olympus E-PL7 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 S9100 has a fixed type screen which provides less flexibility in shooting positions compared to E-PL7.