Size and weight is a big decision factor when you are trying to find the ideal camera for your needs.
In this section, We are going to illustrate Nikon P300 and Sony NEX-5N side-by-side from the front, back and top in their relative dimensions. Nikon P300 has external dimensions of 103 x 58 x 32 mm (4.06 x 2.28 x 1.26″) and weighs 189 g (0.42 lb / 6.67 oz) (including batteries). Sony NEX-5N has external dimensions of 111 x 59 x 38 mm (4.37 x 2.32 x 1.5″) and weighs 269 g (0.59 lb / 9.49 oz) (including batteries).
Below you can see the front view size comparison of Nikon P300 and Sony NEX-5N. Nikon P300 is clearly the smaller of the two cameras. Its body is 8mm narrower, 1mm shorter and 6mm thinner than Sony NEX-5N. As you can tell, actually this is not a fair size comparison since Nikon P300 has a built-in lens but Sony NEX-5N doesn't. Once you put a lens on NEX-5N, its thickness will increase significantly.
Comparison image of Nikon P300 and Sony NEX-5N Size, Weight and External Dimensions - Front View
Here is the back view size comparison of Nikon P300 and Sony NEX-5N.
Comparison image of Nikon P300 and Sony NEX-5N Size and Weight - Back View
Now lets look at the top view comparison of Nikon P300 and Sony NEX-5N.
Top View Comparison image of Nikon P300 and Sony NEX-5N Size
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Nikon P300 is significantly lighter (80g ) than the Sony NEX-5N 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 NEX-5N, the total kit will weigh much higher.
Weather Sealing
Unfortunately neither Nikon Coolpix P300 nor Sony Alpha NEX-5N provides any type of weather sealing in their body, 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 P300 and Sony NEX-5N's LCD screens has the same diagonal size of 3".
On the other hand, Sony NEX-5N 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 P300 has a fixed type screen which provides less flexibility in shooting positions compared to NEX-5N.