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 Canon A3500 IS and Sony NEX-3 side-by-side from the front, back and top in their relative dimensions. Canon A3500 IS has external dimensions of 98 x 56 x 20 mm (3.86 x 2.2 x 0.79″) and weighs 135 g (0.30 lb / 4.76 oz) (including batteries). Sony NEX-3 has external dimensions of 117 x 62 x 33 mm (4.61 x 2.44 x 1.3″) and weighs 297 g (0.65 lb / 10.48 oz) (including batteries).
Below you can see the front-view size comparison of the Canon A3500 IS and the Sony NEX-3. Canon A3500 IS is clearly the smaller of the two cameras. Its body is 19mm narrower, 6mm shorter and 13mm thinner than Sony NEX-3. As you can tell, actually this is not a fair size comparison since Canon A3500 IS has a built-in lens but Sony NEX-3 doesn't. Once you put a lens on NEX-3, its thickness will increase significantly.
Now lets look at the top view comparison of Canon A3500 IS and Sony NEX-3.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Canon A3500 IS is significantly lighter (162g ) than the Sony NEX-3 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-3, the total kit will weigh much higher.
Weather Sealing
Unfortunately neither the Canon PowerShot A3500 IS nor Sony Alpha NEX-3 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
Canon A3500 IS and Sony NEX-3's LCD screens have the same diagonal size of 3.00 inches.
On the other hand, Sony NEX-3 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 Canon A3500 IS has a fixed type screen which provides less flexibility in shooting positions compared to NEX-3.