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 Canon SX120 IS and Olympus E-5 side-by-side from the front, back and top in their relative dimensions. Canon SX120 IS has external dimensions of 111 x 71 x 45 mm (4.37 x 2.8 x 1.77″) and weighs 285 g (0.63 lb / 10.05 oz) (including batteries). Olympus E-5 has external dimensions of 143 x 117 x 75 mm (5.63 x 4.61 x 2.95″) and weighs 800 g (1.76 lb / 28.22 oz) (including batteries).
Below you can see the front view size comparison of Canon SX120 IS and Olympus E-5. Canon SX120 IS is clearly the smaller of the two cameras. Its body is 32mm narrower, 46mm shorter and 30mm thinner than Olympus E-5. As you can tell, actually this is not a fair size comparison since Canon SX120 IS has a built-in lens but Olympus E-5 doesn't. Once you put a lens on E-5, its thickness will increase significantly.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Canon SX120 IS is significantly lighter (515g ) than the Olympus E-5 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-5, the total kit will weigh much higher.
Thanks to the weather sealed body of E-5, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to SX120 IS.
LCD Screen Size and Features
Canon SX120 IS and Olympus E-5's LCD screens has the same diagonal size of 3".
On the other hand, Olympus E-5 sports a Fully Articulated screen
which you can change the angle and position of the screen almost freely, making it possible to shoot from waist or over the head levels, and especially very useful for shooting selfies and video. Canon SX120 IS's LCD screen is a fixed type which provides almost no flexibility in shooting positions compared to E-5.