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 Casio EX-Z450 and Canon 1D MIV side-by-side from the front, back and top in their relative dimensions. Casio EX-Z450 has external dimensions of 81 x 56 x 21 mm (3.19 x 2.2 x 0.83″) and weighs 128 g (0.28 lb / 4.52 oz) (including batteries). Canon 1D MIV has external dimensions of 156 x 157 x 80 mm (6.14 x 6.18 x 3.15″) and weighs 1230 g (2.71 lb / 43.39 oz) (including batteries).
Below you can see the front view size comparison of Casio EX-Z450 and Canon 1D MIV. Casio EX-Z450 is clearly the smaller of the two cameras. Its body is 75mm narrower, 101mm shorter and 59mm thinner than Canon 1D MIV. As you can tell, actually this is not a fair size comparison since Casio EX-Z450 has a built-in lens but Canon 1D MIV doesn't. Once you put a lens on 1D MIV, its thickness will increase significantly.
Here is the back view size comparison of Casio EX-Z450 and Canon 1D MIV.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Casio EX-Z450 is significantly lighter (1102g ) than the Canon 1D MIV 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 1D MIV, the total kit will weigh much higher.
Thanks to the weather sealed body of 1D MIV, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to EX-Z450.
LCD Screen Size and Features
Casio EX-Z450 and Canon 1D MIV's LCD screens has the same diagonal size of 3".
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.