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 D4 and Casio EX-Z16 side-by-side from the front, back and top in their relative dimensions. Nikon D4 has external dimensions of 160 x 157 x 91 mm (6.3 x 6.18 x 3.58″) and weighs 1340 g (2.95 lb / 47.27 oz) (including batteries). Casio EX-Z16 has external dimensions of 101 x 59 x 20 mm (3.98 x 2.32 x 0.79″) and weighs (including batteries).
Below you can see the front-view size comparison of the Nikon D4 and the Casio EX-Z16. Casio EX-Z16 is clearly the smaller of the two cameras. Its body is 59mm narrower, 98mm shorter and 71mm thinner than Nikon D4. As you can tell, actually this is not a fair size comparison since Casio EX-Z16 has a built-in lens but Nikon D4 doesn't. Once you put a lens on D4, its thickness will increase significantly.
Here is the back view size comparison of the Nikon D4 and Casio EX-Z16.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Casio EX-Z16 is 1340g lighter than the Nikon D4 but we don't think this will make a significant difference.
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 D4, the total kit will weigh much higher.
Weather Sealing
With its weather-sealed body, we believe that the D4 has a big advantage over the EX-Z16 which doesn't provide any kind of environmental sealing.
LCD Screen Size and Features
Nikon D4's 3.20" LCD screen is slightly larger than Casio EX-Z16's screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.