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 FujiFilm S2800HD and Sony A37 side-by-side from the front, back and top in their relative dimensions. FujiFilm S2800HD has external dimensions of 110 x 74 x 82 mm (4.33 x 2.91 x 3.23″) and weighs 437 g (0.96 lb / 15.41 oz) (including batteries). Sony A37 has external dimensions of 124 x 92 x 85 mm (4.88 x 3.62 x 3.35″) and weighs 506 g (1.12 lb / 17.85 oz) (including batteries).
Below you can see the front view size comparison of FujiFilm S2800HD and Sony A37. FujiFilm S2800HD is clearly the smaller of the two cameras. Its body is 14mm narrower, 18mm shorter and 3mm thinner than Sony A37. As you can tell, actually this is not a fair size comparison since FujiFilm S2800HD has a built-in lens but Sony A37 doesn't. Once you put a lens on A37, its thickness will increase significantly.
Here is the back view size comparison of FujiFilm S2800HD and Sony A37.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
FujiFilm S2800HD is 69g lighter than the Sony A37 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 A37, the total kit will weigh much higher.
Unfortunately neither FujiFilm FinePix S2800HD (FinePix S2900HD) nor Sony SLT-A37 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 Bridge Cameras with Weather Sealing Top DSLR Cameras with Weather Sealing
LCD Screen Size and Features
FujiFilm S2800HD's 3" LCD screen is slightly larger than Sony A37's 2.6" screen.
On the other hand, Sony A37 LCD screen has a Tilting feature
where you can change the angle of the screen to make it easier to shoot from waist or over the head levels. On the other hand, FujiFilm S2800HD has a fixed type screen which provides less flexibility in shooting positions compared to A37.