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 D30 and Olympus E-M1 side-by-side from the front, back and top in their relative dimensions. Canon D30 has external dimensions of 109 x 68 x 28 mm (4.29 x 2.68 x 1.1″) and weighs 218 g (0.48 lb / 7.69 oz) (including batteries). Olympus E-M1 has external dimensions of 130 x 94 x 63 mm (5.13 x 3.68 x 2.48″) and weighs 497 g (1.10 lb / 17.53 oz) (including batteries).
Below you can see the front-view size comparison of the Canon D30 and the Olympus E-M1. Canon D30 is clearly the smaller of the two cameras. Its body is 21mm narrower, 26mm shorter and 35mm thinner than Olympus E-M1. As you can tell, actually this is not a fair size comparison since Canon D30 has a built-in lens but Olympus E-M1 doesn't. Once you put a lens on E-M1, its thickness will increase significantly.
Here is the back view size comparison of the Canon D30 and Olympus E-M1.
Now lets look at the top view comparison of Canon D30 and Olympus E-M1.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Canon D30 is significantly lighter (279g ) than the Olympus E-M1 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-M1, the total kit will weigh much higher.
Weather Sealing
LCD Screen Size and Features
Canon D30 and Olympus E-M1's LCD screens have the same diagonal size of 3.00 inches.
On the other hand, Olympus E-M1 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 D30 has a fixed type screen which provides less flexibility in shooting positions compared to E-M1.