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 550D and Canon 60Da side-by-side from the front, back and top in their relative dimensions. Canon 550D has external dimensions of 129 x 98 x 62 mm (5.08 x 3.86 x 2.44″) and weighs 530 g (1.17 lb / 18.70 oz) (including batteries). Canon 60Da has external dimensions of 145 x 106 x 79 mm (5.71 x 4.17 x 3.11″) and weighs 755 g (1.66 lb / 26.63 oz) (including batteries).
Below you can see the front-view size comparison of the Canon 550D and the Canon 60Da. Canon 550D is clearly the smaller of the two cameras. Its body is 16mm narrower, 8mm shorter and 17mm thinner than Canon 60Da.
Comparison image of the Canon 550D and the Canon 60Da Size, Weight and External Dimensions - Front View
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Canon 550D is significantly lighter (225g ) than the Canon 60Da which may become a big advantage especially on long walking trips.
Also keep in mind that body weight is not the only deciding factor when comparing two interchangeable camera bodies, you also have to take into account the lenses that you will be using with these bodies. Since both Canon 550D and Canon 60Da have the same Canon EF/EF-S lens mount and APS-C sized sensors, lenses will not be a differentiator on total size of the system.
Weather Sealing
Thanks to the weather-sealed body of the 60Da, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to the 550D.
LCD Screen Size and Features
Canon 550D and Canon 60Da's LCD screens have the same diagonal size of 3.00 inches.
On the other hand, Canon 60Da 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 550D's LCD screen is a fixed type which provides almost no flexibility in shooting positions compared to 60Da.