The dimensions of the 550D make it average for this type of model, although size is less critical when it comes to DSLRs. Importantly there is ample handgrip on the right-hand side to keep the camera steady whilst shooting, with a textured thumb grip on the back.

The controls fall in place for the fingers of the right hand to operate in most situations without being too much of a stretch. As usual the top of the camera offers the shutter release, mode dial, the power switch and an ISO button. There is also a dial for changing settings values, although depending in which menus you are in, sometimes you'll use the arrow buttons on the rear instead.

The rear of the camera offers up the usual four-way controls centred around a ""set"" or ok button, with shortcuts for focusing mode, white balance, picture style and shooting mode (including self timer). A Live View and video capture button sits up next to the viewfinder, with exposure compensation, Quick menu access, and image playback running down the right-hand edge of the screen. Two rear facing shoulder buttons give you control over the 9-point focusing system and AE/FE lock. A delete button is also present, tucked out of place where you are unlikely to accidentally hit it and the main menu and display options controls are set across to the left side of the viewfinder, as lesser used buttons.

Given the expanding remit of DSLR cameras, providing access to the right features now takes precedence and the layout and functions are considerably better than something like the ageing 400D. Of course there is also the pop-up button for the built-in flash and the depth of field preview button on the front of the camera. The latter button lets you see the effect your selected aperture will have on the shot, without having to shoot twice and compare the differences.