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As well as affecting exposure, your choice of aperture also gives you control over the depth of field in an image, and this is one of the most potent weapons in the creative photographer's arsenal.

To learn more about how your aperture works, download our Free f-stop chart for understanding aperture, which is part of our ongoing photography cheat sheet series of infographics.

At any equivalent or effective focal length, larger sensors will give you a smaller depth of field - the depth of apparent sharpness in a picture.

As a result, the full-frame sensor size is ideal for portraiture, where you want to use a wide aperture to blur the background and make main subjects stand out (to learn more, see Full frame DSLR: do you really need one? The flip side is that APS-C cameras can be more useful than full-frame models when you want a large depth of field.

Fully articulated LCD screens can also flip around and fold back into the camera with the screen facing inwards.