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The acronym SLR stands for ‘Single Lens Reflex’. When you use an SLR, the picture is composed and taken through the camera’s single lens. ‘Reflex’ refers to the mirror which is used to reflect the image up into the viewfinder until the moment the shutter is released. The mirror flips up out of the way and the image then passes to the sensor at the back of the camera.

Low-cost digital SLRs have 6-10 megapixel sensors which can yield very good results, but it is worth paying a little extra for a camera with more pixels. The difference in fine detail is visible.