What is sensor size, and why does it matter?

(Image credit: Panasonic)

Inside every image-capturing device, from your smartphone to your Digital SLR, is a sensor. This sensor is what captures the light coming through the lens and ultimately results in a digital image being recorded. It works by capturing the light in tiny cavities called photosites. The bigger the photosites, the more light they’ll capture and the better the quality of the resulting pixels you get.

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Jon Adams

Jon started out as a film-maker, working as a cameraman and video editor before becoming a writer/director. He made corporate & broadcast programmes in the UK and Middle East, and also composed music, writing for TV, radio and cinema. Jon worked as a photographer and journalist alongside this, and took his video skills into magazine publishing, where he edited the Digital Photo magazine for over 15 years. He is an expert in photo editing, video making and camera techniques.