They were considered an oddity a few years ago but are rapidly going mainstream thanks to the fact they deliver very good quality pictures and videos without weighing a tonne (well, in digital terms at least). We are talking about mirrorless cameras, those compact shooters that pack in switchable lenses like their high-profile DSLR brothers but come in form factors that are more in line with easily pocketable digital cameras. And ironically, one of the world’s leading brands in cameras — Canon — has only now really come to the mirrorless battle with its EOS-M.