I have to say a light meter is something that most photographers think they don't need and maybe they don't given the technology found in modern cameras. However, what most don't realise is there is a massive difference between reflected light which your camera sees and the incident light which is the light falling on your subject. For some basic daylit scenes my camera was over a stop out compared to my meter. This is because a camera is easily tricked by light or dark subjects. When using flash, even in this modern digital age, a good flash meter is indispensable.