A rangefinder is a focus mechanism that allows the user to calculate the distance of a subject through the convergence of two images. Cameras that use this mechanism are usually referred to as ‘rangefinders’.

Rangefinder cameras were very popular in the 1950s, 60s and 70s. Single Lens Reflex (SLRs) and compact cameras largely replaced them in the 70s, 80s and 90s. What is not always appreciated is that rangefinders offer several tangible benefits over SLRs, not least in image quality. Indeed, many photographers would rate the Leica M Digital Rangefinder as one of the best cameras available today.