The Adams Minex reflex camera was introduced in 1909 and was a development of the Videx camera of 1903. The Videx incorporated a revolving back, which Adams claimed as a first, and this was included on the Minex which coupled it to internal viewfinder masks. The camera was innovative in that it incorporated Adams patented mirror mechanism with a sprung mirror that raised when the camera shutter release button was pressed rather than using the pressure on the release button to raise the mirror. It returned to the viewing position when the shutter was re-tensioned. Further refinements were added in 1927 and the BJPA stated: 'It is unnecessary to refer to the many elegant movements and items of design in the Minex, including the unique four-way swing front, since these have been so well known for many years and have universally commended the admiration of users of reflex cameras'. The Minex was made in sizes from 3½ x 2½ inches to half-plate at prices from £53 to £75.