Bright-Line Frames. The Leica Universal Wide-Angle Viewfinder M offers bright-line frames to match a 16-18-21mm lens. It also includes bright lines for 21, 24, and 28mm to account for the M8 digital camera’s 1.33x conversion factor. You can use this viewfinder with other fixed lenses in this range.

Parallax Compensation Dial. A parallax compensation dial lets you adjust the frame to the focusing distance in five steps—0.5m, 0.7m, 1.0m, 2.0 meter, and infinity.