Voigtlander 21mm and 25mm Metal Viewfinder, Black
The new 21/25 Viewfinder from Voigtlander obsolesces the need to carry around a bag of viewfinders for your wide-angle needs.
Its two sets of framelines replace the 21mm and 25mm prime finders. It is just as bright as its predecessors, and just as well built. Cosina is a true innovator