This device, with its Yvar 75mm f/2.8 lens, makes possible close-up work with Bolex H16 RX4 and RX5 cameras.  Rack-and-pinion focusing permits precision.  The compendium lens hood can also be used as a stage for filming.  A pair of adapters, marked ‘C’ and ‘R’, allow the attachment of other lenses (not specified and not included).   The factory box and its foam interior show signs of age, but the apparatus is in excellent condition.  The lens is also excellent.  Both front and rear caps are included.