Asahi Pentax Stereo Adapter set. 49mm mount

The Pentax 49mm Stereo Adapter is designed for use with the standard lens of the Pentax ME, MX or ME super, or even the 50mm F1.4 /50mm f/1.7/ 50mm f/1.8 lenses( filter size 49mm) .  Conventional stereoscopic photography provides a 3-dimensional effect by using 2 lenses and 2 pieces of film. With the use of the Pentax Stereo adapter , however you can produce the same 3-dimensional effect simply by attaching the accessory to any lens with a 49mm screw mount thread . To View the results insert the two-image film (in slide form) into the slot of the stereo viewer. Now a 3-dimensional picture appears for your eyes. (use only positive film for stereo photography.