I found a set of Tominon macro lenses on e-bay a year or so ago for 50 - these were 135, 105, 50, 35 and 17 mm and have a fine 40 mm thread that fits right into a #1 shutter. They were made for use with the Polaroid MP3 and MP4 cameras. Can't say how they compare with macro lenses from Leica or Zeiss, etc., but can't complain about the price!