The Praktiflex mount was a screw thread lens mount, with a diameter of 40mm, introduced with the Praktiflex, a 35mm SLR by KW.

Very soon KW abandoned the 40mm mount and adopted the 42mm screw mount introduced with the Contax S. Today the Praktiflex lenses are rare.

We can attempt to make a list of the Praktiflex lenses.

Carl Zeiss Jena[]

  • 5.8cm f/2 Biotar
  • 5cm f/2.8 Xenar
  • 12cm f/4.5 Meyer Trioplan
  • 5 cm. f/3.5 Zeiss Tessar
  • 5 cm f/2.9 Victar