The Icarex series was designed by Voigtländer
and sold with the Zeiss Ikon Voigtländer brand name.
All cameras have interchangeable bayonet or M42 mount lenses
and a cloth focal plane shutter 1/1000,
interchangeable viewing screens and viewfinders but the Icarex 35S came with a fixed prism.
Rollei bought the brand and the cameras became with slight changes the VSL1, VSL2 and VSL3.