Keywords: Steinheil Doppel-Anastigmat Unofocal PRINT.jpg en Doppel-Anastigmat of German optics company Steinheil Crpped from LA2-Blitz-0307 jpg which is in the Public Domain Meyers Blitz Lexikon Trinitrix 2010-02-20 LA2-Blitz-0307 jpg LA2-Blitz Steinheil lenses Unofocal Photographic lenses Anastigmat |