HR - Rubber type
HS - Snap-on type
HN - Screw-in (Nejikomi) type
HK - Slip-on (Kabuse) type
HB - Bayonet type
HE - Extension type
1.[F f=5.8cm 1:1.4 (LogoMark) Nikon F JAPAN U.S. PAT. J.PAT. PEND] ^outline "F" ^logomark of "Nippon Kogaku" (hexagon and lens) 2.[f=5.8cm 1:1.4 Nikon F JAPAN U.S. PAT. J.PAT. PEND] 3.[f=50mm f=58mm 1:1.4 Nikon F JAPAN U.S. PAT. J.PAT. PEND] 4.[f=50mm f=58mm 1:1.4 Nikon F JAPAN] 5.[50/1.4 F NIKKOR JAPAN] ^outline "F" 6.[Nikon HS-1 JAPAN 50/1.4]