Jan-Apr
Sep-Dec
May-Aug
Jan-Dec
1 = SMC Pentax 50mm/1.2 2 = SMC Pentax-A 50mm/1.2 3 = SMC Pentax-M 50mm/1.4 4 = SMC Pentax-A 50mm/1.4 5 = SMC Pentax-A 50mm/1.7