Thread Mount Lenses x Aperture

adapted from Stephen Gandy's & Issei Yoshida's lists

• 28mm f/5.6 Summaron Era - 1955-1963
• 28mm f/6.3 Hektor Era - 1935-1955

• 35mm f/2 Summicron ASPH Era - August 1999-Current
• 35mm f/2 Summicron Era - 1958-1962 or {1963 Issei Yoshida)

• 35mm f/3.5 Elmar Era - 1930-1950
• 35mm f/3.5 Summaron Era - 1949-1960 or {1946-1960 Issei Yoshida}

• 50mm f/1.4 Summilux Era - 1960-1963 Issei Yoshida}
• 50mm f/1.4 Summilux Era - August 1999-
• 50mm f/1.5 Xenon Era - 1936-1950
• 50mm f/1.5 Summarit Era - 1949-1960
• 50mm f/2 Summicron Era - August 1999-
• 50mm f/2 Summicron Collapsible Era - 1953-1960
• 50mm f/2 Summicron Era - 1960-1963
• 50mm f/2 Summitar Era - 1939-1955
• 50mm f/2 Summar Era - 1933-1940
• 50mm f/2.5 Hektor Collapsible Era - 1931-1948
• 50mm f/2.8 Elmar Collapsible Era - 1957-1962
• 50mm f/3.5 Elmar Collapsible Era - 1931-1959 or (1924-1959 Issei Yoshida)

• 73mm f/1.9 Hektor Era - 1931-1946 or (1935-1949 Issei Yoshida}

• 85mm f/1.5 Summarex Era - 1943-1960

• 90mm f/2 Summicron Era - 1957-1962 very rare
• 90mm f/2.2 Thambar Era - 1935-1949
• 90mm f/4 Elmar Era - 1931-1963

• 105mm f/6.3 Elmar Era - 1932-1937

• 125mm f/2.5 Hektor Era - 1954-1963

• 135mm f/4.5 Elmar Era - 1931-1936
• 135mm f/4.5 Hektor Era - 1933-1960