The following is a partial list of products manufactured under the Pentax brand. Film cameras 35 mm SLR cameras M37 screw mount Cameras using the M37 lens mount. Ashiflex I (1952–1953) Asahiflex Ia (1953–1954) — also sold as the Tower 23 Asahiflex IIb (1954–1957) — also sold as the Tower 23 Asahiflex IIa (1955–1957) — also sold as the Tower 22 and Tower 24 M42 screw mount Cameras using the M42 lens mount, also known as the Pentax screw mount. Asahi Pentax (1957) — also sold as the Tower 26 Asahi Pentax S (1958) — also sold as the Tower 26 Asahi Pentax K (1958) — also sold as the Tower 29 Asahi Pentax S2/H2 (1959) — also sold as the Honeywell Pentax H2/Honeywell Heiland Pentax H2 Asahi Pentax S3/H3 (1960) — also sold as the Honeywell Pentax H3/Honeywell Heiland Pentax H3 Asahi Pentax S1/H1 (1961) — also sold as the Honeywell Pentax H1/Honeywell Heiland Pentax H1 Asahi Pentax SV/H3v (1963) — also sold as the Honeywell Pentax H3v Asahi Pentax S1a/H1a (1963) — also sold as the Honeywell Pentax H1a/Honeywell Heiland Pentax H1a Pentax Spotmatic (1964) — also sold as Honeywell Pentax Spotmatic Asahi Pentax Spotmatic SL (1968) — also sold as the Honeywell Pentax Spotmatic SL] Asahi Pentax Spotmatic SP500 (1971) — also sold as the Honeywell Pentax Spotmatic SP500 Asahi Pentax Spotmatic II (1971) Honeywell Pentax Spotmatic IIa (1971) — USA only Asahi Pentax Spotmatic Electro-Spotmatic (1971) — limited release Japan only Asahi Pentax Spotmatic ES (1971) — also sold as the Honeywell Pentax Spotmatic ES Asahi Pentax Spotmatic SP1000 (1973) — also sold as the Honeywell Pentax Spotmatic SP1000 Asahi Pentax Spotmatic F (1973) — also sold as Honeywell Pentax Spotmatic F Asahi Pentax Spotmatic ES 2 (1973) — also sold as the Honeywell Pentax Spotmatic ES 2 Pentax K mount Cameras using the Pentax K lens mount. K series Pentax K2 (1975–1980) Pentax KX (1975–1977) Pentax KM (1975–1977) Pentax K1000/1 (1975–1978) Pentax K2DMD (1976–1980) M series Pentax ME (1976–1980) Pentax MX (1976–1985) Pentax K1000/2 (1978–1995) Pentax MV (1979–1981) Pentax MV 1 (1979–1981) Pentax ME Super (1980–1987) Pentax ME F (1981–1988) Pentax MG (1982–1985) L series Pentax LX (1980–2001) A series Pentax A3 (1985–1987) Pentax A3000 (1985–1987) Pentax Program A/Program Plus (1984–1988) Pentax Super A/Super Program (1983–1987) P series Pentax P3 (1985–1988) — Program and manual; flash bulb; tripod ready; shutter speeds of 1-1000 Pentax P30