Cosina Cosinon Auto 55mm F/2.1

akaVivitar Auto 55mm F/2.1

Standard prime lens • Film era • Discontinued

  • Announced:
  • · No data
  • Production status:
  • ● Discontinued
  • Country of design:
  • · Japan
  • Original name:
  • · COSINON AUTO F=2.1 f=55mm
  • Class:
  • · Fast full-frame standard prime lens
  • System:
  • · Cosina M42 (1968)

Specification

Optical design:
35mm full frame
55mm
F/2.1
4 elements in 4 groups
M42 [45.5mm]
Pentax K [45.5mm]
42.9° (35mm full frame)
On Pentax K APS-C [1.53x] cameras:
35mm equivalent focal length:
84.2mm (in terms of field of view)
35mm equivalent speed:
F/3.2 (in terms of depth of field)
Diagonal angle of view:
28.8°
Diaphragm mechanism:
Diaphragm type:
Automatic
Aperture control:
Aperture ring (Manual settings only)
6 (six)
Focusing:
0.60m
<No data>
Focusing modes:
Manual focus only
Manual focus control:
Focusing ring
Physical characteristics:
160g (mount not specified)
⌀61×36mm (mount not specified)
Accessories:
Screw-type 49mm
<No data>
<No data>

Source of data

  • Manufacturer's technical data.

From the editor

The lens originally belonged to the Cosina M42 screw mount system, but after the transition to bayonet mounts it was also produced in version with the Pentax K mount.

The same lens was sold under the name Vivitar 55MM 1:2.1 AUTO U MOUNT.

Other standard prime lenses in the Cosina M42 system

■M42 mount (9)
Cosina Cosinon Auto 50mm F/1.9
akaVivitar Auto 50mm F/1.9		A6 - 40.50m⌀49 ●
Cosina Cosinon Auto 50mm F/1.8
akaEdixa Auto 50mm F/1.8
akaExaktar Auto 50mm F/1.8
akaKobanar Auto 50mm F/1.8
akaPorst Color Reflex Auto 50mm F/1.8
akaRevuenon Auto 50mm F/1.8
akaVivitar Auto 50mm F/1.8		A6 - 40.50m⌀49 1970 ●
Cosina Cosinon Auto 50mm F/1.7 [MC]
akaPorst Color Reflex Auto 50mm F/1.7
akaSuper Carenar 50mm F/1.7
akaVivitar Auto 50mm F/1.7 [VMC]		A6 - 40.50m⌀49 1970 ●
Cosina Cosinon Auto 55mm F/2.8 Type 2
akaCarenar 55mm F/2.8
akaExaktar Auto 55mm F/2.8
akaPetri C.C Auto 55mm F/2.8
akaPorst Color Reflex Auto 55mm F/2.8 D
akaRevuenon Auto 55mm F/2.8		A4 - 30.90m⌀49 ●
Cosina Cosinon Auto 55mm F/2.8 Type 1
akaEdixa Auto 55mm F/2.8
akaPorst Color Reflex Auto 55mm F/2.8
akaRevuetar Auto 55mm F/2.8
akaSuper Carenar 55mm F/2.8
akaVivitar Auto 55mm F/2.8		A4 - 30.90m⌀49 1968 ●
Cosina Cosinon Auto 55mm F/1.8A? - ?0.50m 1968 ●
Cosina Cosinon Auto 55mm F/1.4 [MC]
akaExaktar Auto 55mm F/1.4
akaKobanar Auto 55mm F/1.4
akaPanorama Auto 55mm F/1.4
akaPorst Color Reflex Auto 55mm F/1.4 [MC] [G]
akaRevuenon Auto 55mm F/1.4
akaSuper Carenar 55mm F/1.4
akaSuper Reflecta 55mm F/1.4
akaVivitar Auto 55mm F/1.4 VMC		A7 - 50.50m⌀55 1968 ●
Cosina Cosinon Auto 55mm F/1.2 MC Type 1A7 - 60.50m⌀55 ●
Cosina Cosinon Auto 55mm F/1.2 MC Type 2A7 - 50.50m⌀55 ●

Lenses with similar focal length

■M42 mount (119)
Asahi SMC Takumar 55mm F/2 [37109]A6 - 50.45m⌀49 1973 ●
Asahi SMC Takumar 50mm F/1.4 [37908]A7 - 60.45m⌀49 1972 ●
Asahi Super-Multi-Coated Takumar 55mm F/1.8 [37101, 37104, 37106]A6 - 50.45m⌀49 1971 ●
Asahi Auto-Takumar 55mm F/1.8 [332]S6 - 50.55m⌀46 1958 ●
Asahi Auto-Takumar 55mm F/2 [341, 34100]S6 - 50.55m⌀46 1958 ●
Asahi Takumar 55mm F/2.2P5 - 50.55m⌀46 1957 ●
Asahi Takumar 58mm F/2P6 - 40.60m⌀46 1957 ●
Asahi Takumar 58mm F/2.4P5 - 30.60m⌀46 1957 ●
Asahi Auto-Takumar 55mm F/2.2S6 - 50.55m⌀46 1961 ●
Asahi Auto-Takumar 55mm F/1.9S6 - 50.55m⌀46 1958 ●
Asahi Super-Takumar 50mm F/1.4 [378, 37800, 37801]A7 - 60.45m⌀49 1965 ●
Asahi Super-Takumar 50mm F/1.4 [358, 35800]A8 - 60.45m⌀49 1964 ●
Asahi Super-Multi-Coated Takumar 50mm F/1.4 [37902]A7 - 60.45m⌀49 1971 ●
Asahi Takumar 55mm F/1.8P6 - 50.55m⌀46 1958 ●
Asahi Auto-Takumar 55mm F/1.8 [345]A6 - 50.45m⌀49 1960 ●
Asahi Super-Takumar 55mm F/1.8 [345-2, 345-5, 33450, 34520]A6 - 50.45m⌀49 1962 ●
Asahi Super-Takumar 55mm F/1.8 [371, 37100, 37101, 37104, 37106]A6 - 50.45m⌀49 1965 ●
Asahi SMC Takumar 55mm F/1.8 [37108]A6 - 50.45m⌀49 1972 ●
Asahi Super-Takumar 55mm F/2 [345-1, 345-6, 345-3]A6 - 50.45m⌀49 1962 ●
Asahi Super-Takumar 55mm F/2 [37102, 37103, 37107]A6 - 50.45m⌀49 1965 ●
Asahi Super-Takumar 50mm F/1.4 for SL [37802]A7 - 60.45m⌀49 1969 ●
Chinon Auto 55mm F/1.4 [Multi-Coated]
akaArgus Auto-Cintar 55mm F/1.4
akaAuto-Alpa 55mm F/1.4 Multi-Coated
akaGAF Auto 55mm F/1.4
akaPorst Color Reflex Auto 55mm F/1.4 MC G
akaRevuenon Auto 55mm F/1.4 [Multi-Coated]		A? - ?0.50m⌀55 ●
Chinon Auto 55mm F/1.7 [Multi-Coated]
akaArgus Auto-Cintar 55mm F/1.7
akaEdixon Auto 55mm F/1.7
akaHanimar 55mm F/1.7
akaReflecta Auto 55mm F/1.7
akaRevuenon Auto 55mm F/1.7
akaWeltblick Auto Super 55mm F/1.7		A6 - 40.50m⌀52 ●
Cosina Tokyo Kogaku Auto-Topcor 58mm F/1.4 (1600 units)A7 - 60.45m⌀58 2003 ●
Fuji Photo Film [EBC] Fujinon 55mm F/1.8A6 - 40.45m⌀49 1970 ●
Fuji Photo Film Fujinon 55mm F/2.2A4 - 40.60m⌀49 1975 ●
Fuji Photo Film Fujinon 55mm F/1.6A5 - 40.60m⌀49 1978 ●
Fuji Photo Film [EBC] Fujinon 50mm F/1.4A7 - 60.45m⌀49 1970 ●
Mamiya/Sekor Auto 50mm F/2A6 - 40.50m⌀52 1966 ●
Mamiya/Sekor SX Auto 50mm F/2A6 - 40.45m⌀52 1974 ●
Mamiya/Sekor Auto 55mm F/1.8A6 - 40.50m⌀52 1966 ●
Mamiya/Sekor SX Auto 55mm F/1.4A7 - 50.45m⌀52 1974 ●
Mamiya/Sekor SX Auto 55mm F/1.8A6 - 50.45m⌀52 1974 ●
Mamiya/Sekor Auto 50mm F/2.8A4 - 30.50m⌀52 ●
Mamiya/Sekor Auto 55mm F/1.4A7 - 50.50m⌀55 ●
Mamiya-Sekor 58mm F/1.7 for CPA6 - 40.50m⌀52 1964 ●
Meyer-Optik Gorlitz Domiplan 50mm F/2.8
akaPentacon Orestor 50mm F/2.8
akaPentaflex-Color 50mm F/2.8		A3 - 30.75m⌀49 1961 ●
Meyer-Optik Gorlitz Oreston 50mm F/1.8A6 - 40.33m⌀49 1965 ●
Meyer-Optik Gorlitz Primotar 50mm F/2.8P4 - 30.60m⌀40.5 1959 ●
Meyer-Optik Gorlitz Primoplan 58mm F/1.9 VP5 - 40.60m⌀49 1952 ●
Olympus G.Zuiko Auto-S 50mm F/1.4 for FTLA7 - 60.40m⌀49 1970 ●
Olympus F.Zuiko Auto-S 50mm F/1.8 for FTLA6 - 50.40m⌀49 1970 ●
P. Angenieux Paris 50mm F/1.5 Type S21M6 - 4 1953 ●
Pentacon 50mm F/1.8 auto / electric Multi Coating
akaRevuenon Auto 50mm F/1.8 Multi Coating		A6 - 40.33m⌀49 ●
Pentacon 50mm F/1.8 auto / electric
akaPentaflex Auto-Color 50mm F/1.8		A6 - 40.33m⌀49 1971 ●
Kuribayashi C.C. Petri Orikkor 50mm F/2P7 - 40.50m⌀49 1959 ●
Petri C.C Auto 55mm F/1.8A6 - 40.60m⌀52 1973 ●
Petri C.C Auto 55mm F/1.7
akaPromatic C.C Auto 55mm F/1.7		A6 - 40.60m⌀52 1976 ●
Petri C.C Auto 50mm F/1.7A6 - 40.60m⌀49 1976 ●
Petri C.C Auto 55mm F/1.4A7 - 50.60m⌀55 1973 ●
Ricoh Rikenon Auto 50mm F/1.7A6 - 50.50m⌀52 ●
Ricoh Rikenon Auto 50mm F/1.7 EEA? - ?0.50m ●
Ricoh Rikenon Auto 55mm F/2.8A4 - 30.90m ●
Ricoh Rikenon Auto 50mm F/2.8A4 - 30.80m⌀52 ●
Ricoh Rikenon Auto 50mm F/2A6 - 50.50m⌀52 ●
Ricoh Rikenon Auto 50mm F/1.4 EEA? - ?0.50m ●
Ricoh Rikenon Auto 55mm F/1.8A? - ?0.50m⌀52 ●
Ricoh Rikenon Auto 55mm F/1.4A6 - 50.50m⌀52 ●
Schneider-Kreuznach Xenar 50mm F/2.8A4 - 30.50m⌀49 ●
Schneider-Kreuznach Xenon 50mm F/1.9 Type 1A6 - 42.5 ft.S.VI 1952 ●
Schneider-Kreuznach Xenon 50mm F/1.9 Type 3A6 - 40.50m⌀49 1966 ●
Industar-61 L/Z 50mm F/2.8 [MC]
akaИНДУСТАР-61Л/З 50mm F/2.8
akaИНДУСТАР-61Л/З-МС 50mm F/2.8		P4 - 30.30m⌀49 ●
Helios-77M-4 50mm F/1.8 MC
akaГЕЛИОС-77М-4 50mm F/1.8 МС		A6 - 40.45m⌀52 1991 ●
Zenitar-M 50mm F/1.7 [MC]
akaЗЕНИТАР-М 50mm F/1.7 [МС]		A6 - 50.45m⌀52 1977 ●
Zenitar-M 50mm F/1.9 MC
akaЗЕНИТАР-М 50mm F/1.9 МС		A6 - 40.45m⌀52 1991 ●
Industar-61M 50mm F/2.8
akaИНДУСТАР61-М 50mm F/2.8		A4 - 30.40m⌀52 ●
Zenitar-ME1 50mm F/1.7 MC
akaЗЕНИТАР-МЕ1 50mm F/1.7 МС		A6 - 50.45m⌀52 1980 ●
Helios-44-2 58mm F/2
akaГЕЛИОС-44-2 58mm F/2		P6 - 40.50m⌀49 1966 ●
Helios-44M 58mm F/2 [MC]
akaГЕЛИОС-44М 58mm F/2 [МС]		A6 - 40.50m⌀52 1972 ●
Helios-44-3 58mm F/2 MC
akaГелиос-44-3 58mm F/2 МС		P6 - 40.50m⌀52 ●
Zenitar 50mm F/2 MCA6 - 40.35m⌀46 1995 ●
Era-6M 50mm F/1.5 Type 2
akaЭРА-6М 50mm F/1.5		A6 - 50.50m⌀58 1977 ●
Era-6M 50mm F/1.5 Type 1
akaЭРА-6М 50mm F/1.5		A6 - 50.30m⌀58 1972 ●
Jupiter-Super-M1 50mm F/2 MCA6 - 40.40m⌀52 1998 ●
Steinheil Munchen Cassar S 50mm F/2.8M3 - 30.90m⌀40.5 1955 ●
Steinheil Munchen Cassarit 50mm F/2.8P3 - 30.50m ●
Steinheil Munchen Culminar 50mm F/2.8P4 - 30.50m ●
Steinheil Munchen Auto-D-Quinon 55mm F/1.9 for Edixa-MATA6 - 40.35m⌀49 ●
Steinheil Munchen Quinon 55mm F/1.9 Optigon-Automatic FlashS6 - 40.50m⌀49 ●
Steinheil Auto-Cassaron 50mm F/2.8 Type 2 for EdixaA3 - 30.80m ●
Steinheil Munchen Cassarit 50mm F/2.8 for EdixaA3 - 30.80m ●
Steinheil Auto-Cassaron 50mm F/2.8 Type 2A3 - 30.80m ●
Steinheil Auto-Cassaron 50mm F/2.8 Type 1A3 - 30.80m ●
Tomioka Yashinon Auto 55mm F/1.2A7 - 60.50m⌀55 1970 ●
Tomioka Chinon Auto 55mm F/1.2A7 - 60.50m⌀55 1970 ●
Tomioka Yashinon DS-M Auto 55mm F/1.2A7 - 60.50m⌀55 1973 ●
Tomioka Cosinon Auto 55mm F/1.2A7 - 60.50m⌀55 1970 ●
Tomioka Revuenon Auto 55mm F/1.2A7 - 60.50m⌀55 1970 ●
Tomioka Tominon Auto 55mm F/1.2A7 - 60.50m⌀55 1970 ●
Tomioka Tominon C. 50mm F/2S6 - 40.55m⌀46 ●
Tomioka Chinon Auto 55mm F/1.4
akaBeroflex Ultra Auto 55mm F/1.4
akaSuper Reflecta 55mm F/1.4
akaTomioka Revuenon Auto 55mm F/1.4		A7 - 50.50m⌀55 ●
Vivitar Auto 55mm F/1.2 VMC (s/n 9xxxxxxx)A7 - 50.50m⌀55 ●
Yashica Yashinon-DX Auto 50mm F/1.4A7 - 60.50m⌀55 ●
Yashica Yashinon DS-M Auto 50mm F/1.7A6 - 50.50m⌀52 ●
Yashica Yashinon Auto 55mm F/1.8A6 - 50.50m ●
Yashica Yashinon-DS Auto 50mm F/1.7A6 - 50.50m⌀52 ●
Yashica Yashinon Auto 50mm F/2S6 - 40.55m⌀46 1961 ●
Yashica Yashinon-DS Auto 50mm F/1.4A7 - 60.50m⌀55 ●
Yashica Yashinon-DX Auto 50mm F/1.7A6 - 50.50m⌀52 ●
Yashica Yashinon-DX Auto 50mm F/2A6 - 50.50m⌀52 ●
Yashica Yashinon-DS Auto 50mm F/1.9A6 - 50.50m⌀52 ●
Yashica Yashinon DS-M Auto 50mm F/1.4A7 - 60.50m⌀55 ●
Yashica Yashinon-DS Auto 50mm F/2A6 - 50.50m⌀52 ●
Risespray 50mm F/1.7 SLRM6 - 50.50m⌀52 ●
Carl Zeiss Classic Planar T* 50mm F/1.4 ZE / ZF.2 / ZK / ZSA7 - 60.45mE58 2006 ●
Carl Zeiss Ultron 50mm F/1.8A7 - 60.45mB50 1968 ●
Carl Zeiss Planar [HFT] 50mm F/1.8
akaIfbagon 50mm F/1.8
akaOpton Oberkochen Pl HFT 50mm F/1.8
akaRollei-HFT Planar 50mm F/1.8
akaVoigtlander Color-Ultron 50mm F/1.8		A7 - 60.45mE49 1970 ●
Carl Zeiss Tessar 50mm F/2.8A4 - 30.45mB50 1966 ●
Carl Zeiss Jena DDR Pancolar 55mm F/1.4A7 - 50.39mE58 1966 ●
Carl Zeiss Jena DDR Pancolar 50mm F/1.8 "Zebra" [I]A6 - 40.35mE49 1965 ●
Carl Zeiss Jena DDR Pancolar 50mm F/1.8 "Zebra" [II]A6 - 50.35mE49 1967 ●
Carl Zeiss Jena DDR Pancolar 50mm F/1.8 auto / electric MCA6 - 50.35mE49 1976 ●
Carl Zeiss Jena DDR Pancolar 50mm F/2A6 - 40.50mE49 1960 ●
Carl Zeiss Jena DDR Tessar 50mm F/2.8 [T] Type 2S4 - 30.50mE49 1955 ●
Carl Zeiss Jena DDR Tessar 50mm F/2.8 [T] Type 1P4 - 30.50mE49 1954 ●
Carl Zeiss Jena DDR Tessar 50mm F/2.8 Type 4A4 - 30.35mE49 1966 ●
Carl Zeiss Jena DDR Biotar 58mm F/2 T Type 1M6 - 40.90mE40.5 1946 ●
Carl Zeiss Jena DDR Biotar 58mm F/2 T Type 2P6 - 40.50mE49 1950 ●
Carl Zeiss Jena DDR Biotar 58mm F/2 [T] Type 3S6 - 4E49 1953 ●
■Pentax K mount (44)
Chinon Auto 50mm F/1.9
akaAgfa Color 50mm F/1.9 Coated
akaRevuenon Auto 50mm F/1.9		A5 - ?0.45m⌀49 ●
Chinon Auto 50mm F/1.4 [Multi-Coated]
akaAgfa Color 50mm F/1.4 Multi-Coated
akaRevuenon Auto 50mm F/1.4 MC		A7 - 60.45m⌀49 1979 ●
Chinon Auto 50mm F/1.7 [Multi-Coated]
akaAgfa Color 50mm F/1.7 Multi-Coated
akaRevuenon Auto 50mm F/1.7 MC		A? - ?0.45m⌀49 1979 ●
Cima Kogaku AM Topcor 55mm F/1.7 [MC]
akaEdixar 55mm F/1.7 MC
akaExaktar 55mm F/1.7 MC		A6 - 40.60m⌀52 1978 ●
Cosina 55mm F/1.2 MC
akaRevuenon 55mm F/1.2 MC		A7 - 60.60m⌀58 ●
Cosina Voigtlander Nokton 58mm F/1.4 SL IIA7 - 60.45m⌀58 2007 ●
Cosina Cosinon-S 50mm F/1.8
akaPetri 50mm F/1.8		A6 - 50.50m⌀49 1981 ●
Cosina Cosinon-S 50mm F/2
akaCasio 50mm F/2
akaMiranda 50mm F/2
akaPetri 50mm F/2
akaPorst Color Reflex Auto 50mm F/2 MC F
akaSoligor 50mm F/2
akaVivitar Auto 50mm F/2		A6 - 50.50m⌀49 1979 ●
Cosina [Auto] Cosinon-S 50mm F/1.7 MC
akaBauer Neovaron 50mm F/1.7 Multicoated
akaPetri 50mm F/1.7 MC
akaPorst Color Reflex Auto 50mm F/1.7 MC F		A6 - 50.50m⌀49 1978 ●
Cosina [Auto] Cosinon-S 50mm F/1.4 MC
akaBauer Neovaron 50mm F/1.4 Multicoated
akaPetri 50mm F/1.4 MC
akaPorst Color Reflex Auto 50mm F/1.4 MC G
akaVivitar Auto 50mm F/1.4 VMC		A7 - 60.50m⌀49 1978 ●
smc Pentax-M 50mm F/1.7A6 - 50.45m⌀49 1977 ●
smc Pentax-A 50mm F/1.2A7 - 60.45m⌀52 1983 ●
smc Pentax-A 50mm F/1.4A7 - 60.45m⌀49 1983 ●
smc Pentax-A 50mm F/1.7A6 - 50.45m⌀49 1983 ●
smc Pentax-A 50mm F/2A5 - 50.45m⌀49 1985 ●
smc Pentax-M 50mm F/1.4A7 - 60.45m⌀49 1977 ●
smc Pentax-M 50mm F/2A5 - 50.45m⌀49 1979 ●
smc Pentax 50mm F/1.2A7 - 60.45m⌀52 1975 ●
smc Pentax 50mm F/1.4A7 - 60.45m⌀52 1975 ●
smc Pentax 55mm F/1.8A6 - 50.45m⌀52 1975 ●
smc Pentax 55mm F/2A6 - 50.45m⌀52 1976 ●
Ricoh XR Rikenon 50mm F/1.4A7 - 60.45m⌀52 1977 ●
Ricoh XR Rikenon 50mm F/1.7 [I]A6 - 50.45m⌀52 1977 ●
Ricoh XR Rikenon 50mm F/2A6 - 50.45m⌀52 1977 ●
Ricoh XR Rikenon 55mm F/1.2A7 - 60.60m⌀58 ●
Ricoh Riconar 55mm F/2.2A4 - 40.80m⌀52 1978 ●
Ricoh Rikenon 50mm F/2A6 - 50.60m⌀52 1982 ●
Ricoh XR Rikenon 55mm F/2.2A4 - 40.80m⌀52 1980 ●
Ricoh XR Rikenon 50mm F/2 LA6 - 50.60m⌀52 1980 ●
Ricoh XR Rikenon 50mm F/2 SA6 - 50.60m⌀52 1981 ●
Ricoh XR Rikenon 50mm F/1.7 [II]A6 - 50.60m⌀52 1981 ●
Ricoh Rikenon P 55mm F/1.2A7 - 60.60m⌀58 ●
Ricoh Rikenon P 50mm F/1.4A7 - 60.45m⌀52 1985 ●
Ricoh Rikenon P 50mm F/1.7A6 - 50.60m⌀52 1984 ●
Ricoh Rikenon 50mm F/1.7A6 - 50.60m⌀52 1982 ●
Ricoh Rikenon P 50mm F/2A6 - 50.60m⌀52 1984 ●
Helios-77K-4 50mm F/1.8 [MC]
akaГЕЛИОС-77К-4 50mm F/1.8 МС		A6 - 40.45m⌀52 ●
Helios-44K-4 58mm F/2 [MC]
akaГЕЛИОС-44К-4 58mm F/2 МС		A6 - 40.50m⌀52 ●
Volna 50mm F/1.8 MC
akaВОЛНА 50mm F/1.8 МС		A6 - ?0.45m⌀46 1980 ●
Zenitar 50mm F/2 MCA6 - 40.35m⌀46 1995 ●
Zenitar-K 50mm F/1.9 MC
akaЗЕНИТАР-К 50mm F/1.9 МС		A6 - 40.45m⌀52 1991 ●
Vivitar Series 1 55mm F/1.2 VMCA7 - 60.60m⌀58 1984 ●
Porst Color Reflex Auto 55mm F/1.2 MC FA6 - 40.50m⌀55 ●
Carl Zeiss Classic Planar T* 50mm F/1.4 ZE / ZF.2 / ZK / ZSA7 - 60.45mE58 2006 ●
■Interchangeable mount (2)
MS Optics MS-Mode-S 50mm F/1.3 Dualsystem (200 units)M5 - 41.00m⌀49 2006 ●
Tamron 58mm F/1.2 [T]
akaTaika Harigon 58mm F/1.2		P8 - 61.8 ft. 1960 ●

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