Mamiya/Sekor SX Auto 90-230mm F/4.5 [I]

Telephoto zoom lens • Film era • Discontinued

  • Announced:
  • · 1974
  • Production status:
  • ● Discontinued
  • Country of design:
  • · Japan
  • Original name:
  • · AUTO mamiya/sekor ZOOM SX 1:4.5 f=90-230mm
  • Class:
  • · Slow full-frame telephoto zoom lens
  • System:
  • · Mamiya SX M42 (1974)

Model history (2)

■Mamiya/Sekor SX Auto 90-230mm F/4.5 [I]A11 - 81.50m⌀58 1974 ●
■Mamiya/Sekor SX Auto 90-230mm F/4.5 [II]A12 - 92.00m⌀62 ●

Specification

Optical design:
35mm full frame
90mm - 230mm [2.6X zoom ratio]
F/4.5 across the focal length range
11 elements in 8 groups
M42 [45.5mm] (modified)
27° @ 90mm - 10.7° @ 230mm (35mm full frame)
Diaphragm mechanism:
Diaphragm type:
Automatic
Aperture control:
Aperture ring (Manual settings only)
<No data>
Zooming:
Zoom mechanism:
Manual
Zoom control:
Zoom ring
Zoom type:
Rotary
Zooming method:
<No data>
Focusing:
1.50m
<No data>
Focusing modes:
Manual focus only
Manual focus control:
Focusing ring
Physical characteristics:
905g
⌀?×189mm
Accessories:
Screw-type 58mm
Built-in telescopic round
Not available

Sources of data

  • Mamiya DSX 1000 & DSX 500 owners operating manual.
  • Mamiya MSX 1000 & MSX 500 owners operating manual.
  • mamiya/sekor DSX series owners operating manual.
  • mamiya/sekor MSX 500 owners operating manual.
  • Mamiya single-lens reflex cameras, interchangeable lenses and accessories booklet (1975).

From the editor

Mamiya DSX 1000 & DSX 500 owners operating manual, as well as MSX 500 owners operating manual state that the lens construction features 11 elements in 6 groups, the lens has closest focusing distance of 2.5m and weighs 1000g.

The Mamiya single-lens reflex cameras, interchangeable lenses and accessories booklet indicates the closest focusing distance of 8' (which is ~2.44m).

Other telephoto zoom lenses in the Mamiya SX M42 system

■M42 mount (1)
Mamiya/Sekor SX Auto 90-230mm F/4.5 [II]A12 - 92.00m⌀62 ●

Lenses with similar focal length range

■M42 mount (24)
Asahi Super-Multi-Coated Takumar-Zoom 85-210mm F/4.5 [43772] • Push/pullA11 - 103.50m⌀58 1971 ●
Chinar 80-205mm F/4.5 [M.C] Macro • Push/pullA13 - 91.30m⌀52 ●
Chinon 80-250mm F/3.8-4.5 Multi CoatedA13 - 121.50m⌀62 ●
Chinon 85-210mm F/4.5 Multi Coated MacroA12 - 102.00m⌀55 ●
Chinon 85-210mm F/4.5 Multi Coated
akaAuto-Alpa 85-210mm F/4.5 Multi-Coated		A12 - 102.00m⌀55 ●
Enna Munchen Tele-Zoom 85-250mm F/4P12 - 80.60m 1961 ●
Hanimex Auto Tele-Zoom 90-230mm F/4.5A11 - ?2.50m⌀58 ●
Panagor Auto Tele 85-205mm F/3.8 Type 1A13 - 92.00m⌀58 ●
Panagor Auto Tele 85-205mm F/3.8 Type 2A13 - 92.00m⌀58 ●
Komuranon 80-210mm F/4.5 K·M·C • Push/pullA12 - 81.90m⌀62 1975 ●
Sears Auto 90-230mm F/4.5A11 - 81.50m⌀58 ●
Soligor C/D 85-205mm F/3.8 MC Macro (s/n 3xxxxxx) • Push/pullA12 - 92.50m⌀62 1981 ●
Soligor 85-205mm F/3.8 (s/n 3xxxxxx)A12 - ?1.70m⌀62 ●
Soligor 85-205mm F/3.8 Macro (s/n 1xxxxxx)A13 - 92.50m⌀58 ●
Soligor 85-205mm F/3.8 (s/n 7xxxxxx)A? - ?2.50m⌀58 ●
Spiratone 80-205mm F/3.9 PluracoatA12 - 92.00m⌀58 ●
Sun Auto Tele-Zoom 85-210mm F/4.8A13 - 82.50m⌀55 ●
Tamron-F 85-210mm F/4.5A12 - 101.79m⌀55 ●
Tamron Auto 80-250mm F/3.8A14 - 92.00m⌀72 1967 ●
Tokina 90-230mm F/4.5 RMCA12 - 92.00m⌀62 ●
Vivitar Auto 85-205mm F/3.8 Macro / Close Focusing (s/n 22xxxxxx)A13 - 92.00m⌀58 1975 ●
Vivitar Auto [Tele-]Zoom 85-205mm F/3.8 (s/n 22xxxxxx)A13 - 92.00m⌀58 1969 ●
Vivitar Auto Tele Zoom 85-205mm F/3.8 "Bright Band" (s/n 22xxxxxx)A13 - 92.00m⌀58 1968 ●
Vivitar Auto Tele Zoom 85-205mm F/3.8 "Chrome Nose"A13 - 92.00m⌀58 1966 ●
■Interchangeable mount (26)
Hanimex Tele-Zoom 90-230mm F/4.5 [T]P11 - ?2.50m⌀58 ●
Panagor Tele 85-205mm F/3.8 [T]P13 - 92.00m⌀58 ●
Polaris Auto 80-210mm F/3.5 [YS]A17 - 102.00m⌀67 ●
Sankyo Kohki Super-Komura 90-250mm F/4.5 [Unidapter Auto]A13 - ?2.00m⌀67 ●
Komuranon 90-250mm F/4.5 K·M·C [Unidapter Auto]A12 - 92.00m⌀62 1980 ●
Schneider-Kreuznach Tele-Variogon 80-240mm F/4 AutoA14 - 91.80m⌀82 1966 ●
Schneider-Kreuznach Tele-Variogon 80-240mm F/4 PresetP14 - 91.80m⌀82 1963 ●
Soligor Auto Zoom 90-230mm F/4.5 (s/n 1xxxxxxx) [T-4]A11 - 72.50m⌀58 ●
Tamron 80-210mm F/3.8-4 MC CF Tele Macro 03A [Adaptall-2] • Push/pullA12 - 100.90m⌀58 1979 ●
Tamron 80-210mm F/3.8-4 MC CF Tele Macro 103A [Adaptall-2] • Push/pullA13 - 100.90m⌀58 1981 ●
Tamron 80-250mm F/3.8 Z-250 [Adaptall]A? - ?2.00m 1973 ●
Tamron 80-250mm F/3.8-4.5 CZ-825 [Adaptall]A13 - 101.50m⌀62 1976 ●
Tamron 80-250mm F/3.8-4.5 QZ-250M [Adaptall]A13 - 101.50m⌀62 1978 ●
Tamron 85-210mm F/4.5 Z-210 [Adaptall]A12 - 91.79m⌀55 1973 ●
Tamron 85-210mm F/4.5 CZ-210M [Adaptall]A12 - 92.00m⌀55 1976 ●
Tamron 85-210mm F/4.5 QZ-210M [Adaptall]A12 - 92.00m⌀55 1978 ●
Tamron Auto 80-250mm F/3.8 [Adapt-A-Matic]A14 - 92.00m⌀72 1972 ●
Tamron Auto 85-205mm F/3.5 [Adapt-A-Matic]A14 - 122.00m⌀62 1972 ●
Tamron 95-205mm F/5.6 [T] • Push/pullP9 - 72.00m⌀58 1965 ●
Tamron 95-205mm F/6.3 [T] • Push/pull
akaAstronar 95-205mm F/6.3		P7 - 66 ft. 1961 ●
Tamron 95-250mm F/5.6 [T] • Push/pullP9 - 72.50m⌀62 1965 ●
Vivitar Tele Zoom 85-205mm F/3.8 (s/n 22xxxxxx) [T]P13 - 92.00m⌀58 1968 ●
Vivitar Tele Zoom 85-205mm F/3.8 [T]P13 - 92.00m⌀58 1966 ●
Vivitar Auto Tele Zoom 90-230mm F/4.5 (s/n 37xxxxxx) [T-4]A11 - 72.50m⌀58 1969 ●
Vivitar Auto 90-230mm F/4.5 Type 1 (s/n 37xxxxxx) [TX]A11 - 71.50m⌀58 1976 ●
Vivitar Auto 90-230mm F/4.5 Close Focusing Type 2 (s/n 37xxxxxx) [TX]A12 - 92.00m⌀62 1980 ●

Comments (2)

David Call

Can I use a Mamiya / sekor 90/230 4.5 lens on a Nikon camera with a converter ?
What converter should I use ?

Reply

You can use this lens with a dedicated M42 – Nikon F adapter. There are two types of such adapters: (1) without glass, and (2) with glass. The benefit of non-glass adapter is a pristine image quality, however, the lens will loose ability to focus at infinity. As for the adapter with glass, it works like a sort of tele-converter – the lens will focus at infinity but the image quality will suffer due to aberrations resulting from the image magnification performed by the glass. It’s up to you whether to use glass or non-glass adapter. As to be honest Nikon DSLR cameras are not suitable for shooting with any lenses except for those with Nikon F mount (sic!) due to longer flange focal distance of the mount.

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