Asahi Optical Co. Super-Multi-Coated Takumar 15mm f/3.5-22.0

Lens categoryUltra-wide
Vendor nameAsahi Optical Co.
Type nameSuper-Multi-Coated Takumar
Product year1974
Focal min (mm)15
Focal max (mm)15
Focus min (cm)0.3
Aperture max3.5
Aperture min22
Element(s)13
Diaphragm blades6
Asahi Optical Co. Super-Multi-Coated Takumar 15mm f/3.5-22.0

This is the widest M42 lens known to exist and only a very limited quantity was manufactured before Pentax switch to the K mount version. It is known that the very early example ( about 500 of them according to recent material and research done by the Japanese Hobbyist ) use hand grounded Aspherical elements while the engineer perfecting the optical design

Uses built-in filters like the 17mm Asahi Fisheyes .

1 Comment(s). Add a comment or Trackback

  • Bob Rapp  07:31 May 09, 2005 

    There were two optical versions of this lens in both the M42 and K mount. The early version has the Aspherical element and the later did not. In removing the Aspherical element, other lens elements changed and can be determined by the front element retaing ring. I do not know what the measurements are by my sample SN8013862 is the early version.
    Also, this lens was designed in partnership with Zeiss and they had a similar lens in the Contax mount. Primary difference was they used a floating element rather than Aspherics.

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