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Kamerastore Digital Database

Mamiya 18cm f4.5 Sekor - Lens

Mamiya 18cm f4.5 Sekor - Lens

Fixed focus telephoto lens made for C series 120 TLRs by Mamiya. It gives the equivalent field of view to a 100mm lens on full frame/35mm. This is the oldest version of the 180mm telephoto for C cameras. Focus is handled by the body. Metal body available in black.

  • Mamiya-Sekor 18cm f4.5 (5 elements, 4 groups)
  • Shutter: Seiko or Seikosha-S leaf, 1s - 1/500s + B
  • Size: 115 x 92 x 60 mm
  • Weight: 648g
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Twin-Lens Reflex (TLR) cameras are defined by having two lenses. One lens is used for taking images and the other is for viewing, focusing, and framing your photos. The lenses are synchronized and the same focal length to allow for proper framing and focusing.

Normally, the viewing lens redirects light upwards towards a waist level viewfinder and the lower lens exposes the film using a built-in leaf shutter. Because of the way this system works the image in the viewfinder is flipped horizontally, which can take some time to get used to. There are also slight differences in framing between the two lenses that can affect images at close focusing distances.

Most TLRs take 6x6cm images on 120 medium format roll film, although some could also use now-discontinued 220 film. Many companies made TLRs, including Yashica, Minolta, and Zeiss Ikon. The most famous TLR brand, though, is Rollei.

The Rolleicord and Rolleiflex cameras are the definitive TLR designs, with all others taking major inspiration from them. These cameras pair world-class build quality with legendary Carl Zeiss & Schneider-Kreuznach lenses to make an excellent, if expensive, camera.

TLRs are iconic ”old school” cameras, used as the primary camera of journalists and documentary photographers for decades before 35mm SLRs took over. Most people will recognize a TLR as an ”old camera” and many will be intrigued by its strange (by today’s standards) two-lens design.

DHW Fototechnik is still making Rolleiflex TLRs today in Germany.

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Mamiya 18cm f4.5 Sekor - Lens Availability & Price History
Date Sold SKU Quality Control Price Image
Available T67941 €199,00 Mamiya 18cm f4.5 Sekor
27 May 2024 T67422 € 65,00 Mamiya 18cm f4.5 Sekor - Lens Image
22 Apr 2024 T67426 € 75,00 Mamiya 18cm f4.5 Sekor - Lens Image