Cine lens

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Arri- Cine Lenses

Cine , Ciné or Cinema lenses are optical systems that are designed for the needs of cinematography . The requirements for lenses in professional film technology are different compared to lenses for photography.

Film camera with cine lens. The support system with the focus pulling device is clearly visible .
Cine lens Samyang 12 mm cine T2.2 NCS CS for APS-C - and MFT - bayonet connections . The ring gears for the aperture and focus ring and the indication of the aperture levels in transmission values ​​(T) are easy to see.

The standardized gear rings in module 0.8 on the focusing ring , aperture setting ring and - if available - zoom setting ring are particularly striking . These ring gears allow the equipment to be mounted on a support system in which the focus , aperture and, if necessary, the focal length can be adjusted smoothly and smoothly using gears . The distance setting by means of the focusing ring takes place over a large angular range and can be fine-tuned by turning the ring or, if a support system is used, by means of a focus puller . The aperture setting ring does not lock into place, but allows the aperture to be adjusted continuously. In order to enable a quick lens change, there is a requirement for identical positions for these setting wheels as well as for uniform external dimensions across a certain portfolio of lenses. The largest lens in such a group is therefore decisive for the design.

In contrast to photographic lenses, in which the f-stops are specified in purely arithmetic “ f ” values ​​(ratio of the entrance pupil to the focal length), for cine lenses these are specified as transmission values ​​“T” (or “ t ”). In contrast to the “ f ” values, the latter value takes into account the light losses through the lenses . The potential loss of light plays a greater role the more lens components are built into a lens; Anti-reflective coatings ("remuneration") can in turn counteract this. The requirement from film technology to take transmission into account is based on the fact that the exposure time is predetermined by the image frequency . With the same T values, the same amount of light always falls on the image plane under the same lighting conditions and the same exposure time .

Some cine lenses are designed as anamorphic lenses . Such lenses produce distorted images. Usually the longer side of the picture is compressed in a specified ratio. When looking at it, it is rectified accordingly.

A standard bayonet for cine lenses is the Arri-PL lens connection .

High optical performance and weather resistance are a matter of course in cinematography. The effect of focus breathing is minimized by appropriate construction. Cine lenses are usually expensive.

Well-known manufacturers of cine lenses are Angénieux , Arri , Carl Zeiss , Cooke Optics, Fujifilm , Leitz , Samyang Canon and Schneider Kreuznach . Cine lenses are increasingly being offered by photo manufacturers such as Sigma or Tokina .

literature

  • David Stump: Capturing the Shot: Fundamentals, Tools, Techniques, and Workflows for Digital Cinematography , Focal Press, 2013, ISBN 978-0-2408-1791-0
  • Kris Malkiewicz, M. David Mullen: Cinematography , Third Edition, Touchstone, 2005, ISBN 978-0-7432-6438-9

See also

Individual evidence

  1. ↑ Sareesh Sudhakaran: What is a Cine Lens and Why must it be Different from a Photo Lens? , wolfcrow.com, April 4, 2014, accessed November 9, 2019
  2. ↑ Michael J. Hussmann: Cine lenses - what are they, who needs them? , DOCMAtische Gesellschaft Verlags GmbH, March 1, 2017, accessed on November 9, 2019
  3. ↑ Canon Cinema Sumire Fixed Focal Lengths. Accessed January 2, 2020
  4. ↑ Lars Theiss: Sigma announces cine lenses - connections for Canon, Sony and PL , fotoMagazin, September 7, 2016, accessed on November 9, 2019
  5. ↑ Markus Zitt: Trend: growing range of Ciné lenses , fotointern.ch, January 2, 2017, accessed on November 17, 2019

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