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Proceedings Paper

Design of a rear anamorphic attachment for digital cinematography
Author(s): A. Cifuentes; A. Valles
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Paper Abstract

Digital taking systems for HDTV and now for the film industry present a particularly challenging design problem for rear adapters in general. The thick 3-channel prism block in the camera provides an important challenge in the design. In this paper the design of a 1.33x rear anamorphic attachment is presented. The new design departs significantly from the traditional Bravais condition due to the thick dichroic prism block. Design strategies for non-rotationally symmetric systems and fields of view are discussed. Anamorphic images intrinsically have a lower contrast and less resolution than their rotationally symmetric counterparts, therefore proper image evaluation must be considered. The interpretation of the traditional image quality methods applied to anamorphic images is also discussed in relation to the design process. The final design has a total track less than 50 mm, maintaining the telecentricity of the digital prime lens and taking full advantage of the f/1.4 prism block.

Paper Details

Date Published: 27 September 2008
PDF: 9 pages
Proc. SPIE 7100, Optical Design and Engineering III, 71000Q (27 September 2008); doi: 10.1117/12.797529
Show Author Affiliations
A. Cifuentes, Servicevision Bis, S.L. (Spain)
A. Valles, Servicevision Bis, S.L. (Spain)

Published in SPIE Proceedings Vol. 7100:
Optical Design and Engineering III
Laurent Mazuray; Jean-Luc Tissot; Jeffrey M. Raynor; Rolf Wartmann; Andrew Wood, Editor(s)

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