Design of telephoto zoom lens with built-in teleconverter for digital still cameras

Masashi Yamashita

doi:10.1117/12.2529043

9 September 2019 Design of telephoto zoom lens with built-in teleconverter for digital still cameras

Masashi Yamashita

Proceedings Volume 11106, Zoom Lenses VI; 111060E (2019) https://doi.org/10.1117/12.2529043
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

Abstract

This paper introduces a design of telephoto zoom lens with the built-in teleconverter, focusing on the AF-S NIKKOR 180-400mm f/4E TC1.4 FL ED VR. In recent years, professional photographers are demanding more convenience and higher image quality. For these needs, we developed the AF-S NIKKOR 180-400mm f/4E TC1.4 FL ED VR telephoto zoom lens, by improving its usability and optical performance compared to the previous model. Especially in terms of optics, we 1) expanded the focal length of the wide-angle end from 200mm to 180mm, 2) integrated 1.4x teleconverter, 3) designed it in consideration of its usability (e.g. weight, torque of zoom or focusing ring, diameter of lens barrel) . The above features have achieved by using 4-group zoom type design consisting of PNPP (positive, negative, positive and positive), and separating the focus part from the zoom part.

It will further explain how we have simultaneously realized high optical performance and usability, especially focusing on optimized optical power distribution, lens configuration, glass material combination and layout of functional lens groups (e.g. image stabilization, the built-in teleconverter).

Citation Download Citation

Masashi Yamashita "Design of telephoto zoom lens with built-in teleconverter for digital still cameras", Proc. SPIE 11106, Zoom Lenses VI, 111060E (9 September 2019); https://doi.org/10.1117/12.2529043

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KEYWORDS

Zoom lenses

Photography

Glasses

Chromatic aberrations

Lens design

Optics manufacturing

Cameras

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