Journal of The Society of Photographic Science and Technology of Japan
Online ISSN : 1884-5932
Print ISSN : 0369-5662
ISSN-L : 0369-5662
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Volume 74, Issue 2
Displaying 1-6 of 6 articles from this issue
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Special Topics: For Fineness of Photograph
Special Topics: Innovative Camera Technology in 2010
  • Development of Compact Lenses for Micro Four-Thirds System
    Tamotsu Koiwai, Hidenori Akita
    2011 Volume 74 Issue 2 Pages 56-62
    Published: 2011
    Released on J-STAGE: May 25, 2012
    DOIhttps://doi.org/10.11454/photogrst.74.56
    JOURNAL FREE ACCESS
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    In 2010, "The micro SLR Olympus PEN" of Micro Four Thirds standard won double titles of CAMERA GRAND PRIX .The characteristics of Olympus PEN series are high-quality, compact, lightweight, no feeling of burden/stress and easy to take both still images and movies by SLR quality. Especially, the consciousness of compact and lightweight is taken into the series’ entire system including the body and interchangeable lenses. We have developed the interchangeable lenses by aiming ultimate miniaturization for optical and lens-barrel design along with making the miniaturizing compliance of Micro Four Thirds standard useful. In order to create compact and lightweight interchangeable lenses, a number of technical difficulties, such as realization of thinner design by adapting lens-barrel retraction system, lens-barrel with a high degree of accuracy, quick and silent AF, adaptation of special lenses, thorough trimming of weight, had to be overcome in the developmental process. Here we refer to these miniaturization technologies.
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  • PENTAX 645D Medium-Format Digital SLR Camera
    Yasuyuki Maekawa
    2011 Volume 74 Issue 2 Pages 63-68
    Published: 2011
    Released on J-STAGE: May 25, 2012
    DOIhttps://doi.org/10.11454/photogrst.74.63
    JOURNAL FREE ACCESS
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    PENTAX 645D has been developped with the aim to offer a relatively affordable, yet highly operable and durable Digital SLR camera equipped with larger sensor, to nonprofessional, yet highly-enthusiastic photographers, whereas precedent cameras with similar format had been a tool of a professional photographer, both in terms of its extraordinary pricing and the extent of knowledge required for the handling of it. The focus of this article is to detail the unique feature of the Medium-Format Digital SLR camera, a product composed of the latest functionality and thought-out user interface developed in the eingeneering of standard APS-C Digital SLR, as well as the extensive knowledge of larger format cameras accumulated through the development of the film Medium-Format SLR.
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  • Phase Detection AF Using Dedicated Pixel Built-in Image Sensor
    Hiroshi Endo
    2011 Volume 74 Issue 2 Pages 69-71
    Published: 2011
    Released on J-STAGE: May 25, 2012
    DOIhttps://doi.org/10.11454/photogrst.74.69
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    Compact cameras adopt Contrast AF, which takes long time to find the in-focus position. To solve it, we developed the Phase detection AF. It introduces this new technology.
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  • Optical Design of the High-Power Zoom Lens
    Daisuke Ito
    2011 Volume 74 Issue 2 Pages 72-76
    Published: 2011
    Released on J-STAGE: May 25, 2012
    DOIhttps://doi.org/10.11454/photogrst.74.72
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    We have developed a high-power zoom lens for PowerShot SX30IS, which is the Canon compact digital camera with 35 × zoom ratio lens (f=4.3-150.5/F2.7-5.8). This taking lens attains a compact size by PNPNP zoom type. And the taking lens attains the high resolution by a material of "Hi Index Ultra Low Dispersion", which we call "Hi-UD lens".
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Original paper
  • Development of Curriculum of Learning through Photograph
    Keiko Suzuki, Naokazu Aoki, Hiroyuki Kobayashi
    2011 Volume 74 Issue 2 Pages 77-91
    Published: 2011
    Released on J-STAGE: May 25, 2012
    DOIhttps://doi.org/10.11454/photogrst.74.77
    JOURNAL FREE ACCESS
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    A curriculum of an integrated learning using power of photography in the junior highschool was constructed, and was experimented in the class "Seminar for Photographic Expression" of the integrated learning at a junior high school. The center of the curriculum is viewing photographs and self-expression using photography. By comparing the results of questionnaires investigation between before and after the class it is suggested that the curriculum brings about increase in self-esteem, empathy, and motivation for learning. This educational effect is really to foster ability to live self-sufficient lives. On the basis of these results curriculums which can be conducted by anyone at every junior highschool were proposed.
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