Study of Zooming Measurement Method and Analysis of Zooming Work while Shooting Still Subject by Broadcasting Cameramen - Shimoda, Shigeru; Tsuda, Takao; Ishikawa, Akio; Kato, Daiichiro; Yamada, Mitsuho; Abe, Kazuo; Fukushima, Hiroshi (Eizō Jōhō Media Gakkaishi, 1999)