Mr. Jun Hirakawa is a Japanese lens designer best known for creating the Pentax FA 43mm Limited and FA 77mm Limited lenses during his time at Pentax. Hirakawa said at the time that he regretted his "early retirement" from Pentax in 2010, around the time that

Hoya Hoya may refer to: Places *Hoya, Germany, a city in Lower Saxony, Germany *County of Hoya, a former state in present Germany * Hoya, Tokyo, now incorporated within Nishi-tokyo, Tokyo, Japan * Hoya, Hpruso, a place in Hpruso Township, Kayah, Myanma ...

acquired the company, and was subsequently hired by Tamron.

List of credited lens designs

Hirakawa is credited with designing: * DA 10-17mm f/3.5-4.5 Fisheye (co-developed with

Takayuki Ito is a Japanese computer scientist who specialized in the fields of artificial intelligence and multi-agent systems. He worked as assistant professor in the computer science department of Japan Advanced Institute of Science and Technology from 20 ...

) * DA 14mm f/2.8 * DA 40mm f/2.8 Limited (based on the smc PENTAX-M 1:2.8 40mm) * DA 50-200 f/4-5.6 * DA 55-300 f/4-5.8 * DA* 55mm f/1.4 * F 17-28mm f/3.5-4.5 Fisheye * F 35-80mm f/4-5.6 * F* 600mm f/4 * FA 28-105mm f/4-5.6 * FA 28mm f/2.8 AL * FA 28mm f/2.8 SOFT * FA 35mm f/2 * FA 43mm Limited * FA 70-200mm f/4-5.6 * FA 77mm Limitedhttp://gw.org.za/images/Lens%20Technical%20and%20Trial%20Use%20Reports.%20SMC%20Pentax%20FA77mm%20and%20FA43mm.%20Hirakawa%20Jun%20and%20Adachi%20Masamitsu,%202000.pdf (based on the smc PENTAX-A* 1:1.4 85mm) * FA* 24mm f/2 * FA* 80-200mm f/2.8 * FA* 85mm f/1.4 * FA* 600mm f/4 * Tamron SP 24-70mm f/2.8 (2011) * Unreleased 31mm f/2.4 prototype for the FA Limited series * Unreleased wide-angle (80mm on 6x7 or 65mm on 645) f/2.8 (1986) * Unreleased 70-300mm f/4-5.8 (1987) * Unreleased 100-400mm f/5.6 (1992, with Koichi Maruyama) * Unreleased 400mm f/4.5 (1988)

References

External links

* * *
Hirakawa Jun
on Camera-wiki.org

on patentgenius.com Optical engineers Pentax people Japanese industrial designers Living people Year of birth missing (living people) {{Japan-engineer-stub