Traditional Culture Encyclopedia - Photography and portraiture - Who are the famous designers in Pentax, and who have jumped ship?
Who are the famous designers in Pentax, and who have jumped ship?
Hirakawa went to Longteng after being resigned by Hoya.
I heard nothing else. Turn a good article for your reference:
Who is the optical design of Pentax DA* lens? (Author Peter Zheng)
Although my interest in Pentax gradually declined, and my equipment selection was also turning to dual track, Pentax equipment in FA lens period still left a deep memory for me. Occasionally, I overheard some nonsense repeatedly, and I couldn't help but make a noise. This is not for the good of Pentax today. Is the optical design of Pentax lens really "from Tokyo" as rumored?
Let's look at some examples of optical design. Please be patient. The following contents contain a lot of information and are worth reading. You may even read that Pentax optical designers have switched to Nikon Optical and are about to complete a top series zoom of Nicole, hehe):
The optical structure of Pentax DA 16-50 originated from JP-2007- 127989 optical design patent, which was applied by Pentax 2005 published by Japan Patent Office in May 2007. You can refer to the information two years ago. Two summers ago, I talked to a photographer in the north about JP-2007- 127989, and also talked about more design patents, including many patents related to AF detection system in the fuselage that Pentax applied for between 1970 and 1979. The patent application of 1975 contains the design method of the secondary mirror and sensor at the bottom of the small fuselage, which was first developed at that time. The optical path mode of this autofocus system has been used by other manufacturers since 1982, although after 1984, the phase detection technology of other companies has been updated to replace the contrast autofocus detection mode of the scanning camera with completely independent intellectual property rights of Pentax. The core technology of phase difference ranging began with the development of American military technology.
Although Pentax in the 2 1 century was reduced from a famous SLR camera manufacturer in the 1980s to being forcibly acquired, in the 2 1 century, Pentax carried out optical development of various lenses and registered a large number of related optical design patents. Pentax began to apply for the optical design patent of DA 1 1.06-50/F2.8 in June 2005, and completed the experimental model of optical design before June1/.05. This 19 page patent specification shows that the original development design of DA 16-50 * * has three groups (the design types of lenses are 15, 16 and 18 respectively) and six specific experimental models of lens optical design. Some specific data of six optical designs are given in the patent specification. JP-2007- 127989 Patent inventor: Xiao Zhi Yahe (now one of the main optical designers of Pentax), and patent applicant: Pentax. In the end, only one optical design was selected by Pentax for production and listing, which was the choice after comprehensive factors such as cost and market price, instead of giving priority to lens imaging in the FA28-70/f2.8 era (Pentax in the FA* lens era was still in the heyday of its enterprise status). From the perspective of other manufacturers, not every optical manufacturer will carry out six design experiments on a product development project, and it is more common for other companies to carry out two or three design experiments on a product. However, the method of six experimental models will easily expand the scope of the same patent.
Another example is:
Pentax Da 10- 17/F3.5-4.5 Fisheye, Japanese Patent Office PublicationNo. JP-2007-9437 1, inventor: Hirakawa Chun (one of Pentax's major optical designers, who is about to retire), patent applicant: Pentax, filing date: 2007.
Pentax DA 50- 135/f2.8, Japanese Patent Office PublicationNo. JP-2007-2 12830, inventor: Xiao Zhi Yahe (now one of the main optical designers of Pentax), patent applicant: Pentax, filing date: February 2006 10.
Pentax DA 35/f2.8 Macro, Japanese Patent Office publication number JP-2008-257088, inventor: Koji Kato (Pentax is one of the major optical designers at present), patent applicant: Hoya, and the filing date is April 9, 2007.
Da 35mm F2.8macrolens. Now this product comes from JP-2008-257088 optical design patent. This is a macro lens with equal magnification. On May 29th, 2007, another application was submitted, and then in 2008, the Japanese Patent Office published the patent document JP-2008-298840. The applicant is Hoya, and the inventor column is also marked as "No.9, No.2, Tomoko, Maenomachi, banqiao area, Tokyo/Pentax Co., Ltd.", but the inventor is another one: Jin Zhikang Xiong, one of Pentax optical designers, DA6544. Two 35mm macro patents show that each has six experimental models of lens design, all of which are aimed at 35mm f2.8 macro, but JP-2008-298840 is aimed at 35mm f2.8 1.5 magnification macro lens, and JP-2008-298840 has not yet been put into production.
In addition to the earlier macro lens optical design, Pentax had 27 patents and 3 new practical cases related to macro lens optical design and lens macro technology from 5 years after the completion of the project to 2004, including:
PatentNo. JP-200/KOOC-0/-2/KOOC-0/798, inventor: Takashi Izumi (one of the original optical designers of Pentax), patent applicant: Pentax, filing date:/KOOC-0/July 2, 999.
PatentNo. JP-Hei11-23121,inventor: Takayuki Ito (one of Pentax optical designers), patent applicant: Pentax, filing date:19986544.
PatentNo. JP-Hei11-231210, inventor: Takayuki Ito (one of Pentax optical designers), patent applicant: Pentax, filing date:199865438+February 2.
(Launched on 200 1, the famous high-end macro lens FA*200mm f4 Macro [IF] is the last masterpiece of Quan Long during his tenure in Pentax, and FA35/f2 AL and FA20-35/f4 are also responsible for optical research and development. After Quan Long became famous, he transferred to Nikon Optics, and successively served as the optical design of high-end lenses such as Nikkor 17-55 f2.8G, Nikkor 105mm F2.8G VR Micro, Nikkor 24mm F3.5ED, and now he is the second design course manager of the second design department of Nikon Optical Image Development Headquarters).
Pentax DAF 50/f2.8 macro, now the mechanical design and manufacturing technology is different from the past, but the optical design method of this lens comes from the patent JP-Ping/KOOC-0/-2/KOOC-0/48/KOOC-0/2 (Pentax f50mm2.8macro), and the inventor is Matsuo Bowen (one of Pentax optical designers). The design method of FA 50mm f2.8 macroscopic optical path also comes from JP-Ping1-214812 patent.
There are two Pentax DFA macro series, but Tokina has no 50mm f2.8 macro product. Pentax, Nikon and Tenglong each have a number of macro lens optical design patents, Canon and Sigma also have some macro lens optical design patents, while Tokina does not have its own macro lens optical design patents, and the access time is from Heisei 5 years to August 2009. As an enterprise, there will be cross-licensing of certain patents, such as Pentax and Nikon, but you need to have your own patent technology capital to exchange.
There are more, please go to the Japan Patent Office for reference. Even if we look up the 2 1 century lens optical design patents, we can still see a large number of Pentax optical design patents. According to the approved patent documents published by Japan Patent Office, Pentax applied for more than 1000 patents related to optical design and lens technology from 2002 to 2006. Pentax also published some patent documents on optical design of camera lens, but he did not list the corresponding products himself.
Tokina only authorized the use of the optical design provided by Pentax according to the cooperation agreement with Pentax, and the mechanical structure design was carried out independently. Tokina also keeps some remaining factories produced in Japan. This reminds people that part of Samsung's Schneider D-xenon lens is made in Vietnam (bottom mark). Which lens factory is there in Vietnam?
In fact, after 2000, we can't see Tokina's lens optical design patent or Kenko's lens optical design patent, but we can find a few patents such as filter frame (Kenko is an independent legal person enterprise). Even before 2000, Tokina's own optical design patents were pitiful. This can explain why Tokina is willing to cooperate with Pentax after being acquired by Kenko in recent years, and agrees not to use the optical design provided by Pentax to produce KAF bayonet lenses. This harsh condition is almost invisible to other major lens manufacturers.
Tokina lenses have relatively reliable mechanical quality (compared with the products of a Japanese lens factory), but Tokina lacks the ability of optical design research and development, and the scale of the enterprise is also very small. However, even Tamron, an independent lens factory with good products and management, has obviously fewer patents on lens optical design than Pentax, which is a big difference between Japanese independent lens factory and several established camera optical factories, and the research and development conditions are also different. Independent lens factory is more willing to buy optical patent technology authorization.
From Heisei 5 years to 2008, the number of Pentax's optical design and lens technology patents (the filing date is up to the end of 2006): 3,368 patents and 184 new practical cases, which have not been included in the Pentax patent project with Hoya as the applicant since 2007. (Hoya is the applicant in the Pentax approved patent published by Japan Patent Office, which is different from before.
From Heisei 5 years to July 2009, the number of patents of optical design and lens technology of Tenglong: 258 patents, 4 practical new cases;
From Heisei 5 years to July 2009, the number of patents of Sigma optical design and lens technology: 2 15 patents and 9 new practical cases;
From Heisei 5 years to July 2009, the number of Kenko's patents: 3 patents and 8 utility models (note: 1 1 all related to photographic accessories);
From Heisei 5 years to July 2009, the number of patents in Tokina is 1 patent, and there are 0 new practical cases (note: 1 item is only related to the polarizer assembly method);
(Heisei 5 years = 1993). During the period of 1976-199 1, there were less than 60 patents in Tokina, and only 29 patents related to lenses, some of which were co-holders and inventors of patents from companies such as Chinon (just like some of Sony's patents related to lenses were co-holders with Tamron's * * *).
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