Originally posted by Rondec I saw that you posted something similar on DP Review. For some reason or other everyone's assumption is that Pentax couldn't possibly come up with a lens on its own and they must have had some help to even have something even passable.
Never had I said that pentax could not come up with a lens of its own, However I have said that they might have jointly went into developing the lens and jointly sharing the cost of the lenses development together thru the use of share the design and this can include the lens barrel and all of its moving parts, the lens motor, and even how the elements are fastened to the lens who knows. If we look back at the previous partner ship the lenses are altogether different looking beasts right down to the lens barrel designs, the only time that we can tell they are of the same optical design is via them tell us or looking at the patients.
If we look at the lens hood
I am just pointing out that this is much more than a simple optical design swap and that probably most of the internal components are being supplied by the same manufactures to both tokina and pentax as a way of spreading the cost. Also tokina prides itself on manufacturing their own lens bodies and barrels so they are probably are the suppliers of that component. Most of the time tokinas lens bodies are over built when compared to other manufactures
Originally posted by Rondec If Tokina is using the same motor as Pentax, the assumption has to be made that Pentax gave them a lens design in more detail than in the past and included recommendations for the lens motor, including the name of the supplier of said motor.
The 70-200 F4 has been out and in product well before pentax has hinted of the 50 being designed I have a feeling that it was the other way around.
Originally posted by Rondec Frankly, I am irked that Pentax designs and produces an excellent lens, releases it months before Tokina does so and people come out of the wood work to say that it is designed, at least partially, by Tokina. People, who I may add, have absolutely no information at all, but only a large amount of speculation based on staring at photos and diagrams of lenses and then adding up two and two and coming up with a Tokina designed lens.
Your irked at the idea that pentax welcomes the idea that they may have decided to share some of the production, outsourcing supplies like lens motors, the lens substructures,the iris , lens blanks from Hoya (a parent company with tokina and kenko) and the . If I think pentax had done all of this on their own outsourcing supplies like lens blanks that the cost would be more inline with what other companies offering in this caliber of lens.
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Originally posted by northcoastgreg Actually we do. Ricoh has published a fairly detailed article about the design of the DFA* 50. Pentax regards the lens as an exemplification of their imaging philosophy.
I always take this with a grain of salt if I was to believe every manufactures claims out there I would have to believe that the sensor found in the D850 was designed by Nikon, have a look at there staged interview inside their labs if you don't believe me, That is of course if we ignore the Sony's part number found on the sensor.