Originally posted by D1N0 If they were going to license it to Tokina from the start, then it is logical that Tokina also had some say about the optical formula. Hence co-designed. I think this was done to share development costs. It is costly to develop new lenses and Pentax isn't going to sell a whole lot on their own. Tokina can sell them to Canonikon users which their are a whole lot more of than Pentaxians.
We don't know how much of it is Co designed and what is meant as co designed
If they are using Hoya as a optical glass supplier it would be as in any industry to consult with that companies that produces the product and also consult them more so if they are the ones building one of the key components.
Hoya is more than likely going to be the company to supply the lens blanks and the lens formulas for the different properties of those lens blanks, we can also with a degree of certainty believe that Hoya will be grinding and polishing the lenses for both tokina and pentax. With these kind of arrangements Pentax would be heavily consulted with the engineers that are formulating the different lens blanks and again in the final grinding and polishing of the lenses. In everyone of these steps in the production they will be real lying on the skill, knowledge, lens formulas , precision and tolerance's of Hoyas equipment and engineers In the design of the final optical formula. Companies that supply these kinds of services do a lot behind the scene consulting that can greatly influence the final design of the lens.
https://photos.smugmug.com/Temp/Temp/i-zPvftRC/0/9dd891a0/O/d4ea3105e14f42e9...48aa0086a6.jpg
Leaked photo
Here is also another hint to the puzzle the image of the leaked lens motor from an unpublished web page has a geo tag locating it right here
Google Maps
Take a look at what is to the left of that building What does this mean I don't know? All I know is that someone took a image of a webpage that has never seen the light of day until the last few weeks and at that location Zeiss is around the corner.
---------- Post added 08-12-2018 at 11:32 PM ----------
Originally posted by Rondec I believe he is trying to prove that Pentax needed Tokina's help to design this lens.
Much of the time if the company is not building the lens, as in the formula of the glass in the lens blanks to the grinding of the lenses the yes I have a feeling that
Tokina Hoya will have influence in the design.
---------- Post added 08-12-2018 at 11:35 PM ----------
Originally posted by Rondec It feels very much as though people (who don't shoot Pentax) are trying to steal Pentax's glory in what would be an otherwise exceptional lens release.
No just pointing out that this lens is a first between the 2 company's with this kind of similarity that we have never witnessed before