[Kunzite]

Did you see the patent request concerning the HD Pentax-D FA★ 50mm f/1.4 SDM AW and do you know its reference?

The one concerning the HD Pentax-DA★ 11-18mm f/2.8 ED DC AW is P2018-97053A (Japan), published on 21st June 2018.

This patent might be related to the D FA* 50mm f/1.4:
??2018-22008 | ???????IP Force?

The pressing piece is the clue (together with mentioning heavy elements).

[clickclick]

Thinking of the concerns regarding the ability to develop a new 70-200/4 while juggling other lens development, and how could it appear so fast, I wonder if this lens is based off the 70-200/2.8, and really doesn't need that much R&D to make it happen? Regarding the licensing of the DFA* 50 by Tokina for the Opera series, I see it's not yet available at B&H. Has there been a release date? Did the redesign of the barrel for the DFA* 50 by/for Pentax result in a delay and redesign of the Tokina as well? Or are we all just throwing out SWAGs?

[Mikesul]

I realize that the cases are probably very dissimilar but I wonder how frequently they issued lenses and cameras in the glory days of the 60s-70s.

[Mistral75]

HD PENTAX-D FA ? 50mm f/1.4 SDM AW lens additional info (sharper than the Sigma Art version) | Pentax Rumors

Everything of this lens is developed and patented by Pentax and Pentax produced
Pentax DFA* 50mm F1.4 looks similar to Tokina 50mm F1.4: Pentax SLR Talk Forum: Digital Photography Review
The Tokina is made by Tokina but uses the Pentax patent and different coatings


DFA* 50/1.4 new test photos: Pentax SLR Talk Forum: Digital Photography Review
According to this: http://www.kennychi.com/lens-pentax-dfa-★-50mm-f1-4-sdm-aw-評測/?from=groupmes...appinstalled=0

The patent belongs to Pentax, and Tokina will be licensing it, producing it on their own and using their own coatings.

There is one single source behind the links you were kind enough to provide and this source is asahi man.

• Pentax Rumors explicitly quote the name of asahi man and provide their source: two messages posted by asahi man in the 'Pentax DSLR' forum at Digital Photography Review.
• You then give the URL of the first of these two messages.
• The Digital Photography Review thread linked in your message is dedicated to the review published a bit early by Kenny Chi and subsequently taken down.
• The quoted paragraph from Kenny Chi's article is a quasi verbatim of asahi man's messages. The header of this paragraph (其他國外網站得到資訊如下：) can be translated as follows: 'Foreign websites got information as follows:'

As much as I appreciate asahi man and his contributions here and at Digital Photography Review, I am afraid that no piece of information reported by him can be placed on the same level as the publication of a patent request.

[D1N0]

Useless bickering. I don't know why this would not be a Pentax design. If it is a Tokina design there must be a Tokina paten huh... You are spreading FUD Mistral

[x4rd]

If it is a Tokina design there must be a Tokina paten huh

You can't design something that had been patented before anyways

[stillshot2]

I realize that the cases are probably very dissimilar but I wonder how frequently they issued lenses and cameras in the glory days of the 60s-70s.

I wonder this too. Is there anyone that can fill us in about how things were back then?

[Mikesul]

I wonder this too. Is there anyone that can fill us in about how things were back then?

Well I was there but I was a student, young husband and father so I didn't pay much attention to the photography market. I had used Yashica rangefinder through most of the 60s and 70s until I picked up the MX in 77/78. No internet so no constant chatter about the next big thing.

[Mistral75]

This patent might be related to the D FA* 50mm f/1.4:
??2018-22008 | ???????IP Force?

The pressing piece is the clue (together with mentioning heavy elements).

I'm not so sure. This patent request seems to be about the tilt adjustment of certain lens elements in a duocam zoom lens. The zoom ring is specifically mentioned in the patent description and claims.

[Mistral75]

Useless bickering. I don't know why this would not be a Pentax design. If it is a Tokina design there must be a Tokina paten huh... You are spreading FUD Mistral

This seems to be the ultimate argument of those who have few left.

Please don't put statements in other people's mouth, which they have never made, so as to more easily contradict them. Even if this is a common figure of rhetoric it's a bit unpleasant.

I'm not pretending, never have been, that the optical formula of the HD Pentax-D FA★ 50mm f/1.4 SDM AW was not designed by Ricoh Imaging. I'm definitely thinking it was since, as I wrote before, I have great confidence in asahi man's statements.

I'm just making the point that the corresponding patent is yet to be found (most probably because the patent request hasn't been published yet).

My initial question to ogl was devoid of any malice: I was sincerely hoping he had found a trace of the patent on some Russian forum.

[D1N0]

Could have fooled me.

[Kunzite]

I'm not so sure. This patent request seems to be about the tilt adjustment of certain lens elements in a duocam zoom lens. The zoom ring is specifically mentioned in the patent description and claims.

Hmm... the ipforce site doesn't show the images for me.
The pressing piece sounded similar to something they described on the Development Story site.

[Mistral75]

Try J-PlatPat instead.

[Larrymc]

I'm not so sure. This patent request seems to be about the tilt adjustment of certain lens elements in a duocam zoom lens. The zoom ring is specifically mentioned in the patent description and claims.

That drawing looks quite like the 55-300 PLM. That drawing is the the 55-300 PLM not any other lens.

[Kunzite]

Indeed.

OTOH not long ago I've seen a patent published, that corresponds to the K-S1's thumb grip. Which means a patent can be published quite some time after the product makes it on the market.
I'm not sure, but I suppose a lens doesn't necessarily need a patent for its optical design.