New 75mm Hypergon Lens

[J. Patric Dahlen]

If the original Hypergon had a D.R.P. patent (Deutsche Reichs Patent) , then it is in the public domain, because all german pre 1945 patents was voided after 1945.

Yes, and the patent itself propably expired already in the 1930s, so anyone can copy the design. But the question is if the tradename is still owned by Zeiss or Schneider or if it has expired.

[J. Patric Dahlen]

Should be schneider. They've produced some Artar and Dagor with multicoating in modern shutter.

Yes, it could be Schneider if they took over the Hypergon name as well, or maybe it's still Zeiss that owns particular name. It would be a good idea to ask their historical departments. Maybe they would accept a name like "Hypergon Neu nach C. P. Goerz Patent" or something like that. German sounds always better. Then a new range of serial numbers.

[Per Madsen]

Yes, it could be Schneider if they took over the Hypergon name as well, or maybe it's still Zeiss that owns particular name. It would be a good idea to ask their historical departments. Maybe they would accept a name like "Hypergon Neu nach C. P. Goerz Patent" or something like that. German sounds always better. Then a new range of serial numbers.

"Hypergon Neubau nach C. P. Goerz Original D.R.P. Patent" sounds even better

[Havoc]

"Hypergon Neubau nach C. P. Goerz Original D.R.P. Patent" sounds even better

Going to need a lot od space to put all that!

[J. Patric Dahlen]

"Hypergon Neubau nach C. P. Goerz Original D.R.P. Patent" sounds even better

It's too long and "D.R.P." is redundant as it stands for patent. The design was probably patented in many countries, so 'Patent' is enough.

"Hypergon Neu nach C. P. Goerz Patent" would say in simple terms that it is a new Hypergon based on the C. P. Goerz patent (And would include all of the patents, as it could have been patented in the US, UK and France).

When Franke & Heidecke made a simpler Rolleiflex to be priced between the Rolleiflex Automat and the Rolleicord, they called it "Standard Neu". "Standard" after the older Rolleiflex model, and "Neu" to distinguish it from the old one.

[rayfor]

Update 2023-08-18

The filter mount is redesigned with ball bearing. And I found a manufactruer of silicon mask for these perfect aperature.

And the next phase is PVT. So we will see the final product very soon.

Attachment 241605
It seems the attachment amount has match the limit. Maybe a new thread is needed? I put these updates onto youtube

[mamaluke]

Do update us when it is available for purchase.

[rayfor]

Do update us when it is available for purchase.

I've just received all the parts, will be ready very soon.

[Laurent Laval]

hello, is it available for purchase ? i'm interested as well !! Amazing job

[rayfor]

hello, is it available for purchase ? i'm interested as well !! Amazing job

Lenses are ready, I will put them onto my friend's website. Should be available this week or next.