Viltrox Stops Selling Canon Lenses

[Tronhard]

I was interested to see A POST in DPREVIEW to the effect that Canon had told Viltrox to stop selling Canon RF mount lenses.   I went to the lens company's website HERE  and there is no listing for Canon RF lenses and, in fact, none for the EF-M mount either.

This information might be useful if someone asks about Viltrox lenses on Canon bodies, as it seems they have stopped producing product.

[ebiggs1]

Then it goes to the court system if they don't respond.

[Tronhard]

Ernie, your statement about your association with lawyers, while interesting in itself, does not contribute in any way unless they have given you specific information relating to the issue. 

I asked specific questions of my source and got specific answers.  You have just said that you know people. Perhaps you should contact one of those knowledgeable people, ask them the same questions about patent rights and see what they say.

Any view contrary to your preferences are taken personally - but it's not about me or you, it's about seeking the most reliable information possible.  I embrace research and use reputable resources to back up my opinions.  You seem to determine your opinions based only on your own beliefs and experiences and defend them as if a contrary opinion is a personal attack on you. It's not.

"You seem so confrontational lately."  Funny, Ernie, I would have said exactly the same about your posts.

[Tronhard]

Given that Viltrox have withdrawn the RF lenses from the market, it seems they have chosen to avoid litigation, at least for the time being.  Given Canon's legal resourcing and experience in patent protection, I would be very surprised if there is a challenge. Still, we shall see...

[deebatman316]

I guess that means all other 3rd parties will not make lenses or adapters for the RF Mount. To avoid litigation against them from Canon.

-Demetrius

40D, 5D IV, EF 16-35mm F/2.8L III, EF 24-70mm F/2.8L II, EF 28-135mm F/3.5-5.6 IS USM, EF 50 F/1.8 STM

430EX III-RT, 600EX II-RT

[Tronhard]

I don't know. I think it is noemalvfor the OEM to set up licensing and realease IP to allow 3rd parties' gear to work.

[deebatman316]

I thought 3rd parties reversed engineered the electronics in the lens mount to allow AF, IS, aperture control, lens metering and distance info for TTL to work correctly. That's why there are some incompatibilities between old lenses on new bodies. 

-Demetrius

40D, 5D IV, EF 16-35mm F/2.8L III, EF 24-70mm F/2.8L II, EF 28-135mm F/3.5-5.6 IS USM, EF 50 F/1.8 STM

430EX III-RT, 600EX II-RT

[Tronhard]

That might be true to some extent, depending on the agreement with the OEM. Reverse engineering without an agreement would be a breach of patent. You will see that as a standard clause of any product or servise you use. Read a few licesnse agreements for software for example.

[deebatman316]

I have an old Sigma 17-50mm F2.8 EX DC OS HSM which worked fine on my old 40D but when I tried to use it on the 90D it caused an error message. I ultimately bought the 5D Mark IV instead of buying a new APS-C lens. I already owned a few Full Frame L lenses. I get to put them to full use now. Did Canon do the same thing with the EF and EF-S lens mount too. No 3rd parties make EF-S lenses they make EF lenses with an APS-C image circle instead.

-Demetrius

40D, 5D IV, EF 16-35mm F/2.8L III, EF 24-70mm F/2.8L II, EF 28-135mm F/3.5-5.6 IS USM, EF 50 F/1.8 STM

430EX III-RT, 600EX II-RT

[rs-eos]

Yes, reverse engineering violates the license (hardware or software).  And once the license is invalid, various consequences would kick in.

[Tronhard]

Demetrius wrote: "I thought 3rd parties reversed engineered the electronics in the lens mount to allow AF, IS, aperture control, lens metering and distance info for TTL to work correctly. That's why there are some incompatibilities between old lenses on new bodies. "
The reason that older lenses don't work so well with new bodies is their initial design, including firmware (although in come cases that can be improved for more expensive lenses) and the motor speed to actually achieve focus.  Nano-USM motors on the new generations of lenses, for example, are much faster at acquiring focus than older USM motors of generations before.   This applies to native lenses as well as 3rd party units.