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When will Sigma and/or Tamron produce RF lenses?

Started Jan 15, 2020 | Polls thread
sportyaccordy Forum Pro • Posts: 20,562
Re: Is a matter of question on HOW

Alexander Rosenwald wrote:

Peter Kwok wrote:

The easiest way is to redesign the current EF mount lens as RF mount lens, by making the barrels longer in place of an adaptor, resulting in a collection of lens that is slightly longer and heavier.

Those would still be EF-lenses, just with a build in adapter. I can't see any reason at all to buy such a lens. They are less capable than EF-lenses. You can't use control-ring-adapters or filter-adapters for example and you can't use them on EF-bodies. They are totally pointless.

The main challenge for Sigma and Tamron is to re-engineer the RF-protocol. This could not be done in a few month. It will take years.

Such lenses would still have a lot of value. Pretty much the only thing that would be missing functionally would be the high speed display, which only matters for certain kinds of shooting. These lenses would still be able to take advantage of the RF mount parameters (unlike adapted EF glass) and it's possible that they could reverse engineer the control ring functionality too. I agree that Canon has the upper hand (as they always have) but that won't make EF protocol RF lenses useless. The EF-RF adapter protocol is the best in the business.

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