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When will Sigma and/or Tamron produce RF lenses?

Started Jan 15, 2020 | Polls thread
RDM5546
RDM5546 Senior Member • Posts: 3,654
Re: When will Sigma and/or Tamron produce RF lenses?

ProDude wrote:

R2D2 wrote:

Do we have actual confirmation yet that Sigma (or others) have actually cracked the RF code? I’d think that Canon would want to keep (RF) lens compatibility as proprietary as possible, for as long as possible (to sell their own lenses).

When others do reverse-engineer the RF code, I’d speculate that they’d start off with a non-stabilized prime first, as the IS/IBIS interface seems trickier to manage.

I’m all for competition though.

R2

The aren't "Cracking" any code or they will have a lawsuit! They have to negotiate a contract allowing them to use Canon Algorithms and Code before they jump into that water. Otherwise they are stuck in the EF Algorithm world. Just the way it IS.

I believe Sigma have license to use the patent and there wrong with long and learning from others code as long as you do violiate copyright laws. I b et they are on their own with regard to their own implementations of the the protected technologies for which I believe they may now be licensed.  C anon may not be willing to license use of their source code for actual product RF mounts.  The cold keep that as a secret sauce to maintain their lead.  There are always subtle differences from the new specific environment each product model establishes if you wish to maximize focus speed and accuracy.

 RDM5546's gear list:RDM5546's gear list
Canon RF 100-500mm F4.5-7.1L IS USM Canon G5 X II Canon EOS 70D Canon EOS 7D Mark II Canon EOS 5D Mark IV +47 more
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