“Will this adapter connect an EOS R to a Tamron 75-300mm 1:4-5:6 Lense?”

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• I’m not sure but I use it on a Tamron 100-400 and it works great. No loss in function. It does add more length. No change in crop factor. It still works as full frame.

  Answered by JamesS 4 years ago

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• if the Tamron is EF it should work no problem

  Answered by Tiky 2 years ago

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