Contax Yashica Lenses to Canon EF Lens Mount Adapter K&F Concept M14131 Lens Adapter

SKU: KF06.129

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Dear customer, Thanks for this question, we already did instruction picture and tips for "how to remove the lens adapter", plz see the instruction picture in the "Product Description".Hope it helps 
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This adapter is non-electronic and so will not enable electronic communication between lens and camera, so no autofocus. 
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This adapter ring Nikon-EOS is for Nikon F mount to Canon EOS camera, you mentioned your lens mount is F mount, so this item is useful for you. 
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Dear Customer, so sorry to tell you that this adapter won't allow your nikon 1 s1 lenses to mount to my canon t2i. 
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hello. the adapter can work with a nikon af-s dx nikkor 35mm f/1.8g to 6d mark 2 
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hello , the AI to EOS adapter ring i ssuitable for nikkon AI Mount lens and canon camera body. so you need to confirm your sigma lens specific mount . We care about our customers, any questions, you can ask us directly at customer@kentfaith.com. All emails would be replied in 24 hours, no exception. 
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Nikon(G)-EOS fit for Nikon G Lens and Canon EOS Mount Camera ,your cannon 80D is E mount camera, so the adapter ring is fit for your camera 
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hello, The Nikon-EOS adapter ring fit for nikon AI mount lens and canon EF camera. so the adapter ring fit for your Nikkor 55mm 3.5 ain’t lens on to canon 80d