Lens Focusing Ring Adapter
Related Faq
Q
Given max filter size is stated at 82....using it on a 95 filter size lens (like Sony 200-600) will cause any vigneting?
A
hi,this Pro Kit filter can not used on 95mm size lens,because we do not have 95mm adapter ring. 
Q
Q. Do you have magnetic step up rings?
A
1. Yes, if you do not use UV, the adapter ring must be used 
Q
Does this stop at infinity or does it focus past infinity? I need a simple infinity only adapter.
A
This has no focusing capability. That said it will allow your lens to infinity focus the same way as it did on its original mount. It won’t change that. The only issue I can imagine is the quality control issue if any from adapter to adapter, manufacturer to manufacturer. Basically if your lens goes past infinity then it won’t change anything with it mounted on this adapter or any other 
Q
Some questions about the aperture
A
  1. please judge whether your lens could adjust the aperture there is only Nikon(G),also called AI(G) adapter ring has the aperture control ring, and is only for Nikon G lens,
    If you want to use nikon AI lens on this Nikon(G) adapter ring, it could be attached, but the aperture control ring could not be used as
    there is a pin on Nikon G lens that could move the aperture control ring but no on AI lens.
  2. Some buyer mentioned could not adjust the aperture, actually this is because your lens does not have the aperture control function, If your lens does not have a manual aperture control ring, it will stop down to its smallest f/stop by default
  3. Since there is no electronic contacted on our adapter ring, so could not transfer the aperture number to camera.
 
Q
Does this convert the focal length in any way? Does it allow infinity focusing?
A
A RF lens like a Leica-M lens will NOT focus to infinity on a SLR body like the Nikon. The Leica lens will only focus to a few inches, like a macro lens. 
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