Lens Manual Focal Stop Adapter
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Related Faq
Q
Can the lens aperture be controlled with this adapter? I am worried that I won't be able to change aperture values as there don't appear to be any electronics.
A
Hello,although the lens will fit physically, automatic diaphragm, auto-focusing, or any other functions will not operate while using this adapter. There is no electrical contacts in the adapter ring. Full manual operation, manual focus, manual iris adjustment can be achieved with body manual exposure, aperture priority exposure. 
Q
I have a canon ae1 camera with alot of lenses will i be able to use those lenses on my canon eos t7 camera?
A
The adapter for a EOS body to a Canon FD manual is the adapter needed. The Canon AE1 uses the FD/FL lens mount. The one I purchased works without a hitch. Mine is a K&F Concept Pro lens mount for Canon FD, FL lenses. From a F1 to a 5D Mark 4 with no issue. 
Q
will my Canon lens work with my Sony a5100 with this adapter?
A
Don’t forget that it’s a manual lens adapter. Works with full manual lenses. If your lens has no physical aperture ring, you cannot control it from your camera. 
Q
Could not make focus and the image is blurry?
A
This issue could be improved according to following suggestions:
  1. Q1: Camera shutter does not release when lens is attached
    A:The lens is fully manual and does not have electrical contacts. Please switch your camera to "M" (manual) mode
  2. Q2: Images are too dark
    A:Lower the f-stop on the lens, and/or lower shutter speed, and/or raise ISO settings on camera
  3. Q3: Images are too bright
    A:Raise the f-stop on the lens, and/or raise shutter speed, and/or raise ISO settings on camera
  4. Q4: Images are not coming out in focus
    A:a) Adjust the focusing distance on the lens to the correct distance.
    b) In certain photographic situations, you may find it easier to focus at f/5.6-8 rather than f/3.5
 
Q
Why could not adjust the aperture when use EOS-M4/3 adapter ring
A
  1. As Canon’s EOS lenses are electronically controlled,most Canon EF mount lenses do not feature a manual aperture ring,so when used on our EOS-M4/3, which is a full manual operation adapter ring, the aperture could not be transferred to the camera, it will stop down to its smallest f/stop by default.
  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. You could set your aperture via this way, but we do not suggest to use this way: You can control the f-stop by putting the lens on an EOS body, stop it down using the DOF preview button, and while holding the button down taking the lens off the camera. You can then transfer the lens to the M4/3 camera, and it will retain the f-stop.
 
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