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You will find some of the frequently asked questions about products. If you cannot find here an answer to your question please send us an email to service@kentfaith.com
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
For example: KF21.005(58mm 0.35X)
Back thread diameter (attach to lens):58mm
Front thread diameter (attach additional filter/lens hood/ other accessories):67mm