Lenses / Autofocus
Lens autofocus problems: checks before repair
Blurred photographs and faulty autofocus are not always the same thing. It helps to separate settings and shooting conditions from a lens or body fault.
How does the problem appear?
Tell us whether autofocus does not respond, keeps hunting, works intermittently or confirms focus although the picture is not sharp. Zoom position and focusing distance also matter.
Camera movement, a slow shutter speed or the wrong focus point can blur an image without a hardware fault. Send a sample photograph and describe the shooting conditions.
Simple checks without disassembly
Following the instructions, check automatic or manual focus selection, focus mode and compatibility between the lens, body and adapter if used. Test in suitable light on a clear, stationary subject.
If you have another known-working compatible combination, note whether the symptom changes. This can help separate lens and body problems, but is not a final diagnosis.
When should you stop using it?
Do not force a dropped lens, jammed ring or mechanism that grinds or repeatedly drives the motor. Do not apply oil or sprays or push an extended section back by hand.
Inspection is especially important after sand or liquid exposure. External cleaning does not reveal the condition of internal guides, flexible connections and electronics.
What does a repair assessment include?
Depending on the lens design, we check contacts, communication, flexible connections, focus drive, mechanics, optics and related functions. Work depends on the confirmed cause and available parts.
Send the full lens name, mount and camera body. For Sony, Tamron, Fujifilm and other systems, similar names do not mean the same parts or repair procedure.