When to apply AF Fine tuning?

[geossl]

Dear All,
 
  Nikon manual said it is not recommended to apply AF fine tuning unless necessary.

  When to apply af fine tuning is appropriate?

[Rhossydd]

When to apply af fine tuning is appropriate?

When your lenses aren't focusing as well as they could be.

[Bart_van_der_Wolf]

When your lenses aren't focusing as well as they could be.

Hi,

That's correct, but only if there is a systematic bias towards front or back-focusing every time. AF fine tuning works great for removing the bias, but there will always be some inaccuracy left depending on the AF system and lens.

Cheers,
Bart