focus question please

Joined
Jun 12, 2007
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1,535
Location
UK
Nikon D810 and Nikon 24-70mm f2.8G lens. I know fine tune is for back front focus but that is not the issue, To get a reasonable, or should I say best, sharpeness across the lens mm range I have had to set the fine tune scale to +10. I am thinking this is a poor lens copy ,am I correct. I have had this lens for some years so can they go out of focus after a time? and if so can it be corrected

My other lenses such as the 70-200 mm f2.8mm are more or less spot on +/- zero on the scale so it is not the camera.

Thanks for looking and any repies welcome as I am considering getting the tamron G2 version as a replacement
 

Butlerkid

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Steve Perry said not to be concerned if you even needed to adjust to + or - 15....or even 20! The adjustments are in very, very small steps.
 
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