Vary focal micro adjustment

Orville

Orville

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Why is vary focal micro adjustment not yet built into DSLR bodies? Standard micro-adjustment has been widely available for 3 or 4 years, but this does not always work well with zoom lenses. For instance, setting +3 on my old 70-200mm would work perfectly at 200mm, but would be slightly OOF at 70mm (which required no adjustment).

As most modern lenses report focal length to the body, why not have a range of 4, 6, 10 or whatever number of user definable ranges?

For example
70-100mm = 0
101-120mm = +1
121-150mm = +2
151-200mm = +3
 
5D3 has AF microadjust settings for max and min focal lengths. That should do. Prolly 1DX too, maybe others.
 
I didn't realise that the 5DIII offered min and max focal settings, but as some lenses have such a wide range, even two settings seems puny. I guess it proves that multiple options are easily doable, so perhaps we'll see a full range of options in the future.
 
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