AF fine tune and focus shift for fast lenses

Started Sep 12, 2016 | Discussions thread
Ferguson
Ferguson Senior Member • Posts: 1,826
Re: AF fine tune and focus shift for fast lenses

Marianne Oelund wrote:

Lens focus shift isn't seen by the AF system.

Starting with models released in 2014, Nikon added a compensation feature to AF, which basically works by biasing the fine-tune value according to which aperture the lens will be taking the image at. This requires the camera to have tables of focus-shift values for various lenses. Cameras made prior to that time, have no such compensation and must be fine-tuned using compromised settings.

I had never heard that.  Is that also in the lens distortion database that's in the second firmware file?

And is that only in models since 2014?   Or firmware (e.g. D4 and D800 were 2013 but have later firmware updates)?

I need to go back now and experiment with the 85/1.4.  I used a D800 to do my initial testing, I'll give it a go with the D5.

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 Ferguson's gear list:Ferguson's gear list
Sony a7R IV Sony a9 II Sony FE 24-70mm F2.8 GM Sony FE 70-200mm F2.8 GM OSS Sony FE 85mm F1.4 GM +2 more
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