D800 autofocus problems with 2x teleconverter

Started Jan 26, 2014 | Questions thread
BirgerH Veteran Member • Posts: 5,904
Re: D800 autofocus problems with 2x teleconverter

Luis Materon wrote:

I have exactly the same problem with the 2x teleconverter using a NIKON D800 and a 300 mm 1:4 D. Focus does not lock. However, I have better luck with the 1.4x teleconverter. I will appreciate to know why the 2x does not focus.


One reason might be, that your 300mm f:4 becomes a 600mm f:8 - which makes the AF system (and the metering system) unstable.

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