D5200 with Sigma 1.4x 1401 tele converter on Sigma 150-600c, will it autofocus?

Started 5 months ago | Discussions thread
Jocksa Senior Member • Posts: 1,036
Probably not

I don’t have these so I can’t say for certain but since no-one has offered you a first hand answer I’ll tell you what I do know.

I have a 70-200 f/4 and with a TC-20 this becomes an f/8 setup. On a D7100, the autofocus isn’t useable. It drives the focus back and forward and occasionally locks on but not reliably. With a TC-17 and effective aperture of f/6.7, it’s much better and on a D500 in particular, it’s a very useable setup.

So I’m guessing on that basis that the jump from f/6.3 to f/9 would be the straw that broke the camel’s back when it comes to AF.

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 Jocksa's gear list:Jocksa's gear list
Nikon D7100 Nikon D850 Nikon AF-S Nikkor 16-35mm F4G ED VR Nikon AF-S Nikkor 24-70mm f/2.8G ED Nikon AF Nikkor 18-35mm f/3.5-4.5D IF ED +7 more
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