1.4 teleconverter with 400 5.6 -- Canon Lenses in photography-on-the.net forums

Sgt.

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Aug 27, 2014 07:57 | #1

So I thought the 1.4 mkiii tele should autofocus on 5 D mkiii with the 400 5.6?

Any body try this?

Iain
7D MKII
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JWdlft

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Aug 27, 2014 09:02 | #2

According to Canon website the answer is yes, with firmware version 1.2.3. Not all points, but yes.
There's a link to the download on that page.

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Canon Bob

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Aug 27, 2014 11:59 as a reply to @ JWdlft's post | #3

Just tried it and it works....putting the combination on the body locks you into the centre point.

Bob

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Eyal

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Aug 27, 2014 15:22 | #4

5D3 can now give you AF when using VF with lenses at minimum of F/8.
The 400 F/5.6 with 1.4x will give you 540mm F/8, which works with the 5D3.
Note that the focus points will be less accurate outside the centre with this setup.

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Canon Bob

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Aug 27, 2014 17:34 | #5

Eyal wrote in post #17121246

Note that the focus points will be less accurate outside the centre with this setup.

I don't think you can even select focus point outside the centre once you mount the combination....I couldn't when I tested it earlier.

Bob

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Sgt.
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Aug 29, 2014 14:19 | #6

Thanks, I had to update my firmware!!

Iain
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