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Canon 1.4X Extender (1 Viewer)

Arbu

Well-known member
I've been trying out a 1.4 X III Extender with my Canon 100-400mm (white) lens and EOS 700D body. I guess I already knew, but it's a bit disconcerting to find there's no autofocus. So I have to focus manually. I can't even get confirmation that the lens is focused through the usual red dots in the viewfinder. A couple of photos attached - the Reed Bunting is OK, the Pochard not so much.

Is it actually worth using the extender?
 

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Hi Arbu
If you have the first series of the zoom lens (EF 100-400mm f/4.5-5.6L IS USM), throw it away, sell it, but don't waste your time with a converter.
If you have the second series (EF 100-400mm f/4.5-5.6L IS II USM) then you will need at least a 7D MkII body for autofocus with a lens that has a maximum aperture of f/8. You will need any Canon EOS DSLR that can autofocus at f/8. Good luck! :)

Cheers
 
Check out the Kenko tubes. I have them but haven't used them much(bought them second hand for £50 for a set, couldn't say no). They're about £130 for the set of 3 I believe but they work with Canon AF.
 
I used to have the Canon 100-400mm MKI and used the 1.4x Extender MkII and although you had to use it with the manual focus, I found it still very good.
 
you can use the tape trick to get auto focus this putting tape on a couple of the pins on the rear of the converter,i cant remember which ones but im sure I learnt it from this site
 
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