Kenko 1.4x on a 70-200mm F4

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baz83

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Barry
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Does anyone have a kenko 1.4x on a 70-200f4 canon? if so what is the quality,af speed etc like?
Lose a stop and goes to F5.6 I believe? Will I still have af on my 550d with this combo?

Any difference between kenko 1.4x dg v dgx?

Thanks for any advice
 
I dont know about how it hanles that 1,4tc but i do know that it reduces the light by one stop meaning it will be 5.6 as you have said and in regards to autofocus you will still be able to autofocus, with a 2x teleconverter you would not be able to autofocus unless youown a 1 series camera which can autofocus down at a minimum of f8i think i read somewhere
 
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