Canon 1.4 extender quedtion

[steve70d]

Hi all

Will the AF still wotk uf i use a Canon 1.4x extender with 70-200 f4 IS on a 70d

Cheers

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[Stan]

Re: Canon 1.4 extender quedtion

It will - thats one of the combos my wife uses

[the black fox]

Re: Canon 1.4 extender quedtion

can't see why not ,which t.c mk1 mk2 or mk3

[steve70d]

Re: Canon 1.4 extender quedtion

Am I correct in thinking the converter will make the f4 and F5. 6 ?

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[Stan]

Re: Canon 1.4 extender quedtion

Yes with a 1.4x you lose a stop of light so an f4 lens becomes f5.6. A 2x loses two stops so f4 becomes f8. Your 70D will retain af with lenses that have a max aperture up to f5.6 therefor af is retained with the 1.4x but not the 2x

[steve70d]

Re: Canon 1.4 extender quedtion

Stan, what does your wife think of it? Occasionally need longer than the 70-200 but can't justify the 100-400 really. This would be cheaper option

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[Stan]

Re: Canon 1.4 extender quedtion

It was used over the weekend shooting powerboat and jetski racing - here is an example of what it can do - 1/2000, f8 and extended to 280mm

Stan