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Canon Cameras that Retain Autofocus with Canon Teleconverters?

Started Aug 22, 2014 | Questions
HertsBirder New Member • Posts: 1
Canon Cameras that Retain Autofocus with Canon Teleconverters?

Could anyone tell me which Canon camera bodies retain autofocus (without taping the pins) with a canon 1.4 teleconverter?

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RS_RS Senior Member • Posts: 1,788
Re: Canon Cameras that Retain Autofocus with Canon Teleconverters?
2

HertsBirder wrote:

Could anyone tell me which Canon camera bodies retain autofocus (without taping the pins) with a canon 1.4 teleconverter?

All EOS bodies provide phase-detect AF with all Canon Extender 1.4× models provided that the extender-compatible EF lens to which the Extender is fitted has an aperture of f/4 or wider (so the combination has an aperture of f/5.6 or wider). Some high-end EOS bodies (EOS-3, EOS-1V, EOS-1D series, EOS 5D Mark III – 1DX and 5DII only with updated firmware) provide phase-detect AF with a combination that is f/8 or wider, but only at the centre point or, on the 1DX and 5DIII, expanded centre point. I think that there may be a few specialist lenses that do not quite follow these simple rules, and on the 61-point AF system of the 1DX and 5DIII there are quite complicated tables of exactly what happens at each AF point with each lens or lens+Extender combination.

PalmettoFellow Senior Member • Posts: 1,171
70D will autofocus with all Canon lenses, even with 2X

Canon limits the minimum (maximum) aperture of their lenses to f5.6 to ensure compatibility with all af sensors. In live view, the 70D is capable of AF at f11!
So even an f5.6 lens with the 2x Tele converter, the 70D will autofocus on that camera. At least, it should unless Canon artificially blocks it.

 PalmettoFellow's gear list:PalmettoFellow's gear list
Canon EOS 70D Canon EF 100mm F2.8L Macro IS USM Canon EF-S 18-135mm F3.5-5.6 IS STM Canon EF 35mm F2 IS USM Canon EF-S 55-250mm f/4-5.6 IS STM +1 more
rebel99 Veteran Member • Posts: 4,025
Re: Canon Cameras that Retain Autofocus with Canon Teleconverters?

HertsBirder wrote:

Could anyone tell me which Canon camera bodies retain autofocus (without taping the pins) with a canon 1.4 teleconverter?

all of the 1D bodies and 5DIII with new firmware. also, all of the lenses with up to f4.0+1.4x or 2.0x TCs with mentioned cameras.

cheerz.

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