07-24-2017 10:25 PM
I understand that the autofocus function could be rendered non functional when using an extender with certain camera bodies and lens combinations. I have a t4i camera body and the two lenses I use primarily are a 24-105 mm f4 and a 70-200 mm f2.8. I have tried to ascertain this information from searching the forums but can't see to find a defintive answer. Thanks.
07-24-2017 11:13 PM
This thread is the best source of TC info I know of.
http://photography-on-the.net/forum/showthread.php?t=41922
07-25-2017 10:17 AM
First there is no good reason to use a t-con on a 24-105mm. So that's out of the question. The 1.4x II works fairly well with the 70-200mm f2.8L fo rme. So I see no reason why it won't do so for you.
07-25-2017 12:18 PM
@themanfromvan wrote:I understand that the autofocus function could be rendered non functional when using an extender with certain camera bodies and lens combinations. I have a t4i camera body and the two lenses I use primarily are a 24-105 mm f4 and a 70-200 mm f2.8. I have tried to ascertain this information from searching the forums but can't see to find a defintive answer. Thanks.
Yes, a 1.4X TC or even the 2X TC will work and maintain autofocus on your T4i camera with the 70-200 f/2.8 lens.
The EF 24-105 f/4L IS is not listed on the compatibility chart for the genuine Canon Teleconverters and the two may not physically mount together.
04/16/2024: New firmware updates are available.
RF100-300mm F2.8 L IS USM - Version 1.0.6
RF400mm F2.8 L IS USM - Version 1.0.6
RF600mm F4 L IS USM - Version 1.0.6
RF800mm F5.6 L IS USM - Version 1.0.4
RF1200mm F8 L IS USM - Version 1.0.4
03/26/2024: New firmware updates are available.
EOS 1DX Mark III - Version 1.9.0
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EOS R6 Mark II - Version 1.3.0
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