09-14-2024 08:16 PM - last edited on 09-24-2024 10:20 AM by Danny
09-18-2024 08:37 PM
Your camera cannot AF with an aperture smaller than F/5.6. Only a few DSLR & SLR cameras can AF at F/8. Those are the EOS-3 (EOS 35mm AF SLR), EOS-1V (EOS 35mm AF SLR), EOS-1D, EOS-1Ds, EOS-1D Mark II, EOS-1Ds Mark II, EOS-1D Mark III, EOS-1Ds Mark III, EOS-1D Mark IV, EOS-1D Mark II N, EOS-1D C, EOS-1D X, EOS-1D X Mark II, EOS-1D Mark III, EOS 5D Mark III, EOS 5D Mark IV, EOS 5DS, EOS 5DS R, EOS 6D Mark II, EOS 7D Mark II, EOS 90D, EOS 80D, EOS 77D/ EOS 9000D & EOS Rebel T8i/ EOS 800D/ EOS Kiss X10i. Are the ONLY SLR and DSLR cameras that can AF at F/8. Mirrorless cameras such as Canon's EOS R series lineup don't have this restriction.
09-14-2024 09:25 PM
Yes all Canon brand EF & EF-S lenses will autofocus on your camera. Also IS will work on your lens.
09-14-2024 09:45 PM
Greetings,
Yes it will.
~Rick
Bay Area - CA
~R5 C (1.0.7.1) ~RF Trinity, ~RF 100 Macro, ~RF 100~400, ~RF 100~500, ~RF 200-800 +RF 1.4x TC, BG-R10, 430EX III-RT ~DxO PhotoLab Elite ~DaVinci Resolve Studio ~ImageClass MF644Cdw/MF656Cdw ~Pixel 8 ~CarePaks Are Worth It
09-17-2024 11:23 AM
More of a curious question, why did you think it wouldn't?
09-18-2024 08:11 PM
When I attach the lens extender on the lens everything fits just fine on the camera but the autofocus feature doesn’t work.
09-18-2024 08:37 PM
Your camera cannot AF with an aperture smaller than F/5.6. Only a few DSLR & SLR cameras can AF at F/8. Those are the EOS-3 (EOS 35mm AF SLR), EOS-1V (EOS 35mm AF SLR), EOS-1D, EOS-1Ds, EOS-1D Mark II, EOS-1Ds Mark II, EOS-1D Mark III, EOS-1Ds Mark III, EOS-1D Mark IV, EOS-1D Mark II N, EOS-1D C, EOS-1D X, EOS-1D X Mark II, EOS-1D Mark III, EOS 5D Mark III, EOS 5D Mark IV, EOS 5DS, EOS 5DS R, EOS 6D Mark II, EOS 7D Mark II, EOS 90D, EOS 80D, EOS 77D/ EOS 9000D & EOS Rebel T8i/ EOS 800D/ EOS Kiss X10i. Are the ONLY SLR and DSLR cameras that can AF at F/8. Mirrorless cameras such as Canon's EOS R series lineup don't have this restriction.
09-18-2024 08:51 PM
Thank you very much.
09-19-2024 02:27 PM
Lens extenders, first of all, are not recommended for all lenses. Canon's manuals for lenses tell you this.
Here is yours: https://gdlp01.c-wss.com/gds/7/0300003647/02/ef100-400f45-56lisusm-im2-en.pdf
Page 14 explains things clearly.
An extender causes a smaller effective aperture, so there isn't enough light for the camera to focus with. A 1.4x extender may be okay, but a 2x won't be unless a lens has a large aperture to begin with. So manual focusing is required.
09-19-2024 04:24 PM
Thank you for your help
09/26/2024: New firmware updates are available.
EOS R5 Mark II - Version 1.0.1
EOS R6 Mark II - Version 1.5.0
07/01/2024: New firmware updates are available.
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
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