possible to AF with 2x extender at aperture f11?
is there a possibility to make my 5D focus if i mount the 100-400L with my kenko 2x extender?
i remember focussing was possible on one of my older canons (20D?) since it didnt "know" there was the kenko mounted and still displayed f5.6 while in reality it was f11 with the extender.
any possibility with the newer canons? maybe by taping some of the contacts?
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