Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)
EF 70-200mm f/2.8L IS III USM
EF 100-400mm f/4.5-5.6L IS II USM
Both work with the Canon 2x Extender III
Using the Drop-In Filter Mount Adapter EF-EOS R
Note: The electronic contols sometimes do not work in combination with the extender when attaching. Removing and reattaching the extender is...