JJC LH-74 (T) Lens Hood (Lens Shade, sun visor) for Canon EF 70-200mm f / 4L ET-74 (Electronics)
which was claimed here that would not GeLi bayonet lock, I can neither understand nor confirm. Of course, the bayonet lock is present, at the beginning it is a bit heavier than normal (perfectly normal!). Just set up and 90 ° (the label "JJC" is