Canon Rumors reports that still more EF lenses are being dropped this year from product lists. Interestingly, the reportedly newly-redundant lenses include big whites such as the 300mm f/2.8 II, the 400mm f/4 DO II and the 500mm f/4 II.
Canon will reportedly continue to service these lenses through 2027.
The inclusion of the big white models may indicate that Canon plans to release RF mount versions of those prior to the end of the year, which would contradict recent rumors indicating they wouldn’t be available until 2022.