https://www.canonrumors.com/here-are-the-rf-600mm-f-11-rf-800mm-f-11-super-telephoto-lenses/
Canon RF 600mm f/11 IS STM Specifications:
•Retractable design
•10 elements in 7 groups
•DO element
•Minimum focusing distance 4.5m
•Maximum magnification 0.14x
•5 stops of IS
•82mm filter size
•Size: 93mm x 199.5mm (When retracted) 269.5mm when shooting
•Weight: 930g
Canon RF 800mm f/11 IS STM Specifications:
•Retractable design
•11 elements in 8 groups
•DO element
•Minimum focusing distance 6.0m
•Maximum magnification 0.14x
•4 stops of IS
•95mm filter size
•Size: 101.6mm x 281mm (When retracted) 351.8mm when shooting
•Weight: 1260g
