Quote Originally Posted by Jethro View Post
Hi Sean!!

You're absolutely right, but to me the occasion to buy new RF lenses is where they offer something different over and above the existing EF collection. An example would be the RF 600mm and 800mm f/11 - which for me at least was the first time I could justify a very long prime like that. And I can recommend the 600mm highly. For me, again, the RF 100-400mm is a highly affordable and high quality lens, and would beat even a good 2nd hand EF equivalent.
That is true. Canon's transition to mirrorless has allowed them to create lenses that would otherwise have been impractical (too big/heavy/expensive) with the EF mount. Many are quite tempting... :-)