EOS 5D Mark IV
- Feb 25, 2015
The 100-500 is an L lens, the 100-400 isn't and L lens. That alone will make it a lot cheaper. And black plastic.I cant see the point of the Canon RF 100-400mm f/5.6-7.1 IS USM when we ( and me ) already have the RF 100-500mm . I can only assume its a lot cheaper .....