Yes, this charger also works with Canon batteries. 100% original compatible. 

The Olympus 100-400mm IS lens size is 72mm, please reconfirm the number mark as "ø" (diameter) symbol, if the number is 72, just need to order same 72mm size filter ,thanks. 

The K&F barely supported a Canon 400mm lens using the support arm of the lens. I found I had to really lock down to get the lens to hold position. I have moved on to another brand. 

FD-EOS fit for Canon FD mount lens and canon EF mount camera body. canon 60d is EF mount, so the adapter ring can work with your camera, but you need to check your lens mount. could you pls let us know your lens specific model? service(AT)kentfaith(DO NOT)com, Please note: It is not same between Canon FD mount and EF mount, this adapter ring is only for Canon FD mount lens, please contact us if you want to purchase for Canon EF mount lens. 

Yes, I use it with my Canon 6D and Tamron 24-70mm. It's an amazing tripod.