1.4X extender - buy EF or RF?

Looking to buy another 1.4X converter to attach between my EF 600/4 III and my R7.

Should I

A) buy an RF extender and place between the camera and the EF- EOS R adapter which then attached to the lens, or

B) but an EF extender and attach to my lens on one side and the adapter on the other?

I know the latter works but is the former going to be even functional?

Thanks!

Scrumhalf wrote in post #19551664
Looking to buy another 1.4X converter to attach between my EF 600/4 III and my R7.

Should I

A) buy an RF extender and place between the camera and the EF- EOS R adapter which then attached to the lens, or

B) but an EF extender and attach to my lens on one side and the adapter on the other?

I know the latter works but is the former going to be even functional?

Thanks!

If you are going to stick with Canon all the way through the optical train, the protruding output boss of the Canon RF x1.4 Extender fouls the input "hole" of the Canon RF to EF Adapter - this configuration will not work.

It might be possible to fit the output boss of the Canon RF x1.4 Extender into a 3rd party RF to EF Adapter, I think I have read that some folks have done this by shaving some material off the 3rd party adapter.

https://photography-on-the.net …showthread.php?​p=19232459

Cheers

Dennis

nardes wrote in post #19551672
If you are going to stick with Canon all the way through the optical train, the protruding output boss of the Canon RF x1.4 Extender fouls the input "hole" of the Canon RF to EF Adapter - this configuration will not work.

It might be possible to fit the output boss of the Canon RF x1.4 Extender into a 3rd party RF to EF Adapter, I think I have read that some folks have done this by shaving some material off the 3rd party adapter.

https://photography-on-the.net …showthread.php?​p=19232459

Cheers

Dennis

Thanks, Dennis. I guess I'll stick to an EF extender for now.