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Is it possible to stack 2 Canon RF teleconverters? eg twice 2X TC

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yvesg888 New Member • Posts: 2
Is it possible to stack 2 Canon RF teleconverters? eg twice 2X TC

I do own a Canon EF 600 mm F4 Model II and have successfully used it with my eos R5 with TWO 2X teleconverter with a 12 mm extension tube between them. I do then get a 3840 mm reach with the 1,6X factor crop, the R5 allows. (600mm X2 = 1200mm X2 = 2400 mm X1,6 = 3840 mm.)

I does keep focusing and the eye tracking is still functioning. Believe it or not!!! I have pictures to prove it! Look at the link below :

https://www.flickr.com/photos/139677032@N08/51318434113/in/dateposted-public/

Now I'd like to upgrade my lens to an Rf version and I am wondering :

Question #1 : Is it possible to stack TWO 2X RF teleconverters together?

I have read somewhere that one would need a 24 mm extension tube to do so.

Question #2 : Is it right? (A 24 mm extension tube is the right lenght?)

But I have not found any brand of teleconverter that would have a hole large enough to allow the insertion of the TC in it.

Question #3 : If a 24 mm extensin tube is necessary : what brand will allow the stacking of the TCs?

Thanks in advance for your help!!

Canon EOS R5 Leica X1
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