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Teleconverters RF vs EF

Started 1 month ago | Discussions thread
Bigger Contributing Member • Posts: 640
Re: Teleconverters RF vs EF

Abbott Schindler wrote:

If I understand you correctly, you want to try this:

R series camera - RF Extender - RF-EF adapter - EF big white

This is a nonstarter: the RF Extender won't fit into the RF end of the adapter.

If you want to use an Extender with an EF big white, you need to do this:

Camera - RF-EF adapter - EF Extender - EF big white.

OTOH, I've tested, and extension tubes work both ways:

Camera - RF-EF adapter - EF extension tube - EF lens

Camera - RF extension tube - RF-EF adapter - EF lens

Not true. There are RF-EF adapters that can accommodate the RF TC snout, including the Commlite CM-EF-EOS R, and these can connect to any EF lens, even ones that don't connect to an EF TC.

https://www.dpreview.com/forums/post/65820763

The problem with this setup is that Canon didn't intend to support this, so the EXIF data does not contain the correct focal length with the TC.

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