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Teleconverters RF vs EF

Started 1 month ago | Discussions thread
Steve Balcombe Forum Pro • Posts: 15,571
Re: Teleconverters RF vs EF

Shawn1519 wrote:

But one strange anomaly still exists (and this was pointed out by one person in this thread). By design, a RF tele won't fit on a EF2RF adapter. But yet the RF 600F4 and RF 400F2.8 lenses violate this design by allowing a RF tele to fit on the back of the (built in) EF2RF adapters on those 2 lenses. This tells us that Canon modified the EF2RF adapter that they welded onto the RF 600F4 and RF 400F2.8 lenses.

I'm not sure that's what it tells us, or at least that's not the nub of it. Yes the built-in 'adapter' has to be different to physically accept the TC, but there's no reason I can think of why Canon couldn't have done the same with the normal adapter. But maybe the combination of an EF lens and an RF teleconverter is something Canon didn't want to support. I've been critical of several choices Canon has made regarding the RF mount (like why are there still no extension tubes???!!!) but this one does probably make sense.

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