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Teleconverters RF vs EF

Started 1 month ago | Discussions thread
J.K.T. Contributing Member • Posts: 512
Re: Teleconverters RF vs EF
2

The reason the RF2EF adapter does not fit in front of the RF TC:s is not optical. It is mechanical interference between the extruding part of the TC and the light baffles in the adapter. The adapter needs the baffles in order to eliminate unwanted reflections with ALL the EF lenses. There are some sad examples with third party adapters on why that matters. I'd never use my modified adapter without TC - that would be asking for trouble.

When they made the tele lenses, they didn't have to worry about how reflections on any other lens work - they just had to avoid reflections on THAT lens. That they have been doing for decades. Sometimes there are baffles, sometimes not. They also have more freedom to design the potential baffles as the TC in those lenses seems to be yet another design and even further away from the sensor than the EF extenders are.

[It appears Steve already wrote most of this, but I missed it.]

 J.K.T.'s gear list:J.K.T.'s gear list
Canon EOS 7D Mark II Canon EOS RP Canon EOS R7 Canon EF 135mm F2L USM Canon EF-S 17-55mm f/2.8 IS USM +15 more
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