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RF 100-400 vs 2x EF 70-200 F4 on an R6

Started Feb 9, 2022 | Discussions thread
drsnoopy Senior Member • Posts: 1,216
Re: RF 100-400 vs 2x EF 70-200 F4 on an R6

I can confirm that the EF70-200 f4 L IS (mark i) with the TC 1.4x (mark iii) works just fine on the R5. However it is rather slower to autofocus than many EF lenses, and slightly worse with the TC. I sold that lens and bought an RF100-400 which is the same physical size as the EF 70-200 (actually smaller when you consider you need the adapter too) and in my view a better package - maybe a little better IQ, but twice the reach, and much faster AF.  If you can afford it, the RF100-400 is a good option.  It isn’t weather-sealed.

I still have my EF 100-400 L mkii and the 1.4 TC, which I will continue to use when weight and size are not an issue.

The EF 400/5.6L has always been a good lens and will be stabilised on the R6, but my understanding is that the max frame rate is reduced. In the UK, a good used 400/5.6 L and a new RF 100-400 are about the same price.

 drsnoopy's gear list:drsnoopy's gear list
Canon EOS RP Canon EOS R5 Canon EOS R10 Canon EF 100mm F2.8L Macro IS USM Canon RF 35mm F1.8 IS STM Macro +10 more
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