have you found any downsides? I am debating this lens. I am already using an EF adapter, so wondering if the RF is better than the f/2 EF.
Yes. The RF extends when focusing, especially in the macro range. It reminds me of the old 35f2 non-is or 50 1.4. The R will focus it to infinity when you turn off the camera which retracts the barrel. But if I’m not turning off the camera, I try to refocus so the barrel is retracted, since it seems vulnerable when extended. The EF lens focuses internally and does not extend.
This is purely opinion, but I would say focusing is slightly slower and noisier with the RF lens. Probably because of the macro. But it doesn’t really impact my use or video. Just something I noticed.
Again just opinion but I would say image quality is pretty similar between the two. The RF is smaller in size. Like the f2 IS went on a diet. Makes a big difference especially when the adapter is added to the EF lens.
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