Indeed ... an SLR is better suited, an RF has its own uses, even if its digital. At any rate, a close up filter, even on a DSLR, is a compromise. Best to just use an SLR/DSLR with the proper close-up lens.
A side note ... I am able to use a polarizer on an RF, however. I have the Kenko which I got from Robert White in the UK, it has markings on the sides, and at whatever mark, the effect is consistent. So I just memorize the degree of effect at each marking. I no longer need the "finder"/guide that comes with the polarizer. Should be applicable to other polarizers, but one has to make marks ...
I like using the IR filter on an RF too ... on an SLR, more work involved as it becomes blind (although the Lee filter system I use helps alleviate this).
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