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RF vs EF (non-L) - 'faster' primes, but 'slower' zooms?

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Wiedehopf Junior Member • Posts: 38
RF vs EF (non-L) - 'faster' primes, but 'slower' zooms?

Just an observation really, but on comparison with 'EF' series non-L lenses, for RF the zooms are 1-2 F-stops slower across their range while the primes are often 1-2 stops faster.

Primes: RF 16/f2.8 (no comparable), 24/f1.8 (EF f2.8), 35/f1.8 (EF f2), RF 50/f1.8 (same), 85/f2 (EF f1.8, but + macro)

Zooms: RF 24-105/f4.5-7.1 (EF f/3.5-5.6), 15-30 f/4.5-6.3 (EF 20-35 f/3.5-4.5), 24-240 f/4-6.3 (f/4-6.3), RF 24-50 f/4.5-6.3 (EF 24-85/f3.5-4.5).

A realistic cost comparison is difficult to do - inflation, list vs shop price - and probably irrelevant.

Is is marketing or design constraints (FF + mirrorless?), or some other factor, that is driving Canon to offer affordable RF zooms with slow(er) apertures, but often RF primes with a 'faster' max aperture compared to EF?

 Wiedehopf's gear list:Wiedehopf's gear list
Canon EOS 60D Canon EOS Rebel SL1 Canon EOS RP Canon EF 24mm f/2.8 Canon EF 35mm F2.0 +11 more
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