Canon has released cinema lenses in the RF mount:
CN-R 14mm T3.1 L F
CN-R 20mm T1.5 L F
CN-R 24mm T1.5 L F
CN-R 35mm T1.5 L F
CN-R 50mm T1.3 L F
CN-R 85mm T1.3 L F
CN-R 135mm T2.2 L F
The CN-R 14mm, 20mm, and 24mm primes are $4,220. The 35mm, 50mm, 85mm, and 135mm primes, are $3,950. More...