During the Canon EOS R5 development announcement, Canon also announced that there will be a total of 9 RF lenses coming in 2020, including already announced RF 24-105mm f/4-7.1 IS STM Lens (B&H Photo Video/Adorama/Amazon), RF 100-500mm f/4.5-7.1L IS USM lens, Extender RF 1.4x, Extender RF 2x. So what are rest of 5 new RF lenses ? According to CR, below are rumored 5 new RF lenses coming in 2020:
Canon recently has filed two new RF lens patents in USA and Japan. Both lens patents are RF mount ultra-wide zoom lenses. The first one is RF 14-28mm f/2L USM lens, this lens will pair nicely with the RF 28-70mm f/2L USM lens. The second one is RF 10-24mm f/4L USM lens or RF 12-24mm f/4L USM lens, similar to EF 11-24mm f/4L USM lens.