Hi, I have the new Canon RF 24-50 lens and have been testing it with the N120 version WACP-1 and WACP-C on my Canon R5C/Nauticam R5C housing.  The good news is that the lens works perfectly with the WACP-1 (N120) version without any extension rings. In fact, with this setup, it does not vignette at 24mm and can be extended all the way to 50mm without touching the glass. So you get the full zoom range and presumably a 140-150 degree field of view at the wide end with 24mm.  Autofocus is