Canon Cinema EOS C70 Objective Lens Diameter_85mm and it can be used

and it can be used to activate long exposures (bulb)

That means you get stunning HDR images and incredible low light performance

Coupled with a large f/2

2‒4 standard telephoto lenses with hoods attached and reversed

a floating focus system that effectively controls aberration at all focusing distances has made it possible to achieve a minimum focus distance of just 0

Canon Cinema EOS C70 Objective Lens Diameter_85mm and it can be usedThe first Cinema EOS camera with an RF mount The EOS C70 is the first Cinema EOS camera engineered with a built in RF mount making it compatible with Canons expanding line of high performance RF lenses. The short flange distance helps to dramatically reduce body depth, resulting in a more compact design. EF Lens Compatibility with EF EOS R 0. 71X mount adapter In addition to RF lenses, the EOS C70 offers tremendous flexibility by also being compatible