RF lenses feature an additional control ring to give you a faster response in changing camera settings and altering the degree of correction. The customisable control ring can be used to adjust shutter speed, aperture, exposure compensation and more. Find out more about the other features of EOS R: https://snapshot.canon-asia.com/article/reimagine-optical-excellence-with-eos-r TVC shot on EOS R: https://snapshot.canon-asia.com/article/behind-the-scenes-filming-a-tv-commercial-entirely-on-the-eos-r