The address to the manufacturer of accessories for shooting Viltrox - develop with the characteristics of their product "EF-R EOS Auto Focus Mount Adapter Canon EF mount EOS lens to R mount" new adapter, but install in a new device reducer focal length "SpeedBooster" 0.71 to compensate for crop mode shooting 4K video in cameras Canon EOS and Canon EOS R RP.

The cameras Canon EOS and Canon EOS R RP exists in the crop mode shooting 4K video, it difficult filming in this mode. Manufacturer of photo and video equipment Viltrox there are devices capable of solving this problem, but they need to be combined in one new adapter which will contain the reducer the focal length(SpeedBooster) with koeffitsientom 0.71 and the usual adapter EF-EOS R Auto Focus Mount Adapter Canon EF mount EOS lens to R mount - these devices must be combined into one that will solve the problem of the crop in new cameras when shooting 4K.