Canon Community

RF lenses are designed for full-frame cameras – if used in APS-C cameras a 1.6x factor appliesPlease suggest which RF-S lens available 

what the cons of use third party  company Lens like sigma, Tamron etc. and for this like Mount adaptor What are the cons of using third party company lenses like Sigma, Tamron etc. and is a mount adapter required to use them?

RF lens directly use with EOS R50 or use with mount adaptorRF lenses can be used directly with the EOS R50 or will require a mount adapter.