The Sigma 18-50mmf/2.8 EX DC Macro is a wide to normal angle, zoom lens made by the Sigma Corporation. The lens is produced in Canon EF mount, Four Thirds
The Sigma50mmf/1.4 DG HSM Art lens is a professional-level fixed focal length camera lens made by Sigma Corporation. It was announced at CES in January
Sigma50mmf/1.4 EX DG HSM is a normal primelens made by the Sigma Corporation. The lens is produced in Canon EF mount, Four Thirds System, Nikon F-mount