Sigma TS-21

Sigma kinnitusrõngas järgmisetele objektiividele: APO 135-400mm F4.5-5.6 DG, APO 170-500mm F5-6.3 DG APO 70-200mm F2.8 EX DG MACRO HSM, APO 70-200mm F2.8 EX DG /HSM APO 100-300mm F4 EX DG , HSM APO 120-300mm F2.8 EX DG HSM, APO MACRO 150mm F2.8 EX DG HSM, APO MACRO 180mm F3.5 EX DG /HSM, APO 300mm F2.8 EX DG /HSM