Subal Focus ring - 4FNS20 for Sigma AF 105/2.8 EX DG macro
For manual focus lens tooth rings must be set up. SUBAL avoids the fastening with screws - and therefore deformation and damage of the lens with precise adjustment
For Subal housing F5 / N10 / N80 / D10 / FS2 / ND2 / ND20