Dg OS Hsm

Some articles on dg, dg os hsm:

Sigma Corporation - Lenses - Prime Lenses - Macro Primes
... Macro 50mm f/2.8 EX DG Macro 70mm f/2.8 EX DG Macro 105mm f/2.8 EX DG Macro 105mm f/2.8 EX DG OS HSM APO Macro 150mm f/2.8 EX DG HSM APO Macro 150mm f/2.8 EX DG OS HSM APO ...