Sigma Abbreviations (OS / ART / DG / EX / APO)
Abbreviations on Sigma Lenses
DG - Full Frame
DC - Cropped Sensor
DN - Mirrorless
OS - Optical Stabilization
C - Contemporary
A - ART
S - Sport
EX - High-End (Older)
APO - Apochromatic (Older)
HSM - Hypersonic Motor Drive
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