Canon EF-S 24mm f/2.8 STM Lens – Opened But Unused (Like New). STM motor for quiet, smooth autofocus. Canon EF-S 24mm f/2.8 STM Lens. Itsslim profile (under 1" thick) makes it an ideal choice for travel and on-the-go shooting, while theSTM autofocus motor ensures fast, smooth, and nearly silent focusing — especially great for video use with Movie Servo AF.
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