1 YN35MM F2S DF DSM Lens. Model" YN35mm F2S DF DSM. Quiet CNC Stepping Motor Integrated, DSM Motor. Mount E Mount. Aspheric and Low Dispersion Lens. Compared with traditional DC motors, digital stepping motors (DSM) have fast start-stop response, high focusing accuracy, and quieter focusing actions, which are suitable for photo shooting and video recording.
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