Fast and silent STM autofocus motor.
Viltrox AF 40mm f/2.5 Air Full Frame Lens for Sony E Mount - UKSeller
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Viltrox AF 35mm f/1.7 Air Prime Lens for Sony E Mount - UK Seller - New!
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Viltrox AF 25mm f/1.7 Air Prime Lens for Fuji X Mount - UK Seller - New!
