Item Type: C Mount Lens Weight: Approx.121g / 4.3oz Material: Alloy and Optical Glass Focal Distance: 10-50mm Aperture Range: F2.8-C Mount: C Mount Focus Range: 10mm Focus Segment 0.1m-∞, 50mm Focus Segment 0.3m-∞ Focus Mode: Manual Focus Filter Interface: Approx.35mm / 1.4in Angle Of View (DxHxV): 10mm Focal Segment 44.2°x36.8°x24.8° 50mm Focal Section 11.1°x9.3°x6.2° Operating Temperature: -20-60℃ 1,Widely Used: C mount machine vision industrial lens is widely used in the assembly line to detect product quality. 2,Diverse Features: 10 50mm changeable focal segment, and 35mm / 1.4in diameter filter can be installed. 3,Excellent Performance: The F2.8 large aperture provides excellent performance even in low light environments. 4,Vibration Prevention: The focus ring, aperture ring and focus ring all have locking spanners, which can prevent vibration from affecting the shooting. 5,Strong Imaging Effects: Silky focus ring meets the demanding needs of photography, and the powerful image effect and the perfect sense of operation can also greatly achieve the satisfaction of photographic effects. 1 x Lens 1 x Lens Front Cover (Installed) 1 x Lens Rear Cover (Installed)