The lenses are all coated optical glass, the lens frame is made of aluminum alloy material, the clip is made of plastic material, exquisite workmanship and durable 198 Degree Fisheye Lens: 198° fisheye lens gives your image a round, fish bowl effect while also acting as a wide angle lens, which can let you enjoy a fantastic world 0.63X Wide Angle Lens: Wider range, brighter than mobile-phone shoot, can shoot large range of scenery 15X Macro Lens: Narrower range and clearer than mobile-phone shoot, apply to shoot flowers, grasses, insects, tiny objects, etc. 2X Telescope Lens: Clearer, narrower and brighter than mobile-phone shoot. It gets you 2 times as close to the action CPL Lens: Circular polarized lens filters polarize light, reduce unwanted reflections from non-metallic surfaces such as glass or water, enhance colors and increase contrast Specifications: Fisheye Lens: Angle: 180-198 degree Magnification: 0.28X Lens Construction: 3 elements in 3 groups Max Diameter: 25mm Length: 15mm Wide Angle Lens: Magnification: 0.63X Lens Construction: 2 elements in 2 groups Max Diameter: 20mm Length: 5mm Macro Lens: Magnification: 15X Lens Construction: 1 element in 1 group Max Diameter: 20mm Length: 6mm Telescope Lens: Magnification: 2X Lens Construction: 2 elements in 1 group Max Diameter: 20mm Length: 11mm CPL Lens: Lens Construction: 2 elements in 2 groups Max Diameter: 20mm Length: 8mm Note: The macro lens and wide angle lens are screwed together, you need to unscrew it to get two lenses.