Model Number: AK028-1 Brand Name: Aike Key Specifications/Special Features: 1. Lens construction: 4Groups, 5Elements, includes an aspheric element2.Aspherical lens reduce or eliminate spherical aberration and also reduce other optical aberrations such as astigmatism3.Glass: 5 elements Germany Imported Glass, Brand Schott4.Aspherical macro lens continuously focus 10-50mm distance from objects, photograph high sharpness images without distortion, ideal for close-up shots, such as insect, flowers, small buddha, Jewelry, PCB board, etc. Also ideal to examine skin and fur5.Wide angle lens FOV:115° Magnification:0.6X Distortion:≦0.2% 6.Coatings: Multi-layer anti-reflective coatings for double-side of each glass7.Lens housing: High grade aluminum alloy, CNC five-axis milling machine process, sand-blasting, fine finished.8. Flower petal ring: reduce ghosting, reflections, lens glare9.CPL: Mounting for 37mm CPL filter (optional)10.Can unscrew off flower petal ring, switch to CPL

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