Pastikan Ring Filter lensa Anda Ukuran 37mm Sirui Nano UV Pro MRC Filters Available in High performance Brass or rugged Aircraft grade Aluminum filter rings . All filter rings provide high strength, corrosion resistance, stability and critical filter alignment. Brass rings provide enhanced strength and stability. Brass filters have L41 coatings and aluminum filters have L37 coatings on each side of the glass (waterproof, oil-resistant, scratch-resistant, anti-reflective, anti-static) for easy cleaning and superior lens protection. 22-layer anti-reflective coatings on both surfaces eliminates reflections and provides light transmission of almost 100%. Extremely thin ring (only 3.4mm) prevents vignetting even with wideangle lenses (f=16mm) Specifications Extremely thin, only 2mm. No vignetting even with wideangle lenses (f=16mm). layer protective coating (waterproof, oil-resistant, scratch-resistant, anti-reflective, anti-static) for easy cleaning and superior lens protection. Lightweight, high performance ''"scientific grade''' aluminum filter ring provides high strength, corrosion resistance, stability and critical filter alignment.