Most of circular ﬁlters are made of brass/aluminium frame, but these kind of materials are heavy and not ideal under cold weather conditions. Because of that, NiSi created a Titanium Alloy Frame Pro Nano UV Cut -395. Itís made of Titanium Alloy Frame with Nano coated optical glass. They feature a lightweight, durability and high deﬁnition design:
Titanium Alloy Frame is light, hard, anti-corrosive, heat-resisting and with good performance under very low temperature. The density of Titanium is 4.54g／cm3, itís almost half of the volume of the same weight steel, and the hardness is twice of aluminum. Its good anti-corrosion ability makes it able to endure strong acid and base. Its melting point is 1942K, about 1000k higher than gold and 500k higher than steel. Itís commonly used in aerospace industry and missiles.
Lens Standard Optical Glass Lens standard optical glass H-K9L is high homogeneous with super low impurity and has good physical and chemical performance. It is usually processed to high precision optical element such as lens, prism, plane mirror etc.
UV Cut Nano Coating Nano coating cut the UV light below 395nm, and effectively avoid the fuzziness situation. It makes sure high transmittance and ultra low reﬂection on the glass surface. It enables the visible light come through evenly and control the colour balance. Also thereís a super strong waterproof coating with anti-scratch ability. Itís easier to remove the dust, ﬁngerprint, water stains, and keep the ﬁlters clean.
- Titanium Alloy Frame Itís light, hard, anti-corrosion, heat-resisting
- Ultra High Deﬁnition Optical glass
- Matte Black inside the frame
- UV Cut Nano Coating Nano coating cut the UV light below 395nm
- Lens Standard Optical Glass Lens standard optical glass H-K9L