**Product Specifications:**

**Brand:** K&F CONCEPT

**Product Name:** K&F CONCEPT YI Series 28-Layer Coated UV Protection Filter

**Features:**

- Ultra-high light transmission for true-to-life visuals

- High light transmission for clarity, with a super high light transmission rate of 99.64%

- Quality assurance backed by testing reports from Beijing Zhongke Optical Analysis Research Institute

- Ultra-low reflectivity of only 0.34% for sharp imaging

- Scratch-resistant for prolonged use

- UV filter with a Mohs hardness value of 97, higher than other filters on the market

- Made of aerospace-grade aluminum alloy for lightweight durability

**Testing Reports:**

- Report ID: ZX2408, 09.19, Page 2 of 15

- Report ID: ZX240824, 24.09.19, Page 2 of 15

- Report ID: ZX240824, 409.19, Page 2 of 15

**Additional Information:**

- Water resistance with a contact angle of 114°

- Visible light transmission rate of 99.64% (420nm~680nm)

- Visible light transmission rate difference of 2.96%

- Visible light reflectance rate of 0.34% (420nm~680nm)

**Packaging:**

- Product packaging designed for the K&F CONCEPT YI Series, featuring the slogan "SEE THE UNSEEN" and Elisa Polini's signature

(Note: The provided information has been summarized and formatted into product specifications.)