1, high-end brand: Zeiss, marked with the word "Z".

2. Mid-range brand: SOLA, marked like an eye with the character "S"

3. Low-end brand: AO, the logo is "AO".

Sola (Su Na) is the first manufacturer to introduce resin lenses into China market. Once together with AO (American Optics), it seized the resin lens market in China. Later, AO was acquired by SOLA and became the low-end brand of SOLA. Later, SOLA was acquired by Zeiss, so there were three brands: high, medium and low.

Gleditsia sinensis in rough field

Zeiss