菲涅尔镜片又称螺纹透镜，镜面上刻录了大小不一的螺纹。上一代主流会采用菲涅尔镜片因为这样透镜更薄更轻，厚度很薄，通常只有几毫米，重量也大大减轻。使用螺纹镜片会有一定的牺牲，因为螺纹会影响曲率和光线聚焦。 Now, that explained: being a cheap bastard and loving used electronics, I have experienced lousy luck with Refurbished things in general. Refurbished to me generally usually means it abs... https://coingenius.news/web-3-0-infrastructure-a-conversation-with-matt-hawkins-ceo-of-cudo-slatecast-40/