The lens normally is focused by altering the distance within the lens assembly towards the impression plane, or by going elements with the lens assembly. To improve effectiveness, some lenses Use a cam process that adjusts the gap in between the groups because the lens is concentrated. 그런 의미에서 https://zionypdsf.targetblogs.com/27366780/top-latest-five-아큐브-디파인-가격-urban-news