fluorite lens 中文意思是什麼
fluorite lens
解釋
螢石透鏡-
By combining do lens elements with normal refraction elements, color aberration is corrected to levels even higher than is possible with fluorite elements
Do鏡片與普通的折射玻璃結合在一起,色散的校正水準甚至高於螢石鏡片。
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