The parameters of triple Fabry-Perot etalon, namely, free spectral range, spectral width, peak offsets between each etalon, effective aperture and so on are optimized.
优化了三通道法布里-珀罗标准具的自由谱范围、带宽、峰值间隔和有效口径等参数。
The aperture ring is just taut enough and incredibly smooth, and obviously because they are designed for motion film and video, it is click-stop free.
光圈环结合紧密却又难以置信的顺滑，显然是专为电影拍摄设计的。
Always use air or a clean, lint-free, non-abrasive cloth to clean the laser aperture area.
请永远使用吹气或是干净，不会起毛的软布来清洁这个区域。
Always use air or a clean, lint-free, non-abrasive cloth to clean the laser aperture area.
请永远使用吹气或是干净，不会起毛的软布来清洁这个区域。
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