The MC00005000 (MC-50) is a Metallic Neutral Density Filter (evaporated Inconel on a Fused Silica substrate) with nominal transmittance of 31.6% (0.5 OD), calibrated using NIST certified secondary standards, and mounted in a precision holder designed to be compatible with standard spectrophotometer cell holders.

MC00005000 (MC-50)是一种金属中性密度过滤器(在熔融硅基板上蒸发Inconel),其标称透光率为31.6% (0.5 OD),使用NIST认证的二级标准进行校准,并安装在与标准分光光度计电池支架兼容的精密支架中。