Accu-Lite™ cuts no corners in providing world class magnification & clarity for a number of precision industries. Many low cost, low quality products you see for sale these days have green tinted glass in them. This glass is not designed for precision inspection equipment... its designed to be inexpensive. As a result, not only does color rendition suffer, but clarity and resolution are much poorer than optical quality glass... but it also adds unneeded eye strain and fatigue! When selecting an inspection product for long term use, this detail could not be more critical. Only crown white optical glass should ever be used in quality inspection. Don't accept poor quality... choose Accu-Lite™!