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The material of this are all colorful glass, they are themself is in color without coating. The have different properties in optical filed.

The coating filter manufacturer, the company do the filter with a certain light wideth, so for the requirement, the coating will using in different standard. we focused on coating and polishing, so the substrate of the coating is done by ourself, and then we have a futher understanding of the glass and lens we have, so we can do a good job in the coating.

If you are interested in this ,please contact with us.