AstroStreet UV/IR Block Filter UV/IR Filter for 2" (50.8mm) Filter Diameter M48
Blocks UV and IR rays, improving contrast of CCD photography.
Can be used in conjunction with other filters and Nebula Filters.
The glass material uses Schott B270 glass with a thickness of 0.04 inch (1.1 mm) and is precision polished on both sides.
In addition, this product is made with a dielectric beam splitter coating for excellent precision.
[Sleeve Diameter] 1.25 inch (31.7 mm) Filter Diameter
The data is published in the catalog.