The MidOpt BP324-25.4 is used primarily in UV imaging applications. BP324 filters have a broad spectral bandwidth in the UV range while also effectively blocking most visible and infrared light. It is important to note that there is a slight deep-red/near-IR leak that peaks at about 720nm. Because this filter absorbs all unwanted visible and/or infrared light, it is not recommended for placement in front directly in front of intense (white) light sources.BP324 Features:-Passes UV portions 320-380 nm and 280-320nm-Blocks < 280 nm-Configurations can also be supplied for mounting in front of UV LED light sources Technical Specifications Specifications + Useful Range Min 290 nm Useful Range Max 365 nm Stabledge Yes FWHM 105 nm Adhesive Backed Yes Tolerance 10 % Peak Transmission ≤ 90 % Surface Quality (Scratch-Dig) 40-20 Substrate Material Colored Glass Filter Diameter 25.4® C-Mount Product Availability + Standard Lead Time 15 Days Stock Location Built to Order Product Lifecycle Active