LP0508-P0051 - Longpass NIR 850nm filter Longpass filter is manufactured for C1, C1 PRO, C920, and Brio reworked cameras but can be used for all other applications (like astronomy). This filter blocks visible light and lets the IR portion of the spectrum reach the sensor. Dimensions Diameter: 19.0+/-0.1mm Thickness: 1.0+/-0.1mm Specifications Wavelength: >850nm Coating: AR (install reflective side face towards object) Transmittance(avg) > 80%@850-2200nm OD value > 3.5@200-800nm