The Longpass series filters are designed to pass a wide spectrum of waves, including long waves, while blocking shorter waves (~> 480nm). The peak transmission is> 90%. The filters have a perfectly smooth active surface, thanks to which they do not negatively affect the obtained image. All models have anti-reflective coverage to improve transmission in the VIS and NIR range. Filters are available in various sizes, with threads corresponding to the most popular solutions used in lenses.