Optolong L-eNhance FilterDescription The relentless spread of urbanization and its associated light pollution have become a growing problem for all amateurs and astrophotographers. The current solutions to the problem can be expensive and might include the purchase of a monochrome camera, several types of narrowband filters, and a filter wheel. L eNhance provides an economical and practical solution for amateurs. It is a dual band pass filter which has been designed for DSLR