Optolong 2" L-eNhance FilterOptolong L eNhance provides an economical and practical solution for amateurs. It is a dual band pass filter which has been designed for DSLR (digital SLR), color CMOS and monochrome CCD cameras. The convenience and cost effectiveness of this filter allows amateurs to image a rich selection of astronomical images, even in bright, heavily light polluted areas. Optolong believes the design of our L eNhance filter is a technical innovation among filters.