TO Narrowband Nebular Filters
For heavily light polluted areas. Enhance your deep sky viewing with the latest in multi-layer coating technology. Over three years in development. Our filters transmit desired wave-lengths in a very steep slope vs. gentle transition slopes in competitive brands. This means better contrast and overall performance.MANUFACTURED IN THE U.S. Available for 1.25" and 2" eyepieces. Cells are color coded.