Used DGM NPB Nebula Filter - 1.25"This is an DGM NPB Nebular filter in excellent condition. There are few marks on the optics which can be seen in the photos provided and any dust you see is easily removable. It seems that these filters develop an electrostatic charge such that the dust in the air is just attracted to the filter. Comes in its original plastic case. Snap this up before someone else does! The NPB The NPB is the ONE filter to have if you have just one, and now regarded