Used Askar Colour Magic D Filter Package 2"Condition: This is a used set of two 2" Askar narrowband filters, the D1 in the Ha and O III bands, and the D2 in the S II and O III. They are both in excellent condition, completely clean and unmarked. They come in their original jewel cases and boxes shown. Any dust you see in the photos 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. Description: This