High Performance UHC light pollution reduction filter 2-inch, has improved contrast over the typical broadband filters, multi-layer dielectric coatings are plasma assisted and Ionbeam hardened.
Excellent for viewing & imaging most Nebulas from suburban & urban skies
Blocks all Mercury Vapour and both High & Low pressure Sodium vapour lamp
lighting, neon light and air glow whilst transmitting the rest of the visible spectrum
More information here:
https://www.astroshop.com.au/product...sp?id=MAS-019I
This Filter is in good condition, asking a very reasonable $100 neat, includes post in Aus
Item Pending