Making the switch to mono so this filter is now surplus/being used to fund a filter wheel. It's only ever been kept in its case or attached to a telescope in use, but when attached in the backyard its generally done a pretty good job of letting me get good results from my Sydney backyard.
Blocks out the the mercury vapour lines and associated orange light pollution whilst letting Sii, Ha, Hb and Oiii through still. Its slightly more focussed towards AP but given the wide passbands it can also be used for visual.
Further details:
https://www.astronomik.com/en/filter...cd-filter.html
Bought new from Bintel for $299 about a year ago, asking for $200 posted. (provided Auspost can get there)
NOW $175 POSTED
