Astrodon OIII 5nm Narrowband Filter - 31mm Round Unmounted.
Suits QSI 500 & 600 series cameras & Moravian Filter wheels
Images taken with this filter include 2x Apods, 2x AAPOD's and a David Malin Deep space category win.
APOD APOD DMA 2015 AAPOD2 AAPOD2 Astrobin IOD
Filter is unscratched and unmarked, currently new $330 USD at Optcorp or Astrodon direct.
Add the local US state taxes, Freight & GST - works out around $500+ AUD
Will sell for $325 or $600 paired with an Astrodon SII 5nm 31mm round unmounted
Local Melbourne pickup available. Postage extra. Add 3% if paying by Paypal.
cheers
Andy