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Wanted: Astrodon OIII (and SII?) 1.25" 5nm (or 3nm) Filters Wanted

Price - $300.00

Ad Number: 158453

Posted: 06 Jan 2019

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I've been using the original 31mm ZWO Filters that came with my ASI-1600MM-Pro camera when I bought it last spring and have been enjoying it overall. I did upgrade to the Astrodon (Gen 2) LRGB filters and also got the 5nm Ha Astrodon filter. Now that I'm finally starting to image in NB though, I miss the parafocal nature of the Astrodons not reflecting over to my OIII and SII filters (not to mention the OIII at least gives a few reflections the Astrodon doesn't). So, on the hunt for the 1.25" Astrodon O and possibly S filters. OIII is top priority, but if someone has both the O and S filters to sell, I'd consider them both (also note the listed price I put up is per filter, not for both - and depending on the 5nm vs 3nm version that might change of course)!

Looking for the 5nm versions of the filters (not the old 6nm). Alternatively (or better yet), the 3nm version of the OIII filter would especially be desired (though it might be a little more). If someone has some (of the 1.25") they're looking to sell, please let me know! Thanks!


  • Condition Used
  • Location Williamsport, PA

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