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Astronomik OIII Filter, 13nm Bandpass, 2" For Sale


Astronomik OIII Filter, 13nm Bandpass, 2



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Astronomik OIII Filter, 13nm Bandpass, 2":
$225

Like-new condition.
Note this is the older, slightly wider 13nm bandpass, not 12nm. This filter
Works great at F2.8, as the jpg of the nebula described below shows.
Also note the blue tint in the jpg of the filter is from my ancient Canon G2
compact camera, which is cyan-challenged :-)The attached image was taken with this OIII filter, plus an H-alpha filter I
sold separately, no other narrow band filters, no L/R/G/B filters, using
a Canon 70-200mm F2.8 lens I sold separately, and processed with Pixinsight.That jpg shows the use of an OIII filter to bring color to the myriad stars,
and lend a little subtlty to the colors of the nebula, with only 2 filters:
Cyan can serve as both G and B. I only wish I'd had an H-beta filter
for B when I took this.Price includes PalPal fee. Buyer pays shipping.
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