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Optolong Oxygen III 12nm

agenaastro.com/.../optolong-2-o-iii-12nm-narrowband-ccd-nebula-filter.html
TypeOxygen-III (OIII)
SizeOther
Bandwidth12 nm
Users 7
Images 26
Most often used with
Nikon D5300 (modified)
Also available in the following variants:
1.25"
2"
EOS Full