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SBIG Oxygen III

diffractionlimited.com/.../36-mm-round-optical-filters
Frozen as ambiguous
TypeOxygen-III (OIII)
SizeOther
Bandwidthn/a
Users 8
Images 57
Most often used with
SBIG Aluma AC4040
Also available in the following variants:
36 mm
50 mm
50x50 mm