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IDAS 6.8nm Ha

firstlightoptics.com/.../idas-68nm-ha-filter-f3-5-to-any-2-5mm-thick.html
Frozen as ambiguous
SizeOther
Bandwidthn/a
Users 10
Images 20
Most often used with
ZWO ASI294MM Pro
Also available in the following variants:
50 mm
52 mm
H-alpha UHS 6.8nm 2"