Optec 50mm H-Alpha Round Unmounted Filter
Optec 50mm H-alpha Filter
Optec astrophotography filters are made exclusively for Optec and are not available elsewhere. The wide band LRGB set is similar in transmission to the competitors, but much less expensive. Our popular Optec LRGB + H-Alpha set is very competitively priced for all five filters.
Optec narrow band filters are centered on the H-alpha (656.3 nm) and OIII (500.7nm) emission lines and have a pass band of 8+/- 1.5 nm. Peak transmission is above 85%. All filters in this group are parfocal.
Optec Product Number: 17260
Image depicts additional optional filters and optional filter wheel.
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