Optolong L-Extreme 7nm Dual Narrowband Filter (H-Alpha and O-III) (1.25")

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Click here for the best price: https://amzn.to/4iHdnka This is an Affiliate link Optolong L-Extreme 7nm Dual Narrowband Filter (H-Alpha and O-III) (1.25") Optolong L-Extreme 7nm Dual Narrowband Filter (H-Alpha and O-III) (1.25") This presentation contains images that were used under a Creative Commons License.