Optolong L-Extreme 7nm Dual Narrowband Filter (H-Alpha and O-III) (2") Size Name:2" 6(female) 80ED F7 3nm 3-8mm

6(female) 80ED F7 3nm 3-8mm focal length SV260 Dielectric coatings Feature

Built-In Filter System

Blood Moon

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Optolong L-Extreme 7nm Dual Narrowband Filter (H-Alpha and O-III) (2") Size Name:2" 6(female) 80ED F7 3nm 3-8mmThe Optolong L eXtreme is a 7nm dual bandpass filter which can be used with one shot color cameras like DSLRs and CCD CMOS astrophotography cameras. It is also more suited for fast systems. The convenience and cost effectiveness of this filter allows amateurs to image emission nebulae even in bright, light polluted or moonlit skies. The L eXtreme isolates the H Alpha and Oxygen III nebula emission lines so that the contrast and signal to noise ratio