ALTAIR nickaltair Posted June 28, 2022 ALTAIR Share Posted June 28, 2022 Hi there, Altair 4nm Dual Band CERTIFIED CMOS filters are in stock, and shipping now. Each filter comes with an individual spectrographic test report. Just like our telescopes with optical test reports. OD blocking, bandwidth and transmission are ideal for "extreme" light pollution, full moon, and imaging in summertime. Optimized for F4.8 or slower. For example, they're ideal for an F6.0 refractor with 0.8x reducer, or anything slower. 1 Quote Link to comment Share on other sites More sharing options...
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