ZWO LRGB Filters1. 25 LRGB Filters Technical Parameter Size: 1. 25 Thickness: 5. 5 mm+2. 5 mm(thread) Thread: M28. 5*0. 6 the RGB color combine weights will be approximately 1: 1: 1 Fine optically polished to ensure accurate 1 4 wavefront more than 92% transmission at passband Infrared wavelength 700 1100 nm cut off Precision off band blocking Multi layers anti reflection coating Small spectral gap to minimize effect of light pollution More parfocal thickness 1. 9+
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