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and most faint stars do not show up anymore
Do not worry about business increasing
Working current:＜15mA
420x160x83mm
framing large nebulae
Optolong OIII 25nm Filter 60 Pagers and most faint stars doThis premium Optolong Narrowband OIII filter is designed for nebula observation allowing 25nm bandwidth of light centred on a wavelength of 500nm through, which corresponds to OIII emission lines, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our
