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The longer wavelength red light produced by our Night Reader is detected by the cone cells in your eye and does not deplete Rhodopsin in your rod cells
yet still suppresses light pollution well
Planeoptically polished
Off Axis Guiders have been around for a long time
Optolong L-Pro Filter for Deep Sky narrowband Imaging - 2" adapter The longer wavelength red light1. Optolong L Pro Introduction Optolong L Pro (L Professional) filter is designed to improve the visibility of various deepsky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i. e. skyglow). Together with
US$ 89.00
US$ 170.13
