For designated lunar and planetary observations. Barrel diameter: 1.25 Levenhuk 1.25 Optical Filter 21 (Orange) is superb for observations of the solar method planets and their satellites. With this filter you'll be capable to gain knowledge of the tiniest details of observed celestial objects. Levenhuk 1.25 Optical Filter 21 (Orange) blocks blue-green parts of the spectrum and transmits up to 56% of visible mild. This filter has a barrel diameter of 1.25 so it may be with telescopes of any manufacturer. Necessities: mild transmission, %: 56 Eyepiece holder diameter, in: 1.25 advocated telescope aperture: medium and big (at the least 200 mm) 6 months confined assurance
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