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Explore Scientific 1.25″ 0-III Filter for Astronomical Telescopes Unused BoxedClick images to enlargeDescriptionExplore Scientific 1.25″ O-IIIFilter for Astronomical Telescopes.This 1.25″ Explore Scientific 1.25″ O-IIIfilter for astronomical telescopes is mint, unused and in its original sales box.
One of the most important obstacles for the exploration of the night sky is the brightening of the night sky by artificial lights, such as streetlights. The night sky is not really dark in the vicinity of towns or cities, which reduces the visibility of objects beyond the solar systems enourmously. Depending on the type of the celestial object it is possible to increase the contrast dramatically byblocking the annoying artifical light.
TheEXPLORE SCIENTIFIC O-III filteruses a characteristic property of the so calledemmission nebulae. Those objekcts glow in special colors, the so called emmission lines. Those emmission lines are linked to chemical elements – in this case oxygen. TheEXPLORE SCIENTIFIC O-III nebula filterblocks all other colors (and thereby nearly all of the artificial light) andonly the two emmission lines of the oxygen can pass the filter. The result is astonoishing: suddenly nebulae are visible at locations that were completely empty without filters. In suburbian skies for example the veil nebula NGC 6992 is almost not visible with a 200mm telescope. By using this filter you can see the nebula and its structures without problems. A must for every visual observer.Serial # 0180
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Please see my other items listed.Terms of SaleAll items are described as accurately and honestly as possible. Returns will be accepted and a full refund (including postage) will be given should the item be not as described. Such a decision will have to be agreed with the seller first in those circumstances. If the item is found to be ‘as described’ but was purchased in error, returns are accepted,and the purchase cost of the item will be refunded. In such situations, no postage refunds will be issued.Pictures sell!
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Category: Cameras and Photography:Telescopes and Binoculars:Telescope Parts and Accessories:Filters
Location: Leeds, West Yorkshire