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using red and blue channels of Palomar Observatory Sky Survey II plates
Dubbelt fjäderbelastad för optimal användning med enhands grepp
Den består av fyra utbytbara vattenbehållare med olika form och ett stativ med visare som indikerar vätsketrycket
Steglöst variabel belysningsenhet
Setet innehåller sex olika filter i en trevlig och robust aluminiumväska
Aurora - Observing And Recording Natures Spectacular Light Show Size:EN STL using red and blue channelsThe uniquely beautiful light display of an aurora is the result of charged particles colliding with tenuous atmospheric oxygen and nitrogen, more than 60 miles above the Earth, when the magnetosphere is disturbed by changes in the solar wind. Aurora Observing and Recording Nature's Spectacular Light Show, Authors: Bone, Neil Often and incorrectly regarded as being confined to high northern and southern latitudes, major auroral displays are visible
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