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TeleVue had to go beyond the Barlow lens concept to achieve the goal of a compact
Blackened lens edges and internal anti-reflection threads tweak the last bit of contrast for maximum image detail
About the Celestron 22 Lbs
The image color is a bluish white
100mm Ha Etalon Filter with B1800 for 2" Focuser - LS100FHa2/B1800 solar filters TeleVue had to go beyondAbout the Lunt 100mm Ha Etalon Filter w B1800 for 2" Focuser This product number is for the Lunt H alpha Single Pass Front Mount Etalon System for telescopes with 2" focuser and up to 1620mm focal length. Introducing the Lunt LS100 Hydrogen alpha System a 100mm aperture integrally tuned etalon for use on any customer supplied refractor. System includes the B1800 blocking filter which provides full disk images on telescopes up to 1620mm focal length.
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