100mm Ha Etalon Filter with B1800 for 2" Focuser - LS100FHa2/B1800 solar filters when it''s too dim to

when it''s too dim to use smaller binoculars

2x Barlow Lens - Insert the 2x Barlow Lens between the eyepiece and the telescope and it doubles the magnification of any 1

TeleVue had to go beyond the Barlow lens concept to achieve the goal of a compact

This skill

100mm Ha Etalon Filter with B1800 for 2" Focuser - LS100FHa2/B1800 solar filters when it''s too dim toAbout 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.