Water lens research

Water lens, “triplet” for refractor telescope. March 2019          10,45 magnitude was reach Water lens, diameter 300mm, focal length 1000mm, 15 seconds exposure, ISO 12800, Canon 750D Photocamera took stars region 47 Boo, 44 Boo, HIP 74340 Februar 2019 Optical surfaces can by made by precision slumping glass method. Keywords: precision Glass Slumping, fusing glass, slump glass, Precision glass moulding, lightweight optics The Astronomical Observatory of Brera (INAF-OAB) is investigating a novel slumping technique for the manufacturing of stiff and lightweight optical segments. http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.726.1323&rep=rep1&type=pdf Januar 2019 was test water lens from glass and plexiglass with diameter 180mm,...