WebMirrors of the Self and the Sacred: Transculturations of Obsidian in the Sixteenth Century Hispanic World. Ricardo Padrón (Virginia) ... Insitute of Historical Research Secondary Navigation. About Us; Seminar Series; What's On; Library; Podcasts; The Institute of Historical Research (IHR) Senate House Malet Street London WC1E 7HU. Subscribe; WebMy name is Donagh Corby, and I am an award-winning sports & entertainment journalist and media professional from Dublin. I provide various media solutions to clients such as marketing companies, charities, global education funds and new media outlets. I have worked with people across the world to help keep their operations running smoothly …
Offsetting Your Secondary Mirror - Sky & Telescope
WebSometimes referred to Secondary, diagonal or flat mirrors, these mirrors are measured across the smaller 'minor' axis. Please see our Primary Mirror Coating page for more … WebFIGURE 174: Schmidt-Cassegrain telescope is a Cassegrain-like two-mirror system combined with a full-aperture Schmidt corrector.Various combinations of corrector separation and mirror conics are possible, with … mayo clinic bmi calculator for women
How to clean a reflector telescope - BBC Sky at Night Magazine
Web17 Jul 2006 · If you place the secondary centered in the telescope tube, with the primary mirror's optical axis at the center of the diagonal mirror's elliptic face, diagram A (greatly exaggerated for clarity) shows what will happen. The shaded area shows where light from the whole primary can be seen reflected in the secondary — at the focal plane, this defines … Web14 Dec 2024 · First, make sure the secondary mirror is aligned as in the above image. Your secondary is aligned if you can see the entire primary mirror with an even ring of the tube walls around it. Next, you must align the primary. To align the primary, adjust the three collimation bolts until you have a view looking like this: The secondary should be ... WebSecondary navigation. Shop; Search; Donate; Hide menu mirror. Object Type mirror. Museum number 1814,0704.921. Description Bronze mirror incised with a winged Lasa holding an object; cracked at the top. Cultures/periods Etruscan. Production place Made in: Italy. Materials bronze. Technique incised. Dimensions ... hertz out of hours number