Hello!! It's Joseph

  HoverGrid™ frames are interlocking assemblies that, when joined together, form a rigid grid-work for attaching LCDs. Frames interlock vertically, up to eight monitors high, and horizontally as many monitors as you wish. The HoverGrid™ system comes with individual model-specific frames, a choice of 1, 2 or 3-wide overhead rigging beams, shackle suspension mounts and joiner brackets, back-braces and quick-connect aircraft pins. DMX-512 Winch Wahlberg winch CueLUX from lift-it   better practice is to use swivel hoist ring:  

  tokosigma Matrox Extron

 2022年7月 青雲山莊 Google maps 觀星勝地，一去不返 玉皇頂   Enorth 燕晗山

 single image stack of 8 minutes with AS3! sunspot AR16032 is visible a bird fly by (is it ISS?)

To locate when ISS passes above you, use these   Transit-finder   Heavens above N2yo  Celestrak SubGP is very accurate, and provides TLE in 6 hour segments, and you can use simulator to visualise ISS ID: 25544  CSS TianHe Norad ID: 48274 Beebottle using celestrak data and python ESA should be most accurate, but only shows + or - 1.5 hours. so BE prepared to re-position the latest path ( takes a few seconds to refresh) spotthestation for Hong Kong trajectory data Kibo  forecast for Japan area only  Chinese Space Station, Tiangong  3 Aug 09:04 CSS Sun transit over Hong Kong, quite BIG difference in predictions, so don't have high hope on this rare event Orekit and forum talking about ISS pass in perl Sourceforge  by Ed Morana

 

  Romans made vessels by glass blowing  starting 1st century AD 1185 first spectacles appeared The Venetian industry exported its mirrors to royalty and private bourgeois clients across Europe in the late 1500's and 1600's galerie de glaces. Hall of mirrors in Palace of Versailles were constructed under the order of Louis XIV 1678-1684 a brass-decorated telescope ( magnifying glass?) was among objects bequeathed by a Spaniard, Don Pedro de Carolona , to his widow in Barcelona in 1593. Nick Pelling (controversial) 1608 Dutch optician Hans Lipperhey attempted to patent the first telescope  Ippolito Francini , Galileo lens maker, make the first  lens grinding and polishing machines 1612 Johannes Kepler designed the Keplerian telescope, convex objective and concave eyepiece, inverted image 1630 Jesuit Christoph Scheiner also made telescope according to Keplerian , and observed sunspots 1655 Dutch Christiaan Huygens built according to design of Kepler, discovered Titan, ...

 in Pegasus, NGC7784 NGC7786 IC5367

12 Jul 2022  first open deep field image from JWST, using NIRCam, SMACS 0723, near southern constellation Volans   bigthink Uranus rings

  small constellation near Aquila and Cygnus

intro  versions: review: from robertstech, version 3 is best of first 3 versions , version 6 is with apochromatic element  pentaxforum kenrockwell camera-wiki  mflenses sticky iris repair   repair manual alexluyckx  robertstech

  喔㕭文化（越南語：Văn hoá Óc Eo）是1世紀至7世紀的扶南王國時期分佈於越南南部的高棉文化，由法蘭西人考古學Louis Malleret 所發現。喔㕭（越南語：Óc Eo，高棉語：អូរកែវ O'keo ，意為「寶石河」）是古扶南國的繁華的港口，其遺址位於越南安江省南部湄公河三角洲地區的瑞山縣。   Oc Eo, sometimes spelled Oc-Eo or Oc-èo, was a large and thriving port city located in the Mekong Delta on the Gulf of Siam in what is today Vietnam. Established in the first century CE, Oc Eo was a critical node on the international trade system between Malay and China.  The Romans knew of Oc Eo ( golden peninsula, Chersonesus Aurea?), and the geographer Claudius Ptolemy included it on his world map in 150 CE as the Kattigara Emporium( Captial of three rivers), Hac Thanh. TBC Funan Culture 扶南 Oc Eo was part of the Funan culture, or Funan empire, a pre-Angkor society based on international trade and sophisticated agriculture built on an extensive network of canals. Trade goods flowing through Oc Eo came from Rome, India, and China.   Timeline of the Vietnam War Surviving historical records about Funan 扶南 a...

 from Canon, Blue spectrum refractive optics BR optics is based on a new organic optical material, developed by reexamining lens material from its molecular structure. This new lens material features unique anomalous dispersion characteristics that are capable of greatly refracting blue light (short wavelengths spectrum), which has traditionally been difficult to focus on a single point. Incorporation of a BR lens, consisting of BR optics sandwiched between concave and convex glass lenses, makes it possible to control the path of blue light (short wavelength spectrum), producing clear, sharp images by thoroughly reducing chromatic aberration. Nikon also introduced Nikkor z 400mm f/4.5 VR S telephoto lens with SR lens: The lens is constructed of 19 elements in 13 groups, including one Extra-low Dispersion (ED) element, two Super ED elements and one Short-wavelength Refractive (SR) lens element. The SR element refracts blue light more than green or red, helping to control longitudina...

清代朝廷接受了 汤若望 的建议，改用欧洲天文学的方法计算历书；后康熙授命 南怀仁 设计和监造了6架新的天文仪器(1673)：赤道經緯儀、黃道經緯儀、地平經儀、象限儀、紀限儀和天球儀。 They were duplicates of Tycho's Uraniborg instruments copied from the Mechanica Ferdinand Verbiest obligingly provided a detailed set of 117 engravings and text, which included the main processes of workshop manufacture. 康熙五十四年（1715）纪理安设计制造了地平經緯儀，乾隆九年（1744年），乾隆又下令按照中国传统的浑仪再造一架新的仪器，命名为 璣衡撫辰儀 赤道經緯儀, 或渾天儀 Equatorial Armilla 觀測天體的赤經赤緯 真太陽時   黃道經緯儀 Ecliptic Armilla, or zodiacal sphere 觀測天體的黃經黃緯 節氣. 有  鉛垂線定垂直   象限儀Quadrant 觀測天體的地平高度   地平經儀 Alzimuthal horizon 觀測天體的地平經度   紀限儀 Sextans trigonicus 觀測兩顆行星(恆星?)之間的夾角， 精度可達六角 秒(transverse scale) 地平經緯儀 Azimuth theodolite, or quadrant 觀測天體的地平經度和緯度     璣衡撫辰儀 JiHeng Armillary Sphere, or equinoctal sphere 改進的渾儀 觀測天體的赤經赤緯 天球儀 Celestial globe 玲瓏儀 簡儀, equatorial torquetum 康熙憑此引入西方科學(science)，制造科技(technology)，照理可為古中國可帶來一次科技革命。似乎集中在軍事火炮上的制造。 bjp laitimes   sohu   baike sohu 2   龍岭迷窟中的渾天儀 古天文成就展 361  介紹 斜線刻度 transv...