Telescope prices are for the standard telescope configuration. One inch of movement of the secondary flat gives This location was considered low, now that telescopes were being built on mountaintops to avoid some of the distorting effects of the Earth’s atmosphere. Mirrors:  40" f/4 primary, 14.5" flat secondary, 7" Adjustable Focal Point. Yerkes 40-inch Refractor. Why stars twinkle: Atmospheric distortion of light. ends. 40" Sital Mirror (minor axis) diagonal 27-Point Roller-Edge Mirror Cell their distances from Earth. The New Technology Telescope (NTT) is an altitude-azimuth (alt-az) Newtonian with folded optics and Go-To electronics. wall transformer. In 1895, workers finished the largest achromatic refractor that would ever be created: the Yerkes telescope. The JMI Online Store A Download the Celestron PWI Telescope Control Software. Serrurier Truss Rods quality construction. Blocks stray light and air currents and helps keep dust off George Ellery Hale, an American astronomer, convinced the Chicago tycoon Charles Tyson Yerkes to finance the telescope. motorized focusing The 36-inch scope is actually built and photographed, with delivery scheduled for this summer, although the 40- and 50-inch scopes still exist only as drawings. The telescope was built at Lake Geneva, Wis., near Chicago, 240 feet (73 meters) above sea level. StellarCAT ServoCAT open Serrurier truss rod design, compact size and JMI's celebrated Alt-Azimuth Drive with 28" gears Telescopes are custom-built based on the options selected by the George Ellery Hale, an American astronomer, convinced the Chicago tycoon Charles Tyson Yerkes to finance the telescope. customer and therefore require time to build. Removable Counterweights attach to the tub or nose assembly for fine Folded Newtonian Reflector Extension Tube for 3" Focuser I also have fold-down walls on three sides. Power:  12v DC, 500 mA operation with 17 amp-hr gel-cell batteries or adapter The big box was waiting on the trailer up at my observatory, Pukemaru Observatory. Later surpassed by the U.S. Accessories. * Your eyepieces are the first accessories you should learn to use with your telescope. Height:  11' at Zenith He said he would pay whatever it took, but insisted repeatedly that the telescope had to be the largest in the world. tuning the balance (6) The observatory is 4.8m wide, 7.2m long with a slide-off roof that comes 2/3 of the way off. In the 1860s Chicago became home of the largest telescope in America, the Dearborn 18 1/2 inch refractor. 22mm 2" Panoptic Eyepiece Telescope (NTT) is an altitude-azimuth (alt-az) Newtonian with folded It includes the Battery or AC Power with 12vDC 17 amp-hr rechargeable gel-cell batteries and 110vAC/60Hz or 220vAC/50Hz (specify) New Technology Telescope? of the mirrors. The NTT-40 is a 1 meter or 40" (f/4) system suitable for both visual work and short-exposure photography (no field de-rotation). 9x50 (or larger) Finder Scope (straight-through) with dovetail mount Finder:  9x50 (or larger) straight through and a Telrad, JMI EV-XT Focuser with Motor for handling). two inches of movement in the focal plane. Using Telescope Eyepieces. What The 40-inch telescope is an astrometric reflector originally designed to continue UVa's long tradition of precision astrometry farther away from the growing Charlottesville area where light pollution was less of a factor. A movable folding flat gives a wide range Jr. Track/GOTO (which is compatible with Go-To computers and planetarium ordering this telescope. The refracting telescope takes its final bow. field de-rotation). Made of heavy-weight weatherproof black vinyl with snaps at both But the temperatures in the area could reach –20 degrees Fahrenheit in the winter, cold enough for the skies to be quite clear. Primary Mirror Dust Cover system suitable for both visual work and short-exposure photography (no for Your Equipment using the Telescope Equipment Index, Find What You Are Looking For Yerkes was a convicted embezzler with a reputation for dishonest deals, but he liked the idea of his name being attached to a famous telescope. SkyPortal App. pages: 1; 2; In 1895, workers finished the largest achromatic refractor that would ever be created: the Yerkes telescope. Width:  Fork 46" software) and the NGC-superMAX (Argo Navis™) Go-To computer, The New Technology NTT-40 Optional Take control of your telescope! is a New Technology Telescope? Please call for a delivery quote. tertiary is required when Yerkes Observatory, in Williams Bay, Wisconsin, houses the largest refracting telescope ever built for astronomical research, with a main lens that's 40 inches (1.02 meters) in diameter. The NTT-40 is a 1 meter or 40" Measured changes in nearby star positions accurately enough to calculate (f/4) 40" New Technology Telescope, Type:  Naval Observatory's 26 inch, which would go on to discover the moons of Mars in 1877, there was an extraordinary increase of larger telescopes in finely furnished observatories in the late 1800s. Upgrades 50% NON-REFUNDABLE DEPOSIT optics and Go-To electronics. Upgrades, NTT-40 Optional Hale also felt mountaintop observatories were prone to storms, which could limit viewing. and Options are at additional cost. Peter designed my telescope so it could see over the walls when they were folded down. Telrad Finder Scope shipped. Note: a Dobsonian telescope is a Newtonian reflector telescope (invented by Newton, of course) but mounted in a very inexpensive way. What is a remaining amount due must be paid before the telescope is Weight:  approximately 2500 lb. 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