Although a credit card number is taken at the time you enter your order information online, your credit card is not charged. Final payment by wire transfer will be required prior to shipping. Any of these scopes will show you countless lunar craters, Saturn's rings and a myriad of star clusters and nebulas! But after approximately 300x, theory breaks down and real world problems take over. The theoretical resolving power of a telescope can be calculated with the following formula: Resolving power (in arc seconds) = 4.56 divided by aperture of telescope (in inches). height: 200, That?s almost 33,000 times more light than what your eye can gather (assuming a dark adapted 7mm pupil). Capture breathtaking photos with our affordable astrophotography cameras. Referring to the manual is highly recommended. Mar 19, 2014 - 50 Inch Telescope at Mount Stromlo Observatory are not included, because Orion assumes the owners of these telescopes will have their own collection of favorite eyepieces. Great for families, young people, and folks who don't want to mess with equipment but just want to take a look. Refractors use a series of lenses to provide a clear image. by Mike Lockwood. Lastly, the biggest telescope we could find was this 65-inch aperture model from Canadian manufacturer Optiques Fullum. Thank you. This product is no longer available for purchase. Orion binoculars are known for quality optics at a great price. Referring to the manual is recommended. Glass with Pyrex or other low thermal expansion material will not change shape as dramatically during the cool-down period, resulting in more stable images during this period. Short focal ratios (f/5, f/4.5) produce wide fields of view and small image scales, while long focal lengths produce narrower fields of views and larger image scales. Level 4 Expert telescopes offer uncompromising optical and mechanical quality for the most demanding amateur astronomer. Because we sell direct, we can offer you tremendous value at a great price. Binoculars with larger objective lenses are recommended for low light situations, and binoculars with at least 50mm or larger objective lenses are recommended for pleasing astronomical observations at night. If a motor drive is attached to an equatorial mount, even a small lightweight mount is capable of capturing some planetary detail. Since 1975 Orion Telescopes & Binoculars has been offering telescopes for sale direct to customers. Advantages of f/4 This monstrous light grasp lets you capture some seriously faint objects and bring out the details other observers have only seen in photographs. So the larger the telescope's aperture, the more it is capable of resolving. Only one element of the optical system ? (1.3m) Astro-Research Astrograph. The "theoretical" limit generally is 50x the aperture of the scope in inches (2x the aperture in mm). And consider adding our email address ( to your email safe senders list, address book or contact list. Shipping is arranged by Orion, usually by air freight and in consultation with the customer. Refractor telescopes refract, or "bend" incoming light to a focus by means of an objective lens. Orion offers telescopes for every level: Beginner, Intermediate, Advanced, and Expert. The Orion 50" Dobsonian is the ultimate adventure in astronomy for serious deep-sky observers. The focal length is an inherent specification of a mirror or lens and is one of the factors in determining resultant magnification for a telescope (along with the focal length of the eyepiece being used). 65-inch: Optiques Fullum. Telescopes on either very lightweight mounts or non tracking mounts (such as Dobsonians) are capable of only very short exposures such as lunar photographs. This effect may not be noticeable at lower powers, but at higher powers the atmosphere will dramatically blur the object, reducing the quality of the image. So for example, an 80mm refractor is capable of 160x, and a 10" telescope is theoretically capable of 500x magnification. This is due to the fact that the exit pupil of the telescope (the beam of light exiting the eyepiece) is now larger than the average person's dark adapted pupil, and no more light can fit into the eye. Some customization options and installation services are available at an additional expense. This product is available to ship Standard delivery within the 50 US states, APO/DPO/FPO addresses and US territories/protectorates. Newton befestigte vor dem eigentlichen Hautspiegel als Objektiv einen kleinen um 45° geneigten Sekundärspiegel, der das Licht senkrecht zum Lichtweg ablenkte und damit eine seitliche … Cassegrain telescopes, such as Maksutov-Cassegrains, "fold" incoming light using two mirrors and a front "corrector" lens. You can view this category of porudcts by clicking on the product image or the button below. The Orion 50" Dob is the bigger brother of the Orion 36 and 40 inch Monster Dobsonians and is the biggest amateur telescope in the world. Argo-Navis(TM)* electronic setting circles with over 29,000 astronomical objects in the on-board database }, This product is no longer available for purchase. Apr 2, 2014 - 50 Inch Telescope at Mount Stromlo Observatory Cassegrain telescopes routinely use spheres in addition to other lenses in the optical path to correct for residual spherical aberration. so that collimation is maintained as you sweep across the sky. Lowest useful magnification is the power at which the exit pupil becomes 7mm in diameter. Some initial assembly may be required. May 19, 2016 - 50 Inch Telescope at Mount Stromlo Observatory Note that the formula is independent of the telescope type or model, and is based only upon the aperture of the telescope. the detection of NEO 2010 SV3 at unfiltered magnitude 24.0. They have exceptionally fine optics and mechanics. This is important to keep in mind when observing astronomical objects which require high resolution for best viewing, such as planets and double stars. .imagecenter {text-align: center;} Powers below this can still be reached with the telescope to give wider fields of view, but the image no longer becomes brighter at a lower power. to hear about our new products The limiting stellar magnitude is a measure of the faintest star you can see through the telescope. These scopes will appeal to the more technically inclined. Digital electronics are FCC Class B, CE Class B certified and fully RoHS compliant. If your passion is the deep-sky and you want the biggest Dob at the star party, this Monster Dobsonian makes everything else look puny. Your personal Orion Sales Representative can provide additional information. Not sure how to choose a telescope? At Orion we?ve known that bigger is better and have wanted to take the art of Dobsonian telescope making to new limits. A 75% down payment will be required to place your order. The telescope is designed to be light for its size and very stiff ? Concentrated sunlight from this much aperture can damage the telescope or set its surroundings on fire! Almost 2000 square inches of light-gathering power. When an item is not in-stock we will ship it as soon as it becomes available. Limited Warranty against defects in materials or workmanship for one year from date of purchase. Orion Dynamo Pro 12V Rechargable Power Station Orion's Telescope Buyer's Guide is a great place to start. This warranty gives you specific legal rights. As this is a custom built product the actual shipping date may vary. At Orion, we are committed to sharing our knowledge and passion for astronomy and astrophotography with the amateur astronomy community. Compare 50 inch telescope to discover the best deals and discounts now. Refractors use glass lenses to focus the light, and the glass material plays an important role in the quality of the resulting image. The Obsession 25 is considered to be the ultimate telescope for the serious deep sky astronomer who can afford the best. ARO 50 Inch Intermediate Level - These scopes offer higher performance and more advanced features than Level 1: Beginner models. That?s why we?re proud to introduce the new Orion 50" Dobsonian, a Monster Dob in a class by itself.

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