Home Nikon 28-300mm f/3.5-5.6G ED VR . Ritchey-Chrtien telescopes are a type of Cassegrain telescopes designed to eliminate coma. Aberrations in Ritchey-Chrtiens In a classical Cassegrain telescope (another all-reflective design like the RC), the . SALE! A friend of Cave's, O. R. Norton, was invited over to see it and is . Telescope History. However, Ritchey-Chrtien telescopes can now be bought for reasonable sums made by a Taiwanese Company, Guan Sheng Optical (GSO). The f/10 focal ratio is classic when it comes to visual observations and planetary photography, and when it comes time to do some deep-space imaging, an optional focal reducer will effectively widen the field of view. The optical tube is just 406mm long with a diameter of 155mm . We were impressed with how easy the Astro Fi 6 SCT was to assemble, set up and use for a variety of purposes. StellaLyra 6" Classical . In this article I will show how it is possible for the ATM to make his own Cassegrain telescope. Available as a bare optical tube assembly or packaged with a variety of computerized mounts, the Celestron C6 Schmidt-Cassegrain (MSRP: $459.95) fills the gap between its 5 and 8-inch brothers. Let us now delve deeper to ensure you know exactly how they stack up and compare. Better still, it's one of the most . This scope is F/12 so you will see more of them both. Cassegrain telescopes on the other hand provide the same power and performance (Aperture) yet come in a more compact design yet tend to be more expensive. This is a Newtonian: This telescope uses a parabolic mirror and is relatively cheap to make. Telescopes with automatic object positioning . Classical Cassegrain optical design excels for high-power lunar and planetary observation and imaging.For our US and Canadian customers - http://bit.ly/2SPaX. Quartz mirrors, 2" dual-speed Crayford, V-style mounting bar, and dual finder bases. Precision 2 . 00. (905) 277-3044 kdel@interlog.com Build your own 12.5" f/15 Classical Cassegrain Dreamscope! Lunar eclipse. The Schmidt-Cassegrain Telescope, or SCT, is the most popular design in the broader catadioptric telescope line-up. Prior to the 2013 upgrade project, UBO housed two telescopes: a classical 16 inch diameter Cassegrain telescope that was used for spectroscopic observations, and a 14 inch diameter Schmidt Cassegrain Meade LX200R that was used for direct imaging. 3 easy payments of $233.33 With payment plan. Refractors Reflectors Stock & Pre-owned Latest updates. The RC is heavier than an SCT of the same size, which also made me opt for the 6 version instead of the larger 8 (13 vs. 19 lbs). About the Mount The new Advanced VX mount was specifically designed to provide optimum imaging performance for . Tube material: Steel Length of optical tube: 20.5 in. 4.3 out of 5 stars 11,426. Answer: They are fundamentally different telescopes, both in layout, optical principle, advantages and disadvantages etc. Direct comparison with a high-quality 6-inch ED refractor at magnifications ranging from 145x to 252x showed nearly identical detail on Jupiter. Sale price. With a tube weight of just 2.17kg, mount weight of 2.3kg and tripod at 2.3kg, each is just over a couple of bags of granulated sugar in weight. You can now buy Classical Cassegrain & Ritchey-Chrtien telescopes at FLO StellaLyra Classical Cassegrain & Ritchey-Chrtien telescopes Manufactured by Guan Sheng Optical in Taiwan. 2.1 Altazimuth (Alt-Az) Mount; 2.2 Leaner Mirrors; 2.3 Tube Frames; 3 Cassegrain . It's a compelling new offering for those wanting serious magnifying capability but in a compact form factor. Powerful and very user friendly with a 152mm aperture, 1500mm focal length, built-in rechargeable battery (10 hrs life ) and WIFI Remote control and viewing via smart devices. We don't know when or if this item will be back in stock. In my mind it was well worth the time and effort to build my firs t 12.5-inch f/4 f/16 Classical Cassegrain and 4.0 out of 5 stars 53. November 7, 2021 Leave a comment . Both have . Yann-Eric Boyeau - 105mm F/6. A 150mm, f/10 system, the telescope weighs just 8.6 pounds with a 630 finder and star diagonal attached. 1 offer from 499.00. 10. VAT) Altair 8" F5 . The Schmidt-Cassegrain optical design is ideal for imagers and visual observers looking for a telescope that is much more portable than the reflector or refractor. The Schmidt-Cassegrain has a folded optical system consisting of a primary mirror and a corrector plate with the secondary mirror right in the center. The tube that these mirrors originally housed in (and before you get too many ideas, this was DEFINITELY a homemade optical tube) was 24.15-inches L x 6.95-inches W. The placement distance the . Reach for a Star-Optics A division of KDEL ENTERPRISES 515 North Service Road, Ste.2403 Mississauga, Ontario, Canada L5A 1B3 ph. Cave favored large instruments, and to some extent is responsible for making amateur astronomers realize that they could move beyond the usual 6-inch reflector that was common at the time. Celestron 22087 NexStar 90 SLT Mak Computerised Telescope - Black. $3,499.00 SAVE: (%) Unit price. Catalin Beldea - 160mm F/6.5. Sold as optical tube assembly only, the Orion CC6 6" Classical Cassegrain Telescope comes with TWO dovetail finder scope bases, giving you the freedom to mount an optional Orion finder scope on either side of the focuser, or to mount a small guide scope and finder scope simultaneously. $3,499.00. Regular price. There are not ma ny amateur telescope makers (ATM) today who build Cassegrain telescopes. 6x30 finderscope to help accurately find objects. Product . Aperture: 152.4mm(6-Inch). These smaller instruments cost about $1000 per inch of aperture, while larger sizes cost about $2000 per inch. Share. Celestron 22204 5 Inch AstroFi Scmidt-Cassegrain Telescope - Black. I personally have not used the scope as . SkyWatcher S11510. The Cassegrain reflector is a combination of a primary concave mirror and a secondary convex mirror, often used in optical telescopes and radio antennas, the main characteristic being that the optical path folds back onto itself, relative to the optical system's primary mirror entrance aperture.This design puts the focal point at a convenient location behind the primary mirror and the convex . It will provide you with the most beautiful . That means the CC6 is easily supported on a modest-size mount such as the Orion Sirius EQ-G. / per. Celestron's premium StarBright XLT coatings. Weight, optical tube: 12.0 lbs. Next page. Focal Length: 1524mm. The Celestron 6-inch SCT Advanced . This design allows the telescope tube to be much more compact than a Newtonian reflector or a refractor. Classical Cassegrain optical design excels for high-power lunar and planetary observation and imaging.For our US and Canadian customers - http://bit.ly/2tizH. Camera & Photo Binoculars, Telescopes & Optics Telescopes Currently unavailable. Most telescope users are familiar with the Schmidt-Cassegrain design, a short-tube catadioptric that is that is quite popular among astronomy and astrophotography buffs. The AT6RC is the baby of the bunch, and with an entry price of only $399, putting it right next to similar sized Schmidt-Cassegrain telescopes from Celestron and Meade. However, there are interesting features of this design that makes it well worth investing the effort and money to build such an instrument. Add to Basket. Some have 96% and some 99% reflectivity mirror coatings . Meade LS 6-Inch SC (f/10) Schmidt-Cassegrain Telescope DealsDigital Camera Getting Suggestions - Making Sensible Buys On-lineFirstly , have to be completed is usually to make a decision this you are happy to dedicate to the digital camera along with follow it. A George Ritchey's 24-inch (0.6 m) reflecting telescope, the first RCT to be built, on display at the Chabot Space and Science Center in 2004. VIDEOS 360 VIEW IMAGES Celestron Astro Fi Telescope 6" Wifi 6" SC Visit the Celestron Store. The best telescope for a beginner in astrophotography is a small refractor. These claims tend to confuse the amateur astronomer into believing you must have 1/10 wave optics, when . I recently purchased the GSO 8 Inch Classical Cassegrain telescope - it is the same as the Orion 8 Inch Classical Cassegrain telescope. I will do a full revi. Specialized Cassegrain telescope. The New LT-6 is a fully featured computer-controlled 6" telescope that sets a new high-performance standard. STAR INSTRUMENTS continues to be concerned with the false advertising claims being made by amateur optical suppliers who claim 1/10 to 1/20 wave optics. This 12-inch Schmidt Cassegrain telescope features ultra-high transmission coating that will provide you with a much clearer image of different celestial objects. -Classical Cassegrain have a slight tad of astigmatism and coma very far from axis, so it's usually designed with a very slow f/ratio to mitigate that like f/18 to f/30. The 102 millimeter SkyWatcher S11510 (around $265) is a good choice for those looking for an affordable and portable scope. The 6 and 8 inch telescopes are mounted in solid tubes which can be either made of steel or carbon fibre. D=154mm / F=1848mm F/12 - MADE IN TAIWAN Telescope 42600 + 18% GST 6" f/12 Classical Cassegrain Telescope by GSO Cassegrain telescopes combine the benefits of a Newtonian telescope being a pure reflective system with a short-built design. Orion CC6 6" Classical Cassegrain Telescope. Orion's 6" f/12 Classical Cassegrain excels for high-resolution lunar and planetary viewing and imaging. Celestron C6-A SCT Optical Tube Features. Lightweight and versatile. Currently unavailable. A superb Classical Cassegrain design. With tube length of 21 inches, a 150mm (6) precision-polished fully multi-coated meniscus front lens, and solid uncompromising construction. Cassegrain telescopes are mainly used for photography of the moon . The second RCT was a 40-inch built in 1934 for the Naval Observatory and is currently at their Flagstaff Station. And I don't believe A. Jaegers manufactured cassegrain mirrors. In this article I will review the mid-sized 8-inch Cassegrain. VAT) Altair 6" F4 Photo Newtonian Telescope From: 389.00 324.17 (ex. Perhaps the most prominent feature of a Dobsonian is its Altazimuth . StellaLyra 10" f/12 M-LRC Classical Cassegrain Carbon Truss Telescope OTA. The image with both telescopes was crisp, well saturated with color and able to reveal delicate festoons in the now-yellowish Equatorial Zone. In 1949, Cave had produced a telescope for his own use - a 121/2-inch, f/11.3 giant. 4.4 out of 5 stars 2,104. For information about our current telescope please see here. StellaLyra 6" f/12 M-CRF Classical Cassegrain Telescope OTA (4) 459.00 Add to Basket. The Classical Cassegrain is known for its outstanding views at the eyepiece, giving APO refractor like views without the expense associated with a large triplet refractor. In terms of optical quality, Cassegrain telescopes are superior to customary Schmidt-Cassegrain systems. NGC-55. Explore the Universe and control your NexStar Evolution telescope with the free Celestron . 6" f/12 Classical Cassegrain Telescope by GSO Cassegrain telescopes combine the benefits of a Newtonian telescope being a pure reflective system with a short-built design. $699.99 . 32" and larger RCs are also available, although . 1500mm focal length (f/10) 25mm eyepiece (60x) Visual back allows for use with 1.25" accessories. Because telescopes magnify the image, they also . A Ritchey-Chrtien telescope ( RCT or simply RC) is a specialized variant of the Cassegrain telescope that has a hyperbolic primary mirror and a hyperbolic secondary . Astro-Physics 130 GTX - 130mm aperture, 780mm focal length f/6.3 triplet apochromatic refractor - $7,000. This innovative coating is made up of three different layers that greatly increase contrast and light transmission. STAR INSTRUMENTS guarantees a minimum of 1/4 wave front, 1/20 wave r.m.s. 12 offers from 78.67. The parabolic primary mirror, and hyperbolic secondary mirror combine to make the secret sauce that gives this design its optical advantage and prevents spherical aberration. The trouble with . The scope and lenses have been checked by Teeter's Telescope on 9/2015 and coatings are fine and exterior lenses were cleaned. It had a 24-inch mirror. VAT) Altair 8" F4 Photo Newtonian Telescope From: 499.00 415.83 (ex. Total Solar Eclipse. 1 Dobsonian vs Cassegrain Telescopes; 2 Dobsonian Telescopes. Classical Cassegrain optical design excels for high-power lunar and planetary observation and imaging Long focal length of 1836mm (f/12) "folded" into an optical tube just 20.5" long - so you won't need a giant mount! All models in stock! The central obstruction ratio is 33%25. VAT) Altair 8" F12 M-LRS Classical Cassegrain Telescope OTA 940.00 783.33 (ex. The 6-inch f/10 Schmidt-Cassegrain optical tube assembly, also known as the "OTA", is the smallest and most portable available in this design. May 2022 updates - CFF Telescopes Please read our summary containing valuable information - thank you! We don't know when or if this . Optics 150mm (6-inch) SCT compound telescope with StarBright XLT coatings Focal length 1,500mm, f/10 Mount Wi-Fi computerised altazimuth single fork arm Ports Power connector, two aux ports, integrated Wi-Fi adaptor, on/off switch Tracking rates Sidereal, lunar and solar Tripod Adjustable with accessory tray, including smartphone holder The Classical Cassegrain optical design utilizes a parabolic primary mirror and a hyperbolic secondary mirror, which for the CC6 allow a long, "folded" focal length of 1836mm in a tube just 20.5" long and weighing 12 lbs. The most common large sizes are about 20-25". Its legendary Meade optics either classic Schmidt- Cassegrain or our premium Advanced Coma-Free systems along with precision worm gear drives, sturdy die-cast aluminum mount and . StellaLyra 8" f/12 M-LRS Classical Cassegrain Telescope OTA (3) 879.00 Add to Basket. Read . Regularly $2500.00 now just $1799.00 USD plus s&h. Now is your chance to make the telescope you have always wanted. It has StarBright XLT coatings, which are the premium choice in this industry. Classical Cassegrain optical design excels for high-power lunar and planetary observation and imaging Long focal length of 1836mm (f/12) "folded" into an optical tube just 20.5" long - so you won't need a giant mount! Our 6" f/12 Classical Cassegrain excels for high-resolution lunar and planetary viewing and imaging, and will get you in close on tight objects such as globular clusters and planetary nebulas. Cassegrain telescopes are a type of reflecting telescope which utilizes mirrors as well as lenses. Celestron 22204 5 Inch AstroFi Scmidt-Cassegrain Telescope - Black 49.