8 inch classical cassegrain telescope
The classic, 8-inch Schmidt-Cassegrain revolutionized amateur astronomy in the 1970s. 24 inch classical Cassegrain (currently being restored) 8 inch Meade Schmidt Cassegrain . NGC884 is part of the famous double star cluster in Perseus. A 16″ Schmidt-Cassegrain telescope on an altazimuth fork mount (credit: Meade Corp). Download the publication Celestron C-8 Telescope, the complete instruction manual which we include with the Celestar 8 and the Celestar 8 Deluxe telescopes. Found inside – Page 52-83Strain Gage Pressure Transducer 0-10 000 PSIS Taber Model 2105 or equal , quantity 8 units . ... The telescope is a 16 - inch classical Cassegrain or Ritchey - Chretien which includes a telescope control system compatible with the ATIS ... CCT-16. Orion CC6 6" Classical Cassegrain Telescope. Cassegrain Reflectors and Cassegrain Catedioptrics work in different ways, the former utilizes your classic Reflecting technology and mechanisms. . Meade LX200-ACF 8-inch Schmidt-Cassegrain The Meade LX200 range first appeared in 1992. Found inside – Page 10-14Both 1.2 - meter telescopes are classical Cassegrain optical systems , having parabolic primaries and hyperbolic secondaries . One telescope ( 829 ) has a back tocal distance of 29 inches , a relative aperture of f / 20 , and a focal ... A computer-controlled 8-inch Schmidt-Cassegrain Telescope (SCT) remains one of the most popular choices for amateur astronomers looking for a do-it-all telescope near the $2000 price point. Found inside – Page 24The author's homemade telescope , an 8 - inch classical Cassegrain on a German equatorial mounting . The primary mirror is f / 3.5 , and the secondary mirror magnifies the focal length to 2336 mm ( f / 11.5 ) . He is the president of Methodist College in Peoria, Illinois. He has played a key role in several observatory projects including the Powell Observatory in Louisburg, KS, which houses a 30-inch (0.75-m) Newtonian; the Naval Academy observatory with an 8-inch (0.20-m) Alvin Clark refractor; and he built the Coast Guard Academy Astronomical Observatory in Stonington, CT, which houses a 20-inch (0.51-m) Ritchey Chrétien Cassegrain. The image was obtained with only a 30-minute exposure, but I captured stars down to magnitude 18. The C-400 16" f/14 Classical Cassegrain is part of Takahashi's Observatory Series telescopes designed primarily for research and educational institutions. I bought the 6 inch StellaLyra CC telescope for portable visual observing at high magnification and small field of view, the choice being between a Classical Cassegrain or a Maksutov-Cassegrain. Also available for viewing, located in the roll-off roof area of the observatory, is a mounted 12-inch Schmidt-Cassegrain reflector telescope. Celestron’s Low Cost, Compact 70mm Travel Telescope Reviewed, Sky-Watcher’s 6-inch Dobsonian Telescope Reviewed, Unistellar eVscope 2 Smart Telescope Review, Askar Releases Its Largest Petzval Quintuplet Astrograph: FRA600, ZWO ASI2600MC Pro: A Premium One-Shot Color Camera Reviewed, QHYCCD Introduces Two Short-Wave Infrared Cameras, Chroma Narrowband Filters for Astrophotography in Light-Polluted Skies. The author's cat is reading the fine print on the bottom of the dovetail plate. The resulting system has less coma and diffraction . We now take a look at the upcoming 8" OTA of the Classic Cassegrain design soon to be available in the ASC inventory. . The Meade LX90ACF 8in Telescope with UHTC 0810-90-03 can do more than track satellites. Found inside – Page 60makes both telescopes and binoculars , including a well - supported series of Schmidt - Cassegrain design catadioptric telescopes . ... Parks offers a pair of 6 - inch reflectors ( $ 799 ) and an 8 - inch reflector ( $ 1,099 ) . These Baffle Systems Only Found In Higher Quality Telescopes. They are made by Guan Sheng Optical in Taiwan and are sold by Agena Astro, Astro-Tech, iOptron, Orion Telescopes, and Third Planet Optics (TPO). . Found inside – Page 46The result is a refractor with a much reduced secondary spectrum compared to one of classical design of the same ... Schmidt–Cassegrain and Maksutov–Cassegrain telescopes In the past couple of decades, the Schmidt–Cassegrain and its ... There is also a third variation called a Schmidt Cassegrain, which has become popular throughout the years with its combined system of refractor and reflector lens. I am a relative newcomer to astronomy and have used a 10 inch Newtonian with Dobsonian mount for just over a year (and loved it). The star diffraction spikes are a result of the telescopes spider vanes. 8-Inch Aperature. ♦ Focal length 2436 mm. With a focal length of 1836mm, it's ideal for crisp and razor-sharp visual observation and imaging. This is a single shot color camera with a built in guide chip. . Found inside – Page 12Although we thought it would be the second - largest amateur telescope in California when we planned it ... classical Cassegrain that gives a 6 - inch - diameter field of good definition for photography with the f / 8 secondary . Because of that, you will be able to have a clear view of many faint deep-sky objects as well as different objects in our planetary system. Celestron NexStar 8SE Schmidt-Cassegrain Telescope. Rs.2460, GSO 2x ED-Barlow-Lens (Multicoated) . And if a 10" Cassegrain is a little too big for your needs, we also have GSO 8-inch classical Cassegrains and 6-inch classical Cassegrains in stock. They ship through out India and I have purchased my 6 inch GSO Newt, 8 inch GSO Classical Cassegrain and iOptron CEM25P from them. . Meade LX-90 ACF 8" UHTC Telescope talks to them as well. . Because I planned to do a lot of imaging with this telescope, I decided upfront to upgrade to a JMI EV-1 focuser, which I consider one of the top focusers on the market. Detailing design methods for a variety of lens forms, this book shows that fixed focus and zoom lenses can be optimized, starting from plane-parallel surfaces, in a brief time on a modern fast PC compared to traditional tools that require ... 3000, 2 inch T-2 Camera Adapter . Due to the long optical train between the back of the telescope and the CCD camera, I had to attach a couple of one-pound counter weights to the objective end of the telescope to balance the telescope around the declination axis. The image captures the galaxyâs bright core and the bright oval ring surrounding the inner region of the galaxy. f8, 24 ft FL , . They were (are) research quality. The 125 mm field is fully shielded and unvignetted. Found inside – Page 37SchmidtThe Schmidt - Cassegrain Cassegrain telescopes are considerably less telescope , plenty of prone to these types ... The optical tube assembly A refractor can be a little cumbersome to of a typical 20 cm ( 8 - inch ) f / 10 SCT is ... Ritchey-Chrétien telescopes are the telescopes of choice for major observatory instruments. The 8" f/12 Classical Cassegrain Telescope features a machined, dual-speed (10:1) 2" Crayford focuser equipped with a sturdy linear-bearing mechanism for enhanced rigidity and stable support of heavy astrophotography equipment. 40mm Plossl Eyepiece 1.25" . Post-processed to include all the planets in one frame, this is the power of merely an 8 inch aperture size telescope, the Celestron NexStar 8 SE Computerized Cassegrain Telescope.The better you get at astrophotography, the better your images William Herschel's 40-foot telescope, also known as the Great Forty-Foot telescope, was a reflecting . Provides easy to understand information and guidelines about the design and construction of binoscopes Focusing on both homemade and commercial products, this book provides the reader with simple and straightforward information about the ... The both look pretty much the same â flat black interiors, baffled to improve contrast, identical secondary mirror cells and spiders. I will do a full revi. Ships from and sold by Orion Telescopes & Binoculars. A refractor telescope uses convex (bending outwards) lenses to collect, focus and magnify light. Image 2 - The author found the 8-inch classical Cassegrain telescope fit perfectly in his padded JMI case designed for an 8-inch Schmidt-Cassegrain telescope. The telescope is perfect for imaging star clusters, bright nebula and galaxies. . Rs. I should note this image was taken prime focus without the 0.8x focal reducer/field flattener. However, even with a 40 percent or greater central. Found inside – Page 501352 3-lens corrector by Wynne [4.14] [4.5 for the Kitt Peak 3.8 m, f/2.8 - f/8 RC telescope. ... 371 Three-element corrector for an f/2.00 to f/5.28 classical Cassegrain designed by Epps et al. [4.36 for a 300-inch telescope, ... . . 12 Inch Custom Dobsonian. Despite its long focal length, the optical tube of this . The 76mm field is fully shielded and unvignetted. This system also reduces the astigmatism and eliminates the diffraction spikes found in classical Ritchey-Chrétien designs. Order it now. Most SCs hold the secondary mirror in place . Found inside – Page 324... Coude spectrograph ; ( 2 ) installation of 12 x 15 - inch ruled grating in the 84 - inch telescope Coude ... telescopes have apertures of 36 and 24 inches , and two have 16 - inch apertures ; all have classical Cassegrain optics . This 30-minute exposure easily picked up the planetary nebulaâs 14.8 magnitude central star. To simplify accurate collimation, the primary mirror is fixed and only the secondary is adjustable. in the mid 1960s and are known for their fine optical and. Ships from and sold by Orion Telescopes & Binoculars. The Ring Nebula (M57) in Lyra is shown in Image 4. The Dobsonian and Cassegrain are some of the most popular types of telescopes. . Found inside – Page 275adopted until after 1950; many modern telescopes including the Hubble Space Telescope use this design, which gives a wider field of view than a classic Cassegrain. During the period 1850–1900, reflectors suffered from problems with ... Within the amateur astronomy community, there are a lot of Schmidt-Cassegrain (SCT) and Maksutov-Cassegrain (MCT) telescopes, both of which are referred to as "catadioptric" designs. A friend of Cave's, O. R. Norton, was invited over to see it and is quoted in the August 1994 issue of S&T: "I arrived at 265 Roswell Av and passed through the gate to the backyard - and into another world. Upon first glance at the design, the most obvious difference between a Classic Cassegrain (CC) and a Schmidt-Cassegrain (SC) is the lack of a corrector plate in front of the tube. Elevation about 1400' 10000 Skyline Blvd. Copyright © 2021 Astronomy Technology Today. Significantly quicker temperature adaption than a SC, due to open design. . M77 also has a faint outer ring surrounding the galaxy that was captured by this eight-inch astrograph! 2100, Photo taken by Mr. Shivam Bansal from Agra, 8" f/12 Classical Cassegrain Telescope by GSO, Open Optical Tube System Prevent Dew Formation Thus Eliminate The Requirement Of Dew Shield. CCT-32. Click here to get these deals which only will be available for a very limited time. Or, for an even better deal, we are offering 2 years for only $9. • Both primary and secondary mirrors have a near zero expansion substrate. in the mid 1960s and are known for their fine optical and. The Dall-Kirkham Cassegrain with its F/20 focal ratio and smaller central obstruction is perhaps the ultimate high magnification visual planetary telescope. Astronomics is a family-owned business that has been supplying amateur astronomers, schools, businesses, and government agencies with the right optical equipment and the right advice since 1979. Direct comparison with a high-quality 6-inch ED refractor at magnifications ranging from 145x to 252x showed nearly identical detail on Jupiter. No competing Schmidt-Cassegrain Telescope can make those claims. Found inside – Page 271-6 , 8 ] All of this photometry was performed with B , V , R , and I filters and reduced to the standard Johnson system ... which houses a 20 inch ( 51 cm ) aperture f : 10 Classical Cassegrain telescope on a massive German equatorial ... . The Hubble Space telescope is a RCT. Orion SkyQuest XT10 Classic Dobsonian Telescope. With or without a focal reducer/field flattener, the images are flat and aberration free. This is a Newtonian: This telescope uses a parabolic mirror and is relatively cheap to make. . telescope, complete with the original German equitorial. No competing Schmidt-Cassegrain Telescope can make those claims. 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. In stock on June 26, 2021. Unlike the average telescope, this one is compact and can be carried around and packed away more easily. Copyright © 2008 - Tejraj & Co. All Rights Reserved. . Likewise, Saturn presented an impressively sharp and pleasing image, the Cassini division wrapping the full circumference of the planet, and subtle belt and zone detail being just a bit less visible than with the 6-inch refractor. George Normandi. Found inside – Page 39It will outperform Schmidt-Cassegrains and Maksutov-Cassegrains of 8-inches aperture, and on occasions, it has provided better images of Mars obtained with my own 16.5-inch DallKirkham Cassegrain. Compact tube with only 500 mm length - can be operated with smaller mounts. Rs. The basic 8-inch RCT comes with a steel tube. Found inside – Page 386The CTIO 0.9m is a classical Cassegrain . The 4 - meter telescopes both have doublet field - correctors . The USNO 0.2m ( 8 - inch ) astrograph has a 5 - element lens which is designed for a go flat field of view for photographic plates ... Pure reflection system without Schmidt plate, as a result even Infrared photography becomes possible at full sharpness. . This item: Orion CC8 8" f/12 Classical Cassegrain Telescope $999.99. The 6" stationary primary mirror - made from thermally stable quartz -- won't exhibit image shift or mirror flop like in a typical . Additionally, this telescope can capture 8-inch telescope images with one single snap. . Quote: > out there. I have for sale a Tinsley Labs 8-inch Classical Cassegrain. . However, the scope’s image was no brighter than that of the 6-inch refractor. I ordered the third 20-inch telescope they made. This cluster contains myriad orange and red stars. Generally speaking, these are fast telescopes (focal ratio between 3 and 8 appro. Rs. Cave made cassegrain mirrors, but I didn't think they went down to a 6-inch size. The Kohl Telescope is a 20-inch classical Cassegrain reflecting telescope that was built by DFM Engineering in Colorado. . I finish the temporary set up with the new classical Cassegrain 8″ telescope in tandem with my Ritchey Chrétien 10″. . In a world abundant with Schmidt-Cassegrainian telescopes (SCT), the GSO (Guan Sheng Optical of Taiwan) 8-inch offering (MSRP: $899) is throwback to the all-mirror classical Cassegrain design that uses a parabolic primary and hyperbolic secondary.Decades ago, this configuration was a favorite of many dedicated lunar and planetary observers. These claims tend to confuse the amateur astronomer into believing you must have 1/10 wave optics, when . The telescope came with a tube cover, a GSO two speed focuser, one 2-inch extension ring, two 1-inch . The overall focal ratios are f/7 to f/9, much faster than classical Cassegrains. We have four difference versions and dimension to fits with difference refractor and Schmidt-Cassegrain telescopes. Found inside – Page 35Performance Sidgwick mentions in his classic tome Observational Astronomyfor Amateurs, “Regarding type of instrument, ... rapidly” as one moves from a 3-inch to 8-inch (80 mm to 200 mm) size.18 Other respected authors, such as Roth, ... And I don't believe A. Jaegers manufactured cassegrain mirrors. Found insideThe advantage for this design is a large aperture that's relatively portable: I can easily sling my 8-inch (20-cm) Schmidt-Cassegrain telescope (SCT) and tripod mount in the back of my Fiat 500 (a tiny Euro car) for a night of observing ... The scope was an immediate success, offering high quality optics in a compact package that was reasonably affordable. This 8" f/12 Cassegrain from GSO is a modern take on the classical Cassegrain design. In this article, I review the GSO 8-inch GSO Ritchey-Chrétien. An 8 telescope, also known as an 8-inch telescope, allows the viewer to see astronomy with the touch of a button. IC4278 is the fuzzy object to the left of the M57-NGC5195 pair. Rs 2640, GSO 6x30 Straight finder . Also in the image is IC4278, a 17th magnitude elliptical galaxy. . No hints of field curvature or coma appear in the image. Since I was purchasing a motorized focuser than can be programmed to adjust the focus as the temperature dropped, I opted to buy the steel tube version of the RCT. Image 2 shows the inside of the GSO RCT (left) compared to the inside of the GSO classical Cassegrain (right). Rs. . 1650, Carry Bag EXOS-II Stand . No competing Schmidt-Cassegrain Telescope can make those claims. 2100, 9 mm Plossl Eyepiece 1.25" . . I currently have the telescope mounted on a Software Bisque Paramount MyT German equatorial mount in a Sky Shed Pod just outside of Peoria, Illinois. The mount, focuser and CCD camera are controlled by a laptop computer inside the dome, which I can control remotely. The Meade LX90-ACF 8" has an 8" diameter f/10 ACF optical system (focal length 2000mm) and Ultra-High Transmission Coatings (UHTC) for . Sign up with your email address to receive news and updates. . Price $ <100 $$ 100-200 $$$ 200-500 $$$$ 500-1000 $$$$$ 1000> Our Review - A link to the . Unlike classical Cassegrains, RCTs do not have parabolic primary mirrors, but hyperbolic mirrors. My main imaging camera is an SBIG ST-2000XCM. Rs. 3000, GSO SuperView 30mm 2 " Wide Angle Eyepiece . Rs. Learn more about the GSO 10" Classical Cassegrain at this link. . Found inside – Page 2048 - inch f / 6 Newtonian by Cambridge Astronomical Telescopes , s / m RA and Dec. , German equatorial , 14 - inch S / S axes , fibreglass tube cell and flat , aluminium castings mount ... 8 - inch f / 15 classical Cassegrain optics . Found inside – Page 30The secondary is 8 - inches in diameter , 1inch thick , with an overall effective f - ratio of 8.0 . The configuration and figure of the mirrors are classical Cassegrain . ii ) Mount a case can Both equatorial and non - equatorial ... Epsilon Bootis, Delta Cygni, the Iota Cass trio, and even the seeing-hampered Antares resolved nicely into concentrated pinpoints, only marred slightly by the unavoidable spider diffraction and secondary obstruction. . The incoming light… Found inside – Page 38If a Ritchey - Chrétien telescope has only a classical f / 8 Cassegrain , it will be impossible to detect the extended ... such an instrument at the Cassegrain focus of the 82 - inch ( 208 cm ) McDonald telescope ( Meinel 1956 ) . You can get a 5% discount at Tejraj - click here to get my affilialte code. 2100, 4 mm Plossl Eyepiece 1.25" . Found inside – Page 26The collimation of Newtonian and classical Cassegrain telescopes is within the abilities of anyone . ... The typical central obstruction of an 8inch Schmidt - Cassegrain ( S - C ; also " SCT " ) from either major manufacturer is 35 ... A Ritchey-Chrétien telescope (RCT or simply RC) is a specialized variant of the Cassegrain telescope that has a hyperbolic primary mirror and a hyperbolic secondary mirror designed to eliminate off-axis optical errors ().The RCT has a wider field of view free of optical errors compared to a more traditional reflecting telescope configuration. Rs. To start you off right, Meade is including two 1.25" eyepieces (a 26 mm and a 9 mm Super Plossl) as well as an 8 X 50 optical finder with the LX85 package. / mechanical properties. 12-Inch Alvan Clark Telescope Restoration: Summary of Research and Final Recommendations Deborah Culmer and Hannah Johnson September, 2011 Introduction The first telescope installed at Lick Observatory was a secondhand purchase, with the - telescope and its optic made by the premier telescope makers of the time, Alvan Clark and
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