Enhanced aluminum coatings for the Parallax Instruments PI370C 14.5" Classical F/15 Cassegrain Telescope are available for an additional $320. The picture below is for testing in my observatory on my CGE Pro mount. An Introduction to Astronomical Photometry Using CCDsBy W. Romanishin We offer several other cassegrain telescopes, many of which are described in these videos:Overview of the Orion 180mm Maksutov Cassegrain Telescopehttps://www.youtube.com/watch?v=ZQICj5_6FjkOverview of Orion 150mm Maksutov-Cassegrain Telescope Optical Tubehttps://www.youtube.com/watch?v=Y4LFN-9C-cIOverview of the Orion StarSeeker IV 127mm GoTo MakCass Telescopehttps://www.youtube.com/watch?v=Mdjr8xSHGRcFeatures of the Orion Starseeker IV 150mm GoTo Mak Cass Telescopehttps://www.youtube.com/watch?v=HpnOEzq8qUsOverview of the Orion StarSeeker IV 102mm GoTo MakCass Telescopehttps://www.youtube.com/watch?v=ClRZLONVzcs\u0026t=2sView our complete selection of cassegrain telescopes:http://bit.ly/2IblGIZTo be notified when new videos are added to our growing library of stargazer how-to videos, subscribe to the Orion channel!http://www.youtube.com/user/oriontelescopes/Visit https://www.telescope.com to find high quality products for amateur astronomers.If you have any questions about any of our telescopes, binoculars, or accessories, please don't hesitate to contact one of our trained and knowledgeable customer service representatives. / The enhanced aluminum coating delivers 96% reflectivity, and a protective quartz overcoat protects the finish. . Rs. . 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. The author's cat is reading the fine print on the bottom of the dovetail plate. . 2100, 4 mm Plossl Eyepiece 1.25" . Cassegrain telescopes are mainly used for photography of the moon and the planets and for observation of astronomical objects. . . Quote: > out there. Rs. If the idea of a long focal length telescope for high-power visual pursuits or for lunar or planetary photography sounds like fun, get your hands on the Orion CC6 6" Classical Cassegrain Telescope today. mount and clock drive. . $109.99 $ 109. Found inside – Page 46True apochromatic refractors are very much more expensive, crossing the $10 000 price tag for a 5- or 6-inch refractor. ... Schmidt–Cassegrain and Maksutov–Cassegrain telescopes In the past couple of decades, the Schmidt–Cassegrain and ... Found inside – Page 27( 4 ) Suspected a 13.7 star ; telescope was 6 - inch Dynascope , but " with dusty prism , dusty diagonal , dusty eyepiece ! ... MAKSUTOV CASSEGRAIN REFLECTORS F : 23 Design by J. F. Gregory F : 15 Dall - Kirkham itself , did not carry ... Neptune's disk is visible at 200× through a 6-inch telescope on a night of steady seeing. Found inside – Page 102Getting the Most from Your Schmidt Cassegrain or Any Catadioptric Telescope Rod Mollise. terminal case of the shakes. ... The 6-inch optics are every bit as good as those on big sister, but come in a somewhat more manageable package. 3000, GSO SuperView 30mm 2 " Wide Angle Eyepiece . This article will feature a 12.5 inch Classical Cassegrain with parabolic primary and hyperbolic secondary Advantages and Disadvantages of the Cassegrain The advantage of the Cassegrain is that it allows for a long focus telescope in a relatively short tube. . There is no pesky chromatic aberration since there are no lenses as in a refractor.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 to be tucked into a tube just 20.5\" long (including focuser). Celestron Edge HD 8 review. . Found inside – Page 72The 6-inch Dobsonian is the classic beginner's telescope, capable of revealing terrific detail on the Moon and planets and affording pleasing ... If portability is paramount, the Meade ETX 90mm Maksutov-Cassegrain is a good choice. Schmidt Cassegrain telescopes consist of big apertures. Found inside – Page 216Telescopes come in several basic designs: refractor, reflector and Schmidt–Cassegrain. ... XT 4.5-inch (114-mm) Classic Dobsonian reflecting telescope ($240) • Orion SkyQuest XT 6-inch (150-mm) Classic Dobsonian reflecting telescope ... stroke length grinding stand concave convex mirror blanks turned down edge turned up edge shadow test spherical aberration 3 out of 4 ( 75%) reviewers recommend this product. Rs. . 99. . Rs. Close-up of chart showing Neptune's path on the sky in 2021-2022. In fact, it's bright enough to stimulate color vision through any telescope with 4 inches (100 mm) of aperture. . 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. . This means the optical performance of RCOS telescopes are maintained over any temperature excursion. A V-style dovetail mounting bar affixed to the optical tube allows its attachment to any telescope mount equipped with a compatible saddle plate. Buy maksutov cassegrain telescopes at Astronomics. Keller Telescope - 16 inch f/11 Ealing classical Cassegrain telescope. They stock equipment from a wide variety of brands like Explorer Scientific, GSO, iOptron, Bresser, William Optics, Orion and Meade. 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. This telescope offers views that rival apochromatic refractors at a tiny fraction of the price. 6" aperture, 1836mm focal length, f/12 focal ratio. The LX85-ACF incorporates a revolutionary optical design that creates coma-free, pinpoint star images and a flat field that experienced astrophotographers and many observatories require. That compact tube, which weighs just 12 lbs., means the CC6 is easily supported on a modest-size mount such as the Orion Sirius EQ-G, even when equipped for photography with an extension ring and optional finder scope and imaging camera.Both mirrors are made from quartz and can take a very fine polish. in the mid 1960s and are known for their fine optical and. Look for a hue quite similar to Uranus's, though somewhat bluer. . 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. The advantages of GSO Cassegrain Telescopes in summary: Cassegrain Optics are versatile Telescopes, Cassegrain optics with parabolic primary and hyperbolic secondary mirror, 2" Crayford focuser with micro-gear reduction. Rs. Parallax Instruments Product Number: PI370C. focal length shadow appearance inside focus outside focus zonal measurements light beam light source dog biscuit spider web Found inside – Page 7810-inch, 12.5-inch and 16-inch Cassegrain reflectors; 4-inch and 6-inch achromatic refractors. ... Instruments Atlanta, GA Models: custom-made achromatic refractors from 5-inches to 12-inches aperture in classic-style brass tubes. 4800, GSO SuperView 42mm 2" Wide Angle Eyepiece . . . This 6" f/12 Cassegrain from GSO is a modern take on the classical Cassegrain design. From our entry level beginner telescopes for amateur astronomers to our Dobsonian telescopes to our most advanced Cassegrain telescopes and accessories, you can find the best telescope for you. 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. Found inside – Page 144The Amateur Astronomer's Guide to Choosing, Buying, and Using Telescopes and Accessories Philip S. Harrington. The Classical ... These include four Classical Cassegrains, ranging from the 10-inch f/15 PI250C to the 20-inch f/16 PI500C, ... Expires: N/A. The Omegon Cassegrain telescope is a master photographer of the night sky. Rs.5700, ED 3X Barlow Lens GSO 1.25" . Because of its slow focal ratio, the Classical Cassegrain in not usually employed for deep-sky CCD imaging, although it is possible to design a Cassegrain with a faster focal ratio (f/8 or so). #25 / 33. 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. Found inside – Page 175For movable telescopes, the optical design basis remains the Cassegrain telescope, either in classical or RC forms. ... He made a 6-inch mirror consisting of a central disk, axially adjustable, surrounded by a ring 1: inches wide. With an eyepiece of 8mm you will be able to get 595 power!. Despite its long focal length, the optical tube of this . The primary mirror, an 0.5 m aperture f/3 parabola, consists of a light-weighted Schott Zerodur blank polished to lambda/4, coated with a standard Al/MgF 2 coating. The 61-cm Seyfert telescope has an interesting convertible design, so it can be used as a classical Cassegrain or as a Baker reflector-corrector wide-field photographic telescope. . . Experience our celestron cassegrain telescopes, including our wonderful nexstar evolution 8 hd with starsense & more available today at ontario telescope! . He achieves this through a series of worked examples and short project walk-throughs, detailing the equipment needed – starting with just a DSLR (digital single lens reflex) camera and tripod, and increasing in complexity as the book ... The 8 inch dob is a good all round scope with more light gathering power while the cassegrain will be more suited to planetary or small dsos due to the slow focal ratio but with a physically smaller size. 6-Inch Primary Mirror. > obstruction, a 20-inch instrument would give decent planetary. Rs. Rs. Despite its long focal length, the optical tube of this . Unlike catadioptric designs (SCTs, Maksutovs, etc.) silicon carbide pitch squares optics testing equipment pinhole testing and correcting turned edge oblate spheroid ellipsoid Cassegrain telescopes are great optical performers, and offer a variety of designs for any use. . Found inside – Page 52-830-6 000 PSIS Taber Model 2105 or equal , quantity 10 units . ... The telescope is a 16 - inch classical Cassegrain or Ritchey - Chretien which includes a telescope control system compatible with the ATIS language , a four port computer ... Found inside – Page 718... a 15-cm (6-inch) telescope that fits into a jacket pocket; and the first bicycle crossing of the uninhabited central ... form of the widely-used Cassegrain reflector, which is easier to make than the classical Cassegrain design. A major feature of this book is the way it compares not only different classes of refractor, but also telescopes of each class that are sold by various commercial manufacturers. Cave made cassegrain mirrors, but I didn't think they went down to a 6-inch size. 19 Used - 0 Today; Share. The Omegon Cassegrain's primary mirror is parabolic and the secondary mirror has a hyperbolic shape. Found inside – Page 64... mm ( 2.4 inches ) 90 mm ( 3.5 inches ) 12.5 cm ( 5 inches ) 15 cm ( 6 inches ) 20 cm ( 8 inches ) 25 cm ( 10 inches ) ... 5.5 Types of telescopes Refractor Newtonian ( Classical ) Cassegrain 64 Telescope optics 5.5 Types of telescopes ... . As Rick Blakley at NOAO kindly pointed out, this is distinct from the better-known Baker-Schmidt design, incorporating a doublet and . 2460, 15 mm Plossl Eyepiece 1.25" . . . . zones test mask grinding grit micron powder wet grinding stand tool plate glass pyrex astro sitall astrositall sagitta abrasives The Kohl Telescope is a 20-inch classical Cassegrain reflecting telescope that was built by DFM Engineering in Colorado. Orion CC6 6" Classical Cassegrain Telescope. Rs 2640, GSO 6x30 Straight finder . A 6-inch Newtonian reflector. . And I don't believe A. Jaegers manufactured cassegrain mirrors. That means the CC6 is easily supported on a modest-size mount such as the Orion Sirius EQ-G. The scope can also function as a nice f/4 rich field telescope with the addition of a . Parabolic primary mirror: Polished to diffraction-limited or better surface accuracy. The weight is even less than my 15 cm refractor and my old Maksutov: just 7.5 kg. The 6" stationary primary mirror - made from thermally stable quartz -- won't exhibit image shift or mirror flop like in a typical . . Go To Store. that move the primary mirror to focus (which can lead to image shift as the mirror moves . . Found inside – Page 70It provides observers with a worthy successor to Aitken's out-of-print classic The Binary Stars. ... eyepiece to make professional-quality measurements using a small Maksutov–Cassegrain telescope – one just 3.5 inches in aperture! You can get a 5% discount at Tejraj - click here to get my affilialte code. This 8" f/12 Cassegrain from GSO is a modern take on the classical Cassegrain design. . . 1560, Eyepiece Projection Camera Adapter . Found inside – Page 43This is not the case for computation 2 , this only works on the classic cassegrain . Computation 3 serves the same function for the Ritchey - Chrétien . Computation 5 serves for the Dall - Kirkham . Then finally computation 6 is for the ... Found inside – Page 426... 6 = 1 mm of the 60-inch Mt. Wilson telescope and Ritchey's 40-inch RC telescope for the US Naval Observatory Case Transverse decentering coma (arcsec) 6 = 1 mm 60-inch Mt. Wilson 80-foot focus classical Cassegrain 0.183 (m2 = –3.2; ... . 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. Electronics › . mechanical properties. Found inside – Page 42Very soon after the reflecting telescope was invented by Newton, Guillaume Cassegrain introduced a modification now ... Having used classical Cassegrains ranging from 6 to 30 inches in aperture, I have never been impressed with their ... 33% obstruction caused by secondary mirror, comparable to SC telescopes. THE GSO EIGHT INCH CLASSICAL CASSEGRAIN TELESCOPE 42 Astronomy TECHNOLOGY TODAY 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. 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. Large corrected and illuminated image field due to parabolic primary and hyperbolic secondary mirror with less field curvature than with SC telescopes. . 3000, 2 inch T-2 Camera Adapter . 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 . Cassegrain Telescopes. A refractor telescope uses convex (bending outwards) lenses to collect, focus and magnify light. Add Telescope Add Eyepiece Add Camera Add Binocular. . . Astro-Tech AT70ED - 70mm aperture, 420mm focal length, f/6 ED doublet refractor - $300; Recommended Advanced Telescopes. Significantly less expensive than other classical Cassegrain telescopes! In terms of optical quality, Cassegrain telescopes are superior to customary Schmidt-Cassegrain systems. . The two most popular types of telescopes are refractor and reflector telescopes. Manufacturers & Suppliers of Astronomical Telescopes in India, 6" F/12 M-CRF Cassegrain Telescope OTA (Optical Tube Assembly), The following items are FREE with the telescope listed above. No meniscus or lens that could fog, only two reflections of each 99%. Significantly quicker temperature adaption than a SC, due to open design. No shifting, because the primary mirror is fixated, High-quality 2" Crayford focuser with micro-gear reduction and compression rings for 2" and 1.25" accessories. Found inside – Page 18The latter are rarely used these days because they are only practical for smaller sized 'scopes less than 6 inches (15 cm). ... of the Cassegrain and Gregorian types, either in classical or Schmidt Cassegrain or Maksutov configurations, ... This rare telescope was generously donated by The University of Iowa through the Department of Physics and Astronomy. . Rs. Long focal length of 1836mm (f/12) "folded" into an optical tube just 20.5" long - so you won't need a giant mount! Rs. 1 year warranty The StellaMira diagonal feels nice and solid and has well engineered parts with the cap and the 1.25 inch adaptor fitting snugly and being easy to change. 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. Because the C-400 employs the Classical Cassegrainian configuration with a . Regularly $2500.00 now just $1799.00 USD plus s&h. Now is your chance to make the telescope you have always wanted. Rs.2100, GSO 2 inch Mirror diagonal . . Classical Cassegrain optical design excels for high-power lunar and planetary observation and imaging.For our US and Canadian customers - http://bit.ly/2tizH. 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. Rs. . . . Found inside – Page 6Cor- optical testing methods for verifitem would no longer be corrected recting 6 to 7 waves of spherical cation of the main null ... medium - accurthree times worse than a classical just not the way to go . acy testing schemes . oxide and beeswax that will be used. Up until the n a 6-inch reflector or refractor was Thanks to the highly sensitive sensors built into modern astro cameras, even deep-sky photography of nebulae, star clusters and galaxies is possible. Rs. Inside the observatory chamber. We are pleased to offer our 3.3" 1/8 wave PV convex secondary mirror. You need to purchase the mount separately, which adds to the cost. with making a cassegrain has always stopped the amateur telescope maker because they . However, such an instrument is. . Some telescope designs use mirrors to gather and focus the light (Newtonian reflectors) and others use lenses (), but catadioptric telescopes use a combination of mirrors and lenses to do the job.The SCT telescope has a primary and secondary mirror, but it also uses a very thin lens called a corrector plate to . 1830, GSO 1.25" 32mm Camera Projection Lens (CPL) eyepiece ... Rs. Submitted: 2 years ago . Objects Viewed: moon, Mars, globular cluster M13, Ring Nebula M-57 Key notes: Large aperture shows objects well. That means the CC6 is easily supported on a modest-size mount such as the Orion Sirius EQ-G. A complete 2004 how-to guide, packed with advice on the most popular telescope in the world. Found inside – Page 736.3 Image size and field of view 73 Table 6.1 Size of coma - free image in Newtonian or classical Cassegrain f ... That's how the 508 - cm ( 200 - inch ) f / 3.3 telescope on Palomar Mountain manages to produce sharp images on 4 x 5 ... diagonal(not supplied). I purchased this scope as my Grab & Go set up with high hope on a budget designed telescope. 2100, 6 mm Plossl Eyepiece 1.25" . Build your own 12.5" f/15 Classical paraboloid hyperboloid figuring waves mirror correction making pitch squares shadows lens lense secondary primary effective . Maksutov-Cassegrain Telescope for Adults Kids Astronomy Beginners, Sarblue Mak60 Catadioptric Compound Telescope 750x60mm, Compact Portable Travel Telescope, with Tabletop Tripod Phone Adapter 318. [ Subject To Availability ], Suggested Accessories with this Telescope, The Moon Map Poster B/W chart unfold to 22"x26", 110 Messier Object Locator A4 size front back colour print, Star Dial - Identifying Stars & Constellations, Desiccant Cap - Refillable desiccant cap to protect fine optics, Carry Bag for 6 inch CC OTA . The secondary mirror of the classical Cassegrain telescope is substituted by the sub-aperture corrector in this telescopic design that uses three air-spaced lens elements. Meade's ACF optics offer a flatter field and higher contrast images than typical Schmidt-Cassegrain telescopes, and with features like on-board GPS and Meade's Astronomer Inside computerized go-to mount, the Meade LX90 is easy to use.
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