At the time, lawrence braymer was already producing his famoustobe questar maksutovcassegrain, a design very similar to gregorys in order to avoid. So i rewrote atmos in visual basic and added much more analysis routines and useful telescope design tools. Optical design software for simulating systems of lenses, prisms, etc. The cdk corrected dallkirkham telescope is based on a new optical design developed by dave rowe. Telescope designer gave amateur astronomers a new look at the stars. Fully multicoated f12 rumak maksutov optics and interior baffles deliver high contrast views similar to a 5inch apochromatic refractor, at a fraction of the cost. Oslo is a powerful optical design program with the scope. Optical layout of a typical maksutovcassegrain telescope this section details the optical design and inherent aberrations of maksutovtype catadioptric telescopes. For users of the ray optics module, comsol multiphysics version 5.
Maksutovcassegrain telescope amateur telescope optics. Pulsar goto controllers telescope german and fork mounts. Houghtoncassegrain allspherical and aspherical types. A maksutovcassegrain, also referred to as a makcass or more simply, a mak telescope, is a member of the catadioptric telescope family and uses both mirrors and lenses in its folded optical design. Both setting circles are illuminated and viewed through an eyepiece built into the north end of the polar axis. Atmos now is a very powerful program with a userfriendly interface that allows the user to analyze, design and optimize centereduncentered optical systems. The primary objectives were to be anything but difficult to use while watching and observing the sky, and to maintain a strategic distance from missteps like catching with the wrong resolution and. The pictured telescope is a masterpiece of the telescope makers art that john built and brought to the texas star party in 1984. It ray traces the telescope checking for vignetting, optimizes diagonal size, calculates baffle size and position and more. Telescope types and designs there are three basic types of optical telescopes refractor, newtonian reflector and catadioptric. It boasts big 127mm 5diameter optics but in a telescope tube thats a fraction of the length just 14. Exe of harrie rutten and martin venrooij, but this program is compiled executable file and cannot be changed. Company seven meade instruments company history page.
The goal of the design is to make an affordable astrographic telescope with a large enough imaging plane to take advantage of the large format ccd cameras of today. The original maksutovcassegrain design of john gregory employed an. Revolutions in telescope design are driven by dreamers. My name is massimo riccardi i am an italian optical designer and optician.
Atmos is a powerful program for telescope analysis and design. With 127 mm aperture, the telescope gathers over 60% more light than a refractor with 100 mm aperture. The rumak maksutov, named after its designer designer harry rutton, is a more. So, if i can see them with the naked eye, bearing in mind i knew they were there so it might be suggestion, im sure they could have been perceived in antiquity. Ive pitted charity against a c5 on several occasions, and the.
Suggestions for aspiring hobbyist electronics forums. Getting a product like the cdk into the hands of serious imagers and amateur astronomers has been a shared vision. This design form is often referred to as a rumak or sigler maksutov. Therefore the curvature of the secondary mirror is always the same as the curvature of the corrector lens. There is a notion that its optics has special properties, making it sort of exception in that its intra and extra focal pattern are not supposed to be identical, even when it is near perfectly corrected. It supports the telescope s weight while also allowing you to rotate its. Orion apex 127mm maksutovcassegrain telescope orion. For folks used to observing m in a 6 or 8inch telescope, the great glob in a inch, especially from a dark site, was, to put it mildly, a revelation. Amateur telescope making atm is a hobby that combines the craftsmans hands, the artists eye, and the scavengers nose. Youll find a wide selection of truss and optical tube options as well as astrographs.
All of these telescopes are designed to collect light and bring it to a focus point so that it can be magnified by an eyepiece, however each design does it in a different manner. The maknewtonian design provides large aperture apochromatic performance with exceptional field correction in. When you click on each link below, youll go to a page that explains what the software does, shows a sample screen, and links to the downloadable file. It consists of a small concave mirror, a gas laser, a semitransparent flat mirror, a concave ellipsoidal mirror under test, and a register equipment. The rutten maksutov has a separately curved secondary which gives an additional degree of freedom for the optical design. Meet john gregory in 1957 john applied the concept of the maksutov meniscus camera to the cassegrain telescope, making possible the compact design and sharp, well corrected images of the questars, quantums and other maksutovs of todays commercial telescope industry. An interesting aspect of the commercial maksutov cassegrain is the question of its star test. Meades dsi camera control and basic image processing software. Extraordinary telescope made by the renowned john gregory. The newtonian telescope design planner uses javascript to perform the mathematical calculations. Keck telescope the keck telescope is a 10meterdiameter telescope with a ritcheychretien optical design. Thats the beauty of its maksutovcassegrain telescope optical design its so wonderfully portable. Design work began in september 1997, with the actual work on the optics beginning in december and being completed except for. The rumakmaksutov design features a separate secondary rather than a silvered spot on the rear of the corrector as in the more common gregory maksutov.
What you call gregorian maksutov is gregory maksutov, after john gregorys 1957 designes. Based on the dos version of the program, winspot is easier to use with more menu options, and takes advantage of standard windows printer support. In 1957 john gregory, a designer for perkinelmer, developed a new meniscus design known as the maksutovcassegrain, based on maksutovs idea. Modas stands for modern optical design and analysis software. Gregory 1927november 14, 2009 was an american optical engineer and a popularizer of amateur telescope making. Stellafane convention telescope competition winners. He is credited with the design of a version of the maksutov telescope called the gregorymaksutov telescope. Starry night 8 astronomy telescope control software for. Summarize oppgtical design of a newtonian telescope. The extra degree of freedom that this provides over the gregory maksutov results in a far better design and stunning performance across the whole field.
Astronomy software, such as the free stellarium program, can you help plan nights of observation. These use aluminized spot on the rear of maksutov corrector, which makes the secondary convex. View saturns rings, jupiters cloud bands, and the moon in brilliant detail. It ray traces a newtonian telescope design checking for vignetting, optimizes diagonal size, calculates baffle sizes and positions, and produces. Evolution of the maksutovcassegrain telescope by john f. Pulsar goto controllers the natural evolution of pulsar1 is the pulsar2 goto controller. Riccardi has considerable experience with telescope designing and glassworking. Gregory 19272009, optical worker and creator of the gregorymaksutov telescope design jack gregory american football coach born c. This frame shows venus and the thin crescent moon framing comet 2pencke. Gregorymaksutov telescope 275 mm cn classifieds cloudy. The moving mirror design gives the telescope a large focusing range enough to accommodate virtually any combination of sensors, from cameras to ccd detectors to spectrographs. Here are possible a lot of configurations, like gregory maksutov cassegrain the socondary is an aluminized spot on the back side of the meniskus corrector, rumak maksutov cassegrain like gregory, but with separate secondary mirror, simak and sigler maksutov cassegrain. The method is used to design the freeform surfaces of a telescope whose performance is verified in offtheshelf optical design software zemax.
This software provides an efficient way to transfer, browse, modify and distribute digital media. The etx90 maksutovcassegrain offers terrific optical quality that is the envy of the telescope industry, the easy to use meade autostar computer handbox with over 30,000 object library, and a solid mount and tripod. With the focus motor installed, you can bring celestial objects into sharp, precise focus using your telescope s hand controller or a computer instead of using the focuser knob. The maksutov also called a mak is a catadioptric telescope design that combines a spherical mirror with a weakly negative meniscus lens in a design that takes advantage of all the surfaces being nearly spherically symmetrical.
In 1957 john applied the concept of the maksutov meniscus camera to the cassegrain telescope, making possible the compact design and sharp, well corrected images of the questars, quantums and other maksutovs of todays commercial telescope industry now commonly refered to as the maksutov telescope, it was john that actually designed the first f23 system of this type. Design work began in september 1997, with the actual work on the optics beginning in december and being completed except for final testing in march 1998. What you call gregorian maksutov is gregory maksutov, after john gregory s 1957 designes. Its optical design is said to be very similar to the limited series 10inch astrophysics f14. Gregorymaksutov telescope the gregorymaksutov telescope is a simple catadioptric telescope comprising a spherical corrector lens and a spherical.
Maksutovcassegrain telescopes serve as an alternative to schmidtcassegrains and newtonians, and offer astronomers a large visual aperture, high contrast, and long focal length in a compact package. Modas stands for modern optical design and analysis software it is a telescope design software of the most popular telescope systems used by the amateur astronomers and telescope makers, including spot diagrams, ray fans, wave aberrations, diffraction analysis, optical layout, optimization, tolerancing, mirror testing and many other atm tools. Jodas java optical design and analysis software written by ivan krastev. Also, this provides a stable, nonmoving mount for a camera or other device. This is the case with the ylena 150, a 6 f14 gregory maksutov design of unparalleled surface accuracy and smoothness. The 127mm aperture gathers enough light to see our solar system and beyond. Although known as allspherical design, maksutovcassegrain can also be made with aspheric surfaces. This allows to practice lucky imaging approach using software like registax and. Maksutovcassegrain axial aberrations telescope optics.
Celestrons proprietary skyalign procedure has you ready to. It allows you to easily and quickly change any of the design parameters of the telescope and to see the results. The same year that john gregory brought his 5inch mak to the. Amateur telescope maker optical design and analysis software.
Orion 180mm maksutov cassegrain ota lowest prices opt. And you can still reach focus with devices like flip mirrors and off axis guiders. Aug 02, 2009 i am getting ready to buy my first serious telescope and have been researching as much as possible to find something that fits me best. A very fine telescope can be built from almost anything. Skywatcher 127 mm 5 f1500 maksutov cassegrain telescope tube the skymax 127 is a compact and poweful telescope for planetary and deepsky observing, but it can also be used very well for daytime viewing and photography. Simple laser interferometers for concave ellipsoidal mirror.
Laser beam is reflected by very small concave or convex paraboloidal mirror and then it is directed to the semitransparent flat mirror, and to the mirror under test. The names come from 17th century french sculptor sieur cassegrain, 20th century estonian and russian astronomers bernhard schmidt and dmitry maksutov, and american optical engineer john gregory. The exciting new starlux maknewtonian from skywatcher is just what astrophotographers and serious visual observers have been looking for. Telescope designer gave amateur astronomers a new look at. I am selling this family heirloom just for emergency reasons. Simulate light through the system and compute images and intensities at various locations in the design. Your photo indicates one can see the secondary spot on the corrector, so if im interpreting the situation correctly it is a rutten designed gregory maksutov, likely. This telescope calculator takes the objective diameter, f ratio, focal length, eyepiece apparent field, and eyepiece focal length as required to calculate the estimated objective performance, telescope magnification, magnification per inch, true field, and exit pupil size. A tripod is a threelegged support device for the telescope. Maksutovcassegrain telescopes are very popular, especially in smaller apertures, due to their super portability and beautiful highcontrast views. Planewave instruments was founded in 2006 by richard hedrick and joseph haberman, two former telescope engineers at celestron. Many telescopes, even beginner models, ship with software to help aim the telescope. Bonus starry night special edition astronomy astronomy software software download with a 36,000object database, printable sky maps and enhanced images including 3d renderings of stars, exoplanets, and galaxies. Optical layout of a typical maksutovcassegrain telescope.
Skywatcher 127 mm 5 f1500 maksutovcassegrain telescope tube the skymax 127 is a compact and poweful telescope for planetary and deepsky observing, but it can also be used very well for daytime viewing and photography. It is limited only by the makers creativity and resourcefulness. Dozens of free or inexpensive computer programs can aid your observing or simply allow you to explore the sky, with options available for mac, pc, and unix. Discover the ritchey chretien telescopes you need at telescopes. Mar 19, 2017 gregory maksutov 275 mm telescope made by jhon gregory. Gregorian maksutov would have been one using concave secondary mirror. Whether used as a highly portable astronomical telescope or the ultimate terrestrial spotting scope this tube assembly will in my own experience equal or exceed any similar aperture on the market regardless of type, and blow. As compared with a fullaperture maksutov corrector, there is a great saving in glass, abrasive, and labor by going to the subaperture corrector of these designs. Starry night pro plus 8 is our fully featured flagship program, tailored for the astronomer who wants the very best inclass astronomy software and telescope control experience. Introduce you to newtonian telescope characteristics. From 2000 on, the yearly pink separator in the table has a link to the telescope competition section of our convention web pages, where you can see photos and sometimes videos of most of the scopes, winners or not just click on the year characters.
Fields initially containing calcd andor are bordered in red are always calculated and cannot be manually entered. This telescope design has a reputation for sharp, highcontrast views, ideal for planetary observation. Here are possible a lot of configurations, like gregory maksutovcassegrain the. Maksutov cassegrain telescopes top brands lowest prices. From november 2009 gemini telescope design is offering this new version that retains all the key features of its predecessor but adds a host of new valuable functions making it especially suitable for remote control. Newt for the web newtweb for short is a newtonian telescope computer aided design program.
Oslo optics software for layout and optimization is a powerful optical design program with the scope needed to meet todays optical design requirements. The nexstar 127slt is the secondlargest in the slt family. The focus motor provides electronic focusing for celestron schmidtcassegrain sct, edgehd, and rasa telescope optical tubes. Do maksutovcassegrain telescopes require collimation. For a more basic overview of these designs please see the maksutovcassegrain page and the maksutovnewtonian page. Ackermann has drawn my attention to the fact that this design. Later the schmidt corrector plate was applied to the cassegrain design and the schmidtcassegrain telescope was born. He gave complete design specifications for 6inch f15 and f23 telescopes.
This software is provided as is, and without any warranty or support. John gregory published an article in the march, 1957 issue of sky and telescope describing his new design for a maksutov cassegrain telescope. Maksutov s 1944 design was the firstpublished meniscus telescope design, and was published in the widelyread journal of the optical society of america. Atmos optical design and analysis software is the creation of massimo riccardi, an italian advanced amateur telescope maker and designer. Its optical design is said to be very similar to the limited series 10inch. Aug 10, 2006 because i wanted to design my own telescope. These photos only hint at the forethought and clever design that went into this prime specimen. In the 1960s, celestron s founder, tom johnson, created groundbreaking new telescopes never before seen on the consumer market. It is a telescope design software of the most popular telescope systems used by the amateur astronomers and telescope makers, including spot diagrams, ray fans, wave aberrations, diffraction analysis, optical layout, optimization, tolerancing, mirror testing and many other atm tools.
Full text of sky and telescope 197412pdf internet archive. In addition to classical lens design features, it combines advanced ray tracing, analysis, and optimization methods with a highspeed macro language to solve a wide variety of new problems. The telescope uses a 3element design with a separate secondary mirror. Jun 19, 2002 a simple laser interferometer is proposed. The bright points correspond to the horns of the crescent as seen with an f11 90mm gregory maksutov scope at 66. The meade usb to serial cable provides the capability of using the usb port on a personal computer to connect to a.
It is principally intended for astronomy and astrophotography use. These have been satisfactorily tested with netscape 4. In the present age of personal computers and optical design software. Optical design software for optical systems comprised of light sources, lenses, apertures, prisms, imagers, photometers, etc. In the 1960s, celestrons founder, tom johnson, created groundbreaking new telescopes never before seen on the consumer market. Gregory later published his design for two f15 and f23 telescopes in a 1957 issue of sky and telescope. Bouwers of amsterdam, holland, in february of 1941 and dmitry maksutov of moscow, russia, in october of 1941 independently conceived the idea of replacing schmidts complexly shaped corrector. Upon installation, please use serial number 783a36800007296416. John gregory published an article in the march, 1957 issue of sky and telescope describing his new design for a maksutovcassegrain telescope. Superb moderate and highpower optical performance in a remarkably compact telescope design. Accurate digitized astronomical data, planetarium software, smartphones, coma correctors, well corrected wide angle eyepieces, meniscus mirrors, 3d printing, digital cameras and image processing software represent the vanguard of the latest in telescope design. These big, gawky, but loveable telescopes will never win any design awards, but they did what they needed to do, turn a whole lotta boys n girls on to the beauties of the great out there.
Index 318 magnitude gain, 5 maksutovdmitri, 82 maksutovcassegrain, 82 gregorymaksutov 82, meade, celestron and intesmicro, 83 rutten rumak, 83 talklevzovcassegrains, 84 vixen maksutov cassegrains, 83 vixen vc 200l, 84 maksutovnewtonian, 64, 66. One of the telescopes i am considering is one that uses a maksutov cassegrain design, but i cant find any information on whether it requires collimation like newtonian reflectors. I had built a newtonian from someone elses design and i wanted to learn the details of design and come up with one more to my specific tastes, at the time. Two versions of the planner have been developed one for netscape and one for internet explorer. Commercial use of the design was explicitly reserved for perkinelmer. The gregory makcass suffers from both coma and astigmatism, limiting. While either of the two main types above can have aspherized surfaces, in the amateur telescopes arena it is usually the gregorystyle mct, and. Software for optical design and analysis kens telescope online calculator. A comprehensive manual for amateur astronomers harrie g.
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