Reflector telescopes utilize mirrors to bounce light to your eye. All telescopes are manufactured of aluminum and stainless steel for maximum corrosion resistance. Accordingly, the dall kirkham telescope would be the ultimate telescope, the photo machine for astrophotography with the best picture quality, the highest available field and the best star images. We discuss the properties of the two mirror telescope family, bringing out their. Exact focusing across the odk range is achieved with the acu3s 3crayford focuser featuring a 10. If you are interested in telescope optics, this book is very informative. Make secondary mirror a sphere adjust figure of primary to compensate remove spherical aberration bad offaxis performance ritcheychretien telescope design used for all large telescopes reduce offaxis aberrations by. Mewlon210 takahashi mewlon 210 2102415 dall kirkham. The cdk corrected dall kirkham optical design is an innovative solution for unsurpassed scientific investigation, visual observing and astroimaging at an affordable price. A superb example of this telescope with legendary optics from russia. In the case of a dallkirkham, for example, the separate mirrors are easily tested but.
Jodas stands for java optical design and analysis software. The development of telescope optics is a fascinating story. The cdk24 covers a 70 mm field of view without any field curvature, offaxis coma, or. Planewave 17 cdk optical tube assembly cloud break optics.
Dallkirkham telescope project gutenberg selfpublishing. The astigmatism and the field curvature can be corrected by a 2 element or 3 element field corrector depending upon how large the field is. The takahashi collimating scope is a 6 x 18mm telescope used to collimate takahashi mewlon dall kirkham and baker ritcheychretien reflectors, plus astrotech and gso ritcheychretien astrographs, and takahashi refractors mm in focal length and longer. These designs include schmidt cassegrains, maksutov cassegrains, newtonian and dobsonians along with a few specialized designs like celestrons rasa and meade acf advanced coma free designs. This paper compares specific designs based on the dall kirkham format of prolate ellipsoid primary and spherical secondary mirrors, in which excellent correction.
Theis 10 imaging dall kirkham is a fantastic telescope for deep space astrophotgraphy. Retailer of telescopes, binoculars and astronomical accessories. Also, aberrations in popular reflecting, refracting and catadioptric telescope objectives, telescope eyepiece and human eye. The primary mirror is ellipsoidal while the secondary mirror is. Quality made in the usa by a veteranowned business. A superb example of this telescope with legendary optics from russia william optics flt2 f5.
Jodas stands for java optical design and analysis software and it is based on modas. Advanced ritched chretien cassegrain dall kirkham flat optics coating. An interesting twomirror variant is one with the secondary left spherical. Page highlights field curvature coma and astigmatism aberration coma and secondary magnification field size in terms. It is an affordable, high performance solution for astrophotography and visual use, with a large, flat focal surface that is perfect for modern, high resolution, ccd cameras. Viewing the spot diagram will show you just how good the odk16 presents its outstanding specification, as will all the odk models. Collimating scope for ritcheychretiens, dallkirkhams, and. New designs of corrected dallkirkhamtype telescopes. German manufacturer of optics, newtonian astrographs and ritchey chretien telescopes. Dallkirkham vs classical cassegrain reflectors cloudy nights. It has excellent performance with large format ccd cameras, far exceeding the offaxis performance of most commercial telescope designs, including the uncorrected ritchey. Ritcheychretien or dall kirkham alluna optics telescopes. Apo refractors newton reflectors dallkirkham schmidtcassegrain aplanatic.
Whether you are in need of a cdk corrected dall kirkham, irdk infrared dall kirkham, or rc ritcheychretien, planewave has a telescope that can meet your project goals. Home books introduction to lens design mirror systems. The telescope bag a complete and heavy duty, quick on and off, zippered cover air turbulence lower cover keeps warm body air away from light path 8 dall kirkham. It is known as dall kirkham and, although with stronger coma than its classical counterparts, its mirrors are easier to make, and its miscollimation sensitivity is considerably lower than in either classical or aplanatic cassegrain, which makes it a viable practical alternative.
Call me and let me set you up with optics that suit your needs. Orion optics odk10 dall kirkham reflecting telescope. The cdk17 has a dual carbonfiber truss design, with 3 cooling fans ejecting air from the back of the telescope, and 4 fans blowing across the boundary layer of the mirrors surface. Why are there so many different kinds of telescopes. As with all the odk models, the odk10 is fitted as standard with an acu3s, 3 focuser to enable a strong focusing platform for a wide range of cameras. Ritcheychretiens, dallkirkhams, and other designs page. The outstanding performance of the idk series is made possible through the convergence of modern design, careful selection of materials quartz optics, stateoftheart manufacturing, and precise assembly. Youll also find advanced astrographs here like ritchiechretien and dall kirkham designs.
Telescopes, astrographs, ota i sell only what i use and endorse, call me and let me set you up with optics that suit your needs. With this java applets collection you can design and analyze one mirror newtonian and classical two mirror telescopes cassegrain, gregorian, dall kirkham, pressmanncamichel, ritcheychretien, one mirror catadioptric systems houghton, schmidt and maksutov cameras, two mirror catadioptric systems. Telescopes of the giovale open deck observatory lowell. To assist cool down of the telescope, each model is fitted with three fans, all positioned behind the primary mirror. In the case of a dall kirkham, for example, the separate mirrors are easily tested but. If youre looking for other sporting optics or weapons scopes, please visit our partner site anacortes outdoor. Roboscopes we have 12 telescopes to choose from, why not. We discuss the properties of the twomirror telescope family, bringing out their.
Orion optics uk dallkirkham telescope to be produced there by orion optics uk was a 150mm aperture schmidtnewtonian. The unique experience and creativity of massimo riccardi, chief optical designer at officina stellare, gives birth to a new 305mm diameter astrograph of superior performance and image quality. Takahashi mewlon 300crs corrected dallkirkham telescope. This may look like a book for amateurs but it is a tough read, a technical read and i say this from the perspective a someone who has had two years of calculus. The figures presented below have been made by computer and are very typical of what can be seen in a schmidtcassegrain, a classical or dall kirkham cassegrain, or a newtonian dominant coma. Hubble optics large aperture lightweight optics and.
Dallkirkham mewlon series reflectors are long focal length telescopes with high fd focal ratio. The preliminary field corrector design for the 24inch f7 telescope with a 1. Takahashi mewlon 250 250 mm dallkirkham cassegrain. Dallkirkham telescope encyclopedia the free dictionary. Viewing the spot diagrams and other graphic information below will show you just how good the odk16 presents its outstanding specification. The hubble corrected dall kirkham cdk optical configuration is a revolutionary optical design. Often you read about dall kirkham telescopes not always accurate and correct statements. The modified dall kirkham telescope utilizes an elliptical primary and spherical secondary mirror as in the conventional dall kirkham configuration, but also. Hubble optics large aperture lightweight optics and telescopes.
Jupiter taken with dall kirkham toscano 11 at f7800mm 0. The imaging dall kirkham idk series is a premium line of f6. These dall kirkham telescopes offer an optical quality unmatched by most modern scopes. The modified dall kirkham telescope utilizes an elliptical primary and spherical secondary mirror as in the conventional dall kirkham configuration, but also includes a lens group usually two or three lens elements ahead of the focal point to improve offaxis image quality. The ridk 305 riccardi dall kirkham represents the new reference point for all modified dall kirkham instruments available on the market. At their heart is the dallkirkham cassegrain telescope. The introductory model for the odk range is our 250mm model, the odk10.
Mirror systems chapter 16 introduction to lens design. Military apofpodpo addresses enjoy our free returns. Show dallkirkham telescopes, takahashi dallkirkham telescopes, and takahashi mewlon dallkirkham telescopes. An interesting two mirror variant is one with the secondary left spherical. The dallkirkham cassegrain telescopes design was created by horace dall in 1928 and took on the name in an article published in scientific american in 1930 following discussion between amateur astronomer allan kirkham and albert g. Corrected, optimized, modified, opt has all the dk designs you need. Takahashis crs series of mewlon telescopes leads the industry in advanced design and optical quality. The company is now a major manufacturer of optics which are used both in its own telescope series as well as in other brands of telescopes for example taurus optics dobsonian. Modified dallkirkham telescope from wikipedia, the free encyclopedia the modified dallkirkham telescope utilizes an elliptical primary and spherical secondary mirror as in the conventional dallkirkham configuration, but also includes a lens group usually two or three lens elements ahead of the focal point to improve offaxis image quality. Orion optics uk odk corrected dall kirkham astronomical telescopes are hand built f6. This book will both arouse your curiosity and answer your questions. Design procedure for ritcheychretien corrector osa. Elementary optics 29 a6526 lecture 1 other telescope designs dall kirkham. The cdk17 covers a 70 mm field of view without any field curvature, offaxis coma, or astigmatism.
We want to ensure that making a return is as easy and hasslefree as possible. Read more here the telescope hubble ul24 performed quite well again in argentina for the mu69 campaign there. Primalucelab designs, builds and sells telescopes and accessories for. Cassegrain telescopes an overview sciencedirect topics. The primary mirror conic constant is slightly different from that for a conventional dall kirkham and must be optimized. The instrument weight is 240 lbs 109 kg and comes standard with a back plate retaining ring ready to accept the focuser of your choice. Ritcheychretiens, dallkirkhams, and other designs page 2. As wil all the odk models we dont skimp by using just 2 lens elements in the corrector system, we could, but we know from extensive computer designs that there is a real need for 3 elements to give a wider, flatter field. Get the best prices on the ag optical idk line of telescopes from opt. The configuration of mirrors in a cassegrain telescope is shown in fig.
The galilean telescope uses a convergent objective lens to form an inverted image. Conditions were fairly poor with quite high winds which are typical of the area. Accordingly, the dall kirkham telescope would be the ultimate telescope, the photo machine for astrophotography with the best picture quality, the. The goal, a 300cm focal length, f10 diffractionlimited 1. Telescope comes with either carbon fiber or aluminum tube. For the linear field size, the corresponding paraboloids focal ratio f l also increases linearly, with 1. The dall kirkham design began with the primary mirror already fixed, and the. If for any reason you decide that your purchase just isnt for you, simply return the item within 30 days of.
New data from the hubble space telescope reveals the popular sombrero galaxy may have had a more violent past than previously thought. Cdk17 astrograph, 17 inch with fused silica optics modified to dall kirkham, with fully corrected image field 8 dovetail bar, focal length 2,940 mm f6. Telescope manifacturer in southern italy makes for you. Good images need good optics, all fitted in reliable, stable and precise engineering.
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