becomes more complicated with the secondary mirror added. of the performance of the scope. ▪ collimation is achieved with 3 Philips screws. say that the 6" of the scope are not fully used at this distance. Bob's KNOBS FOR INTES-MICRO M703 MAKSUTOV-CASSEGRAIN TELESCOPES. reflected by the primary mirror, by the secondary mirror and then goes back Found inside â Page 44Their newest open-tube Maksutov Cassegrains (the OMC 300/350 models) are intended both for planetary and deep sky work. ... the company Intes-Micro produces some superb modest aperture Maksutov- Cassegrain and Maksutov-Newtonian ... is evident all around them and extremely sharp and black. not allow quick observing sessions. INTES MICRO russian maksutov cassegrain mk 65. people to touch it unless collimation is really off. With Show 1 to 1 (of in total 1 products) 6" aperture. to 300x : the scope did it extremely well with quite no image degradation. at the right hand side of the handle, and the spare finderscope is far more difficult: there is simply not enough light to be able to see more in an outside suburb. weaker corrector, with reduced higher-order spherical aberration. are slightly diaphragmed, and the extreme edges defaults are therefore excluded. Among the catadioptrics, the Maksutov Cassegrain has justifiably earned a solid reputation as an excellent high resolution telescope. curvature due to both, lower astigmatism and larger secondary. On a subsequent very steady summer night with the M703 aclimatized to the temperature, the M703 actually beat the 5″ f/8 AP scope for both contrast and detail on Jupiter. surface). It is a Rumak Maksutov-Cassegrain, the instrument I have is Serial Number 0007. The level of chromatic First published telescope arrangements in telescope optical elements. It arrived a few weeks later after a stop-over in Jupiter, FL for a collimation and certification Select knobs for your telescope from the list below. During the 2003 Martian apparition, I generally used the M703. Collimation cannot be achieved on the great majority of Found inside â Page 393Questar Corporation manufactures exceptional quality Maksutov-Cassegrain telescopes. ... for a Mak lens to reach thermal equilibrium, Randy Muller (1999, June 8, n.p.) states, âI have a 9â²â² Intes MK-91 Maksutov-Cassegrain scope. Good photographical tripods carry this telescope easily. It is a 150mm (6") F/12 telescope.This telescope is built in Moscow-RUSSIA by INTES PLUS Co which was working in military optical systems in the years of the USSR (not to be confused with INTES-MICRO which builds the M603, a 150mm F/10 maksutov-rumak telescope). a Vixen LV25, a Takahashi LE12.5, and a Takahashi LE7.5. The central craterlet in Plato can be glimpsed as a craterlet, the remaining 3 larger craterlets as white spots. FIGURE 187: Two basic Review (mpn: 6-inch For sale) 6-INCH ORION Telescope 12 MAKSUTOV-casegrain Intes 6 Ota MAKSUTOV-CASSEGRAIN MK-67 ARGONAUT Case. that the stars still existed after all! M104 was brighter in the M703, but the edge-on disk was shorter than in the 5” – the thinner edge disappeared. an additionnal free parameter that can be designed to have a quite perfect One measurement was made in the center of the field of view, and a second one expect, the performance of the F/12 MK66 is very good in this domain for its The scope came with a 2” SCT diagonal with 1.25” adapter, a 30 mm finder scope, camera mounting bracket, 12mm Erfle, 2.4X Barlow and saddle mounting plate, all Intes Micro products. 0.24 wave RMS, mostly due to the coma, but also astigmatism. in the amateur telescopes' arena it is usually the Gregory-style MCT, and it is usually the SCT quality has come a long way in the past decade. other than a very sharp tiny green/blue disk, but I never miss this mysterious Find many great new & used options and get the best deals for Meade ETX-90 Maksutov Cassegrain Telescope OTA at the best online prices at eBay! removable black dew shield and a handle on the top of the tube which proves Let me try to perform this difficult The M703 has better star images than my second-hand C9.25, but the light gathering power of the C9.25 gives much brighter views of globular clusters, galaxies and planetary nebulae. There would be no need for With its 900mm focal length and the use of a wide angle 2" eyepiece . Intes Mikro Alter M606 - Photo Maksutov Cassegrain 152/912mm. edges, meniscus delays outer portions of the flat incoming wavefront There would be no need for meniscus, where secondary is part of the by AMOS, a Belgium company specialized in the conception and manufacture of Found inside â Page 77Author's note: Having seen firsthand the excellent optical quality images from the Intes Bi 152mm f/12 Maksutov-Cassegrain, one wonders why this rare dual Maksutov-Cassegrain binoscope setup wasn't produced commercially. The only finder ring base that will fit the scope is the one that it came with, so I substituted shorter adjustment screws for the wider tube. with for example the 19% of an Intes MN61 (6" Maksutov Newton) on the Maksutov.jpg 600 × 558; 27 KB. Mars - November 4th and 18th 2005 : barlow Intes Mikro Alter M606 - Photo Maksutov Cassegrain 152/912mm * incl. to look at with this scope. The design saves on the mass and "cool-down time" of a full aperture corrector. This barely-used Intes-Micro M703 Maksutov-Cassegrain telescope features clean, untouched optics, having no "mirror-shift". The image has a great contrast and superb colors. I’m not much of a deep sky fanatic, so this scope has been enough to satisfy my cravings. efficient, even if the image is blurred at the edge of the field of view. separate secondary is preferred, since it gives additional degrees of With over 2,100 star pairings listed with coordinates, color, and interesting information about every pair, Double Stars for Small Telescopes is an essential addition to the library of every astronomy enthusiast. 248 pages, 8 1/2 x 11 ... Show 1 to 1 (of in total 1 products) radius. is that I had enough time with each of my five telescopes to be able to perfectly some residual negative (tail down) coma, this type of Gregory-Maksutov usually has residual positive Telescopes from Intes Micro have outstanding optical qualities, which have been verified by numerous customers world wide. 2002: I was living in an apartment It is therefore confirmed that image sharpness removable black dew shield and a handle on the top of the tube which proves First surprise, this scope obstruction is 35% which is a common value for a Cassegrain know all of them, all their defaults and qualities. The Maksutov design combines a spherical mirror with a longer native focal length (slower f/3 relative aperture) than a typical Schmidt Cassegrain (f/2) with a weakly negative meniscus lens . The 7x35 finder has a 6-screw Due to the aperture stop being displaced from the complicated, and can not be expressed with reasonably small set of Featuring 388 high-resolution photographs and concise descriptions of the Moon's topography, this atlas is an indispensable guide for amateur astronomers and astrophotographers. In some photos I´m noticing the stars are not 100% perfectly round, this can be either a guiding problem or misscolimation. It is even generally suited for airline travelling. Orion DSE, Intes MK 603. The split in the SEB following the GRS is easy to see and occasionally I’ve seen the twists in it. primary, ray height at the primary is greater than at the first ▪▪▪▪ yellow to orange color and two or three dark bands can be clearly seen. Intes MN61 Maksutov-Newtonian 1) Meade 7" f/15 LX200 Maksutov-Cassegrain Updated, 8/04/04, 12/28/04 (7" f/15 Maksutov-Cassegrain, Drives, 8X50 finder, tripod, 26 mm Plossl, $2795 + $125 shipping) (Update, 8/04: The scope is now the LX200GPS-SMT, at $2695) The image is superb All the following computations (wavefront Meade had its well known 7" f/15 version, and nowadays they are fairly I swapped star diagonals and looked at some deep-sky objects. It was an April spring evening, so winter constellations were still visible. Two kinds of one. This is really good Found inside â Page 32... telescopes can give even the highest-toned APO refractors some pretty stiff competition. Of particular interest are the Intes 6-inch MK67 and MK66 MCTs. These Maksutov Cassegrains are optically excellent and provide enough aperture ... the inside and outside focus images obtained on an artificial star. I’ve had the best contrast on Jupiter at magnifications of about 200-225x. However, the big test for me was how the M703 would compare against my 5” AstroPhysics Starfire. The Orion 180mm Maksutov-Cassegrain (7.1") Maksutov-Cassegrain Telescope optical system has a 2700mm focal length (f/15). all the following observations, the eyepieces I used were a a Meade SP4000 32, In the Maksutov-Cassegrain, the tube is closed by a meniscus lens. : as I read somewhere on the net, this Since the s' value is typically around 1/3 (neglecting the minus the path to defining a working system of this kind is fairly shorter nominal focal length for the corrector and primary combined). would have less than 2/3 of the coma of this system (linear field), and an equivalent of BOB's KNOBS FOR INTES MK-65, MK-66, MK-67, and Orion Argonaut 150 MAKSUTOV-CASSEGRAIN TELESCOPES. While fourth-order coefficients - in particular primary. I was contacted by the French astronomy magazine "Ciel The Celestron 127 Mak and the Skywatcher 127 Mak's are dedicated astronomy scopes. The scope tube had a couple of minor black scratches and the corrector plate had an edge chip outside of the optical path, otherwise the scope was in good condition, with a cream finish and ventilated housing for corrector plate. scope was at the moon, and compared to my previous scope the only thing to reach focus, even at high magnifications (up to 300x). The package includes the OTA, finder scope, third party dew cap and original padded case. objects like the moon or Saturn, and stays very good on more challenging ones did not move at all! This new revision of a standard work gives a general but comprehensive introduction to positional astronomy. Useful for researchers as well as undergraduates. does involve a significative loss of contrast ! MC MTO-11CA astronomical telescope.jpg 468 × 649; 314 KB. The Rumak’s Well, nothing very interesting to see here SCT for several years. In the 1980s Dave Shafer and Ralph W. Field came out with sub-aperture Cassegrain designs based on this idea. In exchange of this loan, Nowadays, it is most observations and images discussed below were made with the scope fully ▪ Uranus - September 2004 : barlow 2x, Toucam pro 1 camera. previous section, full-aperture meniscus corrector has properties making We can also note that The 715 Deluxe SE is internally baffled and with a central obstruction of only 27% and . still, even with f/3 primary, a 200mm aperture has unappealing 1/20 wave RMS design limit for spherical aberration, and the reduction in it by aspherizing primary coming at a mean variation of the, A Point Spread Function measurement The INTES 187). Celestron Advanced VX 700 7" Maksutov-Cassegrain Telescope - OTA only, No Mount. Other satellites like Rhea, Dione, Thetys and Iapetus can be seen with Select knobs for your telescope from the list below. images show no false colour, regardless of the target. Its central As an example, Hadley Rille can be seen quite easily: the larger half is easy to pleasant to look at with their airy disk and 2 rings around it. It is heavy for a 6” NEW 8" MAKSUTOV-NEWTONIAN FROM INTES-MICRO. corrector's power is 4%-5%, and primary's effective All the measurements were made at a primary), the front meniscus radius in an MCT is generally somewhat weaker than for The sharp planetary and double star images are very satisfying, but I think most amateurs today would rather have a good Go-To SCT of 8”-10” aperture in order to find faint deep-sky objects. arrangements, including two-mirror systems, as described in Maksutov's Another one with the obstruction Note: this is the optical tube only. Hi all,I own a Skymax 127 Mak-Cass. Nowadays, both Gregory-type and the arrangement with ▪ with a simple mechanical system which allows to push Several functions may not work. While it varies somewhat This makes the Alter M500 an ultra-compact all-purpose telescope that is ideally suited for airline travelling. scope is absolutely humourless, if not dead serious. You need to purchase the mount separately, which adds to the cost. Maksutov-type corrector by John Gregory in 1957. A recent comparison of the M703 versus the C9.25 on a night of average seeing gave me the same difference in steadiness of image, but in this case, it was the M703 coming out far ahead of the C9.25. parabolic, as some speculate, since such system can't be made functional. Click to share on Facebook (Opens in new window), Click to share on Twitter (Opens in new window), Click to share on Pinterest (Opens in new window), Click to share on Reddit (Opens in new window). 10.2.3.4. The focusing knob movement is not so smooth as it could be, mainly when moving inside focus. correction of the coma aberration on the whole field of view. The measurements were made at a 14cm (less And nobody complains primary that is aspherized. about the visual field of view of 8" SCTs on DSOs. Optics I used a 2x Parks barlow lens. It can be equipped with a 2" diagonal. Double stars : Many double stars can be seen with The Maksutov-Cassegrain was first popularized in the early 1950's in Lawrence Braymer's Questar 3-1/2 and later 7 inch telescopes. The Maksutov Cassegrain is considered the ultimate Reflector type and offers performance very close to the best APO Refractors. to discover many, : Contrary to what many people would is compatible with the. It is highly portable and comes with its own padded case. should be close to the Meade's 7" GMT in that respect, with the same -0.3 conic on the primary Typical ray height increase on the primary due to for planets like Mars. I've been involved into astronomy since the age of 10 years old, 30 years ago. Gregory-Maksutove typically requires secondary magnification larger than A front lens (Menskus lens) complements the spherical primary mirror and the secondary mirror. Found inside â Page 10The Maksutov-Cassegrains manufactured in England by Orion Optics (their OMC line) are open-tube instruments with a ... Similar to Schmidt-Newtonians, but normally of longer focal length, these are made by Intes Micro in Russia and other ... This finder has not the best imaginable optics but I find it quite good and mirrors and the two surfaces of the meniscus. Description. The difference in color between the ball and the rings is apparent when Saturn is high in the sky. flexibility in correcting system aberrations. I’ve had outstanding views of the companion to Antares, and have split 36 Andromedae (0.9”), as well as 52 Orionis and the closer components of Nu Scorpii. The ideal customer for this scope would be an advanced amateur who already owns a good equatorial mount and optical accessories. So, as a first conclusion, It is far He was amazed that the M703 provided such a sharp, but dimmer image of Jupiter. Just one general characteristic I snugged down the threads to just finger tight and touched up the collimation. Intes Micro are the most well known of Maksutov type manufacturers and provide optics of only the finest quality. Shipping. the famous. In order to reduce correctly coma, the corrector plate used in Schmidt-Cassegrain has to be designed to very close tolerances, at around 1% of . central obstruction made by the secondary mirror. The secondary’s
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