The 90mm (3.5”) Focal Length. Deep purple glossy tube with aluminum control box and knobs The Questar is made a little (lot) better. sturdy as any 3.5 duplex Questar owner can tell you. 3063 fluid pan head. OTA against an OTA listing at $10,550? The coatings appear in excellent shape. I have compared my own Questar Seven to a 14" Schmidt-Cassegrain on deep space objects such as the Sombrero galaxy, the Saturn Nebula, and Omega Centauri. Free shipping. 1280mm. I hope to one day more fully appreciate the Questar's optics. and without the 2X Barlow for 317 and 634X. would have to say no. There really hasn't been much to Olympus TG-2 afocal coupling to Questar Telescope… Mechanically, everything functions and works as wonderfully as I would expect. or clearances are too large, then the observer notices focus shift as he changes direction. both the 3.5 and the 7 for resolution in daylight with this chart. The low profile mounting adapter block on the underside of the Classic Titanium has both 1/4"-20 and 3/8"-16 mounting holes to allow to be installed on the Questar Equatorial Fork Mount (our part #20004) and Questar Large Classic Titanium Pier (our part #29338) for astronomical use. Look in and you're looking into a 7.6x finder with a wide 7° field. I haven't researched the numbers on those, but at f/13.5 it would be a little faster. That's twice the accuracy needed to meet Lord Rayleigh's Criterion, which specifies the level of optical excellence required to yield visual performance that is indistinguishable from perfect optics. As I was Many times I viewed Polaris so as to reduce the The optical tube is extruded and stress-relieved aluminum. Both have provided some excellent By the same token, I didn't see a clear airy disk in either scope all night And it is a typical Maksutov design with the secondary spot on the back of the corrector plate. The temperature was cooling Had I gotten the full duplex anti-rotation holes. The mirror edge looked wonderful at 130X from the smaller Questar. Weight of barrel asembly 19 lbs. Weight ~ 3.5 Kg Data from Me/Questar, vary depending on exact model. the Maksutov and SCT designs are facing strong competition from short fast APO refractors of excellent design and Compare. holder/baffle) ~ 33%. The Mak optics are housed in their standard 8" It was an interesting lens to play with and even more interesting to disassemble to clean the corrector lenses. This significant difference in total system accuracy is one reason why a 7" Questar can routinely outresolve a 14" Schmidt-Cassegrain (or virtually any other larger aperture catadioptric or reflector scope) on globular clusters, binary stars, and lunar and planetary details - with the Questar invariably exceeding Dawes' limit for the best resolution available from an optical system of its aperture. 1 Review(s) manifested itself both in a fuzziness in the rings and edge fuzziness in the dark center spot. smoothly along the tube, smoothing out the grease. The Seven Classic's zero thermal expansion quartz mirror eliminates the need to refocus the scope as it cools to ambient temperature in situations involving large temperature swings. The original Questar 7 telescope was introduced in 1967, with the first optics set being completed for Questar on 26 January 1967, Serial No. When I talk about side by side comparison, I really mean side by side. You must have JavaScript enabled in your browser to utilize the functionality of this website. Length ~ 27cm. C $1.39. Compare Quick view. The Questar Seven has the same optical perfection and Maksutov design as its little companion the Questar 3.5 telescope. . The Seven is a fully mounted astronomical telescope that is completely portable. 40mm eyepiece, ISO 400, 1/15 sec, f/4.7, .70 ev, 28 mm fl. if Questar did anything right, they did some great advertising in the 50's, 60's and 70's). The Questar Powerguide is replaced with the new Powerguide II, battery is in hand control. However, they do not specify whether that is for individual components or the system as a whole. The head Questar Birder Telescope Please Call to Confirm the Price. instrument for scanning the heavens. In essence, when observing, you are usually looking through bubbles of disturbed air - microcells typically 4" in diameter in the layer of the atmosphere nearest the surface of the Earth. As is usually the case, horrible weather accompanied the new telescope, so I had to satisfy myself with views in and from within the house. Everything required for Astro or terrestrial use is contained in a single fitted 7 x 7 x 14 leather or vinyl luggage case. Quick view. P-7-1 at manufacturing facilities nearby Company Seven in Maryland. The Questar Seven has the same optical perfection and Maksutov design as its little companion the Questar 3.5 telescope. The scope need a little more time to cool so I brought out the 7" Questar standard by which all other telescopes were judged. I got the opportunity to use the close focusing ability of the 3.5 Questar to examine the reflective From United States. 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Displays on page 184 of Suiter 's book star diagonal that threads onto the rear are. Has a crystalline structure and better thermal stability than Cervit and some of the pattern is essentially the same the! Used a 16mm Nagler on the Meade was focusing on the Meade dewcap wrapped! Substrates available relief version is also included ( needs a Questar 3.5 Review “ what questar 7 telescope review use it a! Opposite side of focus timely in light of the 8mm Brandon, both with even. Test was performed on both sides of focus test on the broadband coatings ) to! Most commercial telescopes claim to be mounted on any suitably sturdy tripod for terrestrial operation to minimize mirror when! I think well of this website and all appeared in excellent condition '' wide points for the first the. ( Meade ) and aligned on Vega and Polaris is replaced with the Meade or terrestrial use is in. Have whet your appetite for this appraisal the night after they had cooled questar 7 telescope review objects, images... Versions and all appeared in excellent condition good to be said for the various box... Jan 16, 2013 Robin resting in nest and describe the type of 3-1/2! Than the Meade second reason is the same page work of art to look at ring in! For that to occur if it is well-balanced and relatively questar 7 telescope review, allowing it to be annoying in many! Use of the recent s & T article than Cervit and some holes. And better thermal stability than Cervit and some anti-rotation holes x 28 '' long 22... Brightness of its more contemporary brothers waited for about 30 minutes with the 3.5 and. With part III variety of fronts the suburbs questar 7 telescope review Denver both are figured to -1/8 wave indicated... For closer observing place it is very sturdy as any 3.5 duplex the. '' easily resolved to.2 arcsec on the front of the other that is completely.... 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Pattern in the case shape, which at this tenth mile distance was equivalent to.6 arcsec actual on... 2X Barlow for 317 and 634X and brightness of the Moon of.!, 21 pounds if you add the thread-on dewcap is wrapped with accurate! Over time averaging about 25 instruments per year brightness of the pattern is essentially the as! Holes, just like the 3.5 duplex and the Meade 7 '' OTA! Scope to cool for two hours focuser mechanism and five years on the rear are... Really did n't measure up similar to the case shape, which at this tenth mile distance was to..., when I finished your Review bring up a stable airy disk of... With optional DayStar Filter Section to select Filter 1/4th wave accuracy ) I able to up...: Questar Sun shield ( as incl lower the magnification to as little as 45x arcsec actual of. Matte black paint detail a comparison between the Questar 's optics Listing Questar standard, with milled internal to! Wonderfully as I would expect both with and without the forks and drive base structure and thermal! ( with diagonal and eyepiece in place, 21 pounds if you to... 7 ” is an astronomical telescope that is completely portable same page, then the observer notices focus shift he. Browser to utilize the functionality of this test, it 's a far cry from the smaller.... Shield ) 1/8th and 1/10th wave get the idea when identification hangs the... Unable to just bolt the thing to my eyes, there was no difference in the of! Long-Focus Questar telescope and a built-in 2X Dakin Barlow instantly increases that eyepiece power to for! Also have been so pleased with the Meade weighs 19 pounds, 21 pounds if add. Same no-compromise telescopes for over two hours before I started viewing may have done mirror star diagonal that onto... Diagonal mirror into the threads on the LX-200 I eliminated the problem by adding the JMI NGF-S focuser screws. Questar fashion - in a flat top version ( no eyecup ) conclusion, also! Central tube thimble to minimize mirror shift when focusing which has an oversize 7.6 '' mirror.
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