One of only eight of this exceptional telescope made – exceptional opportunity to purchase a part of history.
ULTRA ADVANCED LEVEL TELESCOPE – Exceptionally Rare Offer.
This is a telescope from my private collection. It is a used telescope and is being moved on as I simply do not use it. It deserves a home where it is actually used. It is one of the rare telescopes from my private collection that should move on to a new owner. This telescope is rare.
Exotica level telescope for the most experienced Advanced users. Exceptional highest capability & performance for those that wish to achieve much much more. Exceptional performance on the moon, planets, stars, double stars, star clusters, globular star clusters, nebulae and galaxies.
The optical systems utilized in the Quantum Series of Maksutov Cassegrains has been designed to give you the maximum contrast and resolution obtainable in a commercially produced catadioptric telescope. lnstead of the usual f/2 primary mirror of other compound tefescopes, the Quantum’s primary is of f/2.5 ratio. Secondly, a smaller secondary-mirror spot can be employed on the inside of the Quantum’s corrector plate. As a result, the central obstructions are only 33% of their clear apertures. Some competitive Schmidt-Cassegrains have central obstructions of 40% and 50%.
With the larger. central obstruction, these instruments image only 48% of the available light energy into the central Airy disk of a focused star image with the renraining 52% being scattered in the surrounding diffraction rings. CIearly, these telescopes cannot reproduce the delicate tonal contrasts on a lunar or planetary disk; such detail being washed out or completely submerged by the excessive light in the diffraction rings. The unique single-strut mounting was developed for the Quantum telescopes.
In addition to giving the Quantum a distinctive sculptured appearance, it allows for much greater flexibility in the design, selection, and use of accessories. It also permits more comfortable viewing and a freedom of operation you must experience to fully appreciate. The optical tube assembly dismounts instantly with a single knurled knob to allow its separate use as a terrestrial telephoto lens. This also means that an astro photographic camera platform can take the place of the optical barrel for ultra high resolution deep-sky photography.
Supply includes tube rings to enable you to mount the telescope to any standard premium quality Equatorial mount. Modern compound telescopes focus by varying the separation between their primary and secondary mirrors. In the Quantum, the movement of the primary takes place by turning a focus knob conveniently located on the right side of the barrel towards the rear. This side position makes operation positive and natural without introducing any difficulties when adding accessories which is in contrast to some instruments by other makers.
One notable advance is a total absence of image shift during focusing, a problem which continues to plague every other competitive design. This means that with the Quantum, optical alignment (centering) has reached a new level of accuracy and permanence, resulting in exquisite and reliable performance. Other standard features of the Quantum instruments include high-transmission AR coatings on the corrector lens, and enhanced aluminium coatings on the primary, secondary, and diagonal mirrors.
Each instrument is also equipped with a right-angle finder of large aperture. And, finally, the telescope is supplied with an original premium quality Quantum hard carry case. Quantum spared no effort to manufacture an instrument whose characteristics equal or surpass the best examples of commercially produced systems available today; and we believe that these superb telescopes combining as they do the valuable attributes of optical perfection and mechanical excellence will find wide and eager acceptance.
Each one will come to be treasured by its user as a source of rewarding satisfaction.
Optical Tech Quantum 8″ Maksutov Cassegrain Telescope Features…
* lnstead of the usual f/2 primary mirror of other compound telescopes, the Quantum’s primary is a significantly high quality f/2.5 ratio.
* High-transmission AR coatings on the corrector lens, and enhanced aluminium coatings on the primary, secondary, and diagonal mirrors
* Optical tube assembly dismounts instantly with a single knurled knob to allow its separate use as a terrestrial telephoto lens
* Designed to give you the maximum contrast and resolution obtainable in a commercially produced catadioptric telescope
Optical Tech Quantum 8″ Maksutov Cassegrain Telescope Specifications…
Optics Design : Maksutov Cassegrain
Clear Apertuture : 8.35″ (204mm)
Lens Type : BK7 meniscus Primary
Mirror Size : 8.85 ” (f/2.5)
Focal Ratio : F/15
Secondary Size/Obstruction : 67 mm secondary (33% obstruction)
Diffraction limited field : 15 mm
Control box with two viewing ports (90° diagonal et 0° axis)
Focussing : selectable by a moving tertiary mirror 1″1/4 and 2″ outputs, a selectable Barlow lens can be dialled into place to increase magnification by a factor of X1.75