190MM APOCHROMATIC FLATFIELD ASTROGRAPH – AN ASTROPHOTOGRAPHERS DREAM TELESCOPE!!
The exciting new Maksutov-Newtonian from Sky-Watcher is just what astrophotographers and serious visual observers have been looking for. The Maksutov-Newtonian design combines the best features from the Newtonian Reflector and the Maksutov-Cassegrain to create a telescope design that provides truly stunning image quality, providing high-contrast, perfectly flat images, free from false colour. The Maksutov-Newtonian design provides large aperture Apochromatic performance, with exceptional field correction, in a compact, amazingly affordable package. Stars appear as classic pinpoints across the entire field. Perfectly optimised for modern DSLR cameras. The premium optics are housed in a robust rolled-steel tube for excellent mechanical integrity. Five internal knife-edge baffles are included to eliminate internal reflections and further enhance contrast.
The primary mirror is made from special Low-Expansion Borosilicate glass, similar to Pyrex, which has an exceptionally low coefficient of thermal expansion compared to regular glass types. In practice this means a quicker cool-down time to reach thermal equilibrium, without the reliance on a cooling fan, and during the cool-down process the mirrors will maintain a better shape, reducing distortions, allowing you to start observing sooner.
Both primary and secondary mirrors are finished with Sky-Watcher’s exquisite RAQ™ Radiant Aluminium Quartz coatings, which include layers of aluminium, dielectric tantalum pentoxide for enhanced reflectivity & protection and silicon dioxide, all combining for a brilliant, highly durable finish with 94% reflectivity that will last for years.
Compared to a similarly sized Schmidt-Newtonian, the Maksutov-Newtonian yields a sharper and more contrasty image. Naturally, the Maksutov-Newtonian is an excellent visual performer too!!
(NB: Dette produktet het tidligere Explorer-190MN DS PRO)
Egenskaper:
- Highest Practical Power (Potential): x570
- Diameter of Primary Mirror: 190mm
- Primary & secondary mirrors with Radiant™ Aluminum Quartz (RAQ™) coating providing up to 94% reflectivity with optimal durability and long term performance
- Diameter of Secondary Mirror/Central Obstruction: 64mm
- Telescope Focal Length: 1000mm (f/5.26)
- 9×50 Right-Angled Finderscope
- Supplied without Eyepieces
