Plus Shipping & Crating. This is the main structural difference between Dobsonian and Newtonian telescope. Crisp images at f/5 so no coma corrector needed. The Obsession 12.5 f/5 is a premium telescope for observers that want the best of all worlds. 12" aperture f/4.9 reflector telescope gathers enough light for bright close-up views of the Moon and planets; Big reflector telescope provides sharp views of faint deep sky objects like galaxies, nebulas and star clusters; Simple Dobsonian point-and-view ease of use plus IntelliScope smarts equals a telescope … Newtonian telescopes do not travel well. A few other differences Dobsonian telescopes use thinner mirrors. The Zhumell Z12 Dobsonian telescope features a massive 12” parabolic primary mirror that captures a substantial amount of light and produces crisp, bright images free of spherical aberration. Big 12"-aperture optics provide bright views. The Orion Build-A-Scope 12 Truss Tube has the Dobsonian base with the IntelliScope computerized object locator. Sky-Watcher Flextube 250 Dobsonian 10-inch Collapsible Large Aperture Telescope – Portable, Easy to Use, Perfect for Beginners, White/Black (S11720) 4.0 out of 5 stars 64 2 offers from $1,547.99 The stand-out feature of this telescope is the altazimuth mount. Ease of use second to none. Super compact size that can be hauled in any car. You add your favorite accessories to create a customized telescope that fits your needs. Full thickness primary for perfect images. Dobsonian Telescopes – Named after Sir John Dobson in 1960. 12.5" f/5 Classic $4,495.

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