This is a Generation II telescope. All updates have been performed on this telescope. No telescope type has changed the hobby quite as much as the Dobsonian. Before the introduction of the Dobsonian by John Dobson, the vast majority of amateur telescopes consisted of small telescopes with primitive mechanics - barely enough to see the polar caps of Mars or the rings of Saturn. Larger telescopes, such as the Schmidt-Cassegrain were reserved for the wealthy. The ingenious combination of simple yet effective mechanisms with the greatest possible opening gives the Dobsonian telescope a unique triumphant march around the world. Nowhere do you get as much light for your money like a good Dobson. Disassembly of the scope without tools ensures a trouble-free transport of this great scope even in small cars. The entire structure has been optimized for maximum stiffness with minimal weight. The combination of high altitude bearings with optimized aluminum structures allows fine adjustment flows at high magnifications.

The ideal workhorse for the deep sky observers. A 305mm mirror collects more than 1,800 times as much light as the naked eye. Details on planets and deep sky objects will be visible even for inexperienced observers. Bright star clusters are resolved to the core, and the sight of the terminator on the moon is an unforgettable experience.

Includes 2" focuser with helical gearing and 10:1 reduction; LED Red Dot Finder, collimation assist tool; soft light baffle and two radial main mirror fan for fast temperature equilibrium.

The scope is ready for the use with the optional coma corrector.

Simulated views with 25mm and 10mm eyepieces, with and without a 2x Barlow Lens

Limited Warranty is one year, which converts to the Explore STAR Transferrable Product Warranty when product is registered within 60 days of purchase. Click Here to register.

To download printable PDF manual Click Here

Specifications

Item Number	DOB1245–01
f/ratio	f/5
Focal length	1,525 mm
Primary mirror diameter	35 cm
Secondary obstruction	24%
Mirror cell support points	9
Truss pole length	88 cm
Truss pole diameter	20 mm
Secondary cage assembly diameter	38 cm OD
Secondary cage assembly weight	6.5 pounds
Secondary cage assembly height	17 cm
Mirror box/rocker box height	42.5 cm
Mirror box weight *	50 pounds
Height to center of eyepiece at zenith	142.24 cm
Theoretical limiting stellar magnitude	0.38 arc sec
Theoretical Rayleigh limit	0.45 arc sec
Theoretical limiting magnitude	15.11 mag
Theoretical maximum magnification	600x
*	Mirror weight can vary because of the manufacturing process; these values are approximate