Explore Scientific 12-inch Dobsonian Telescope Generation II Truss Rod
BEST SELLER
BEST SELLER
Description
Easy portability with quick set up and tear down by one person, the 12-inch primary mirror with 1372mm of focal length Truss Tube Dobsonian can be transported anywhere. The superior components include a 2-inch two-speed rack & pinion focuser make for precise focusing. The large bearings on altitude and azimuth offer smooth pointing and stability. With the use of the optional 30mm 82 Degree Series Waterproof Eyepiece, you can visually achieve a true field of view of 1.8 degrees with a 6.7mm exit pupil for amazing ultra-wide field deep sky viewing with a limiting visual magnitude of about 14.2 in optimal viewing conditions.
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 our optional coma corrector.
Specs
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
Warranty
Limited Warranty is one year, which converts to the Explore STAR Transferrable Product Warranty when product is registered within 60 days of purchase.
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Description
Easy portability with quick set up and tear down by one person, the 12-inch primary mirror with 1372mm of focal length Truss Tube Dobsonian can be transported anywhere. The superior components include a 2-inch two-speed rack & pinion focuser make for precise focusing. The large bearings on altitude and azimuth offer smooth pointing and stability. With the use of the optional 30mm 82 Degree Series Waterproof Eyepiece, you can visually achieve a true field of view of 1.8 degrees with a 6.7mm exit pupil for amazing ultra-wide field deep sky viewing with a limiting visual magnitude of about 14.2 in optimal viewing conditions.
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 our optional coma corrector.
Specs
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
Warranty
Limited Warranty is one year, which converts to the Explore STAR Transferrable Product Warranty when product is registered within 60 days of purchase.