DOBSONIAN TELESCOPE 8 inches (203mm) F/5.9
Description
- Affordable large 200mm aperture viewing delivers stunning viewing experience
- 78% brighter than 150mm model
- Patented tension control handle allows for precise slewing and maximum stability
- Parabolic primary mirror with Metallic High-Transmission Coatings (MHTC)™
- Heavy-duty rocker box with Teflon™ bearings
- 2-inch Crayford-style focuser with 1.25-inch adapter allows for use of nearly any eyepiece
Featuring large apertures and easy functionality, Sky-Watcher’s Classic Dobsonian is the ideal beginner scope. Often referred to as ‘light buckets’, Dobsonians provide users with the highest possible aperture for their money when compared to telescopes of a similar size, such as Schmidt-Cassegrains or refractors. Developed in the 1970s, the Dobsonian-style telescope is an inexpensive solution for bright, detailed visual observing using a simple design. The name ‘Dobsonian’ comes from the telescope’s inventor, John Dobson, a Buddhist monk and sidewalk astronomer who dedicated his life to astronomy outreach. Dobson was notorious for constructing large aperture reflecting telescopes capable of deep sky viewing, using low cost materials. These were often made with found materials, heavy cardboard tubes, recycled porthole glass, and plywood mounts. Dobson encouraged other astronomers to assemble their own telescopes and taught workshops on telescope making.
The Classic Dobsonian uses a parabolic primary mirror design, constructed of borosilicate, then polished and coated with our proprietary Metallic High-Transmission Coatings (MHTC)™, producing a remarkable 94% reflectivity. With an 8-inch aperture, the Classic 200P Dobsonian is 816 times brighter than the human eye! This simple yet effective design is perfect for visual observation of faint objects, such as nebulae, star clusters, and galaxies.
Supporting the Classic Dobsonian is more than just a simple rocker box. The base uses Teflon™ bearings for smooth, easy Azimuth slewing and a patented tension control handle to lock the telescope in place. Once locked on an object, the telescope can support both 1.25-inch accessories as well as the heavier 2-inch eyepieces, allowing you to use virtually any eyepiece on the market. As is customary with all Sky-Watcher products, everything is included with the telescope to get you up and running, including: two 1.25-inch eyepices, a 1.25-inch adapter, a 2-inch eyepiece adapter, dust caps and a 9×50 finderscope.
Bientôt en stock - Contactez-nous
$879.95
Description
Optical Info | |
---|---|
Optical Design | Newtonian |
Mirror Coatings | 94% Aluminum |
Glass Type | Borosilicate |
True Aperture (mm) | 257 |
Primary Aperture (mm) | 203 |
F/Ratio | 5.9 |
Focal Length (mm) | 1200 |
Secondary Diameter | 48mm |
Secondary Obstruction (by diameter) | 24% |
Secondary Obstruction by Area | 6% |
Observational Info | |
Dawes Limit | 0.57 |
Rayleigh Limit | 0.69 |
Limiting Mag. | 14 |
Minimum Magnification | 29 |
Maximum Magnification | 400 |
Light Gathering (compared to next size down) | 78% |
General Info | |
Focuser | 2″ Crayford |
OTA Length (Retract/Ext.) | 43″ |
OTA Outer Diameter | 9.375″ |
OTA Weight (with accessories) | 20 |
Dob Base Weight | 25 |
Dob Base Measurements | 29″x20.5″ |
Zenith Eyepiece Height | 45″ |
Accessories | |
Included Finder | 9×50 Finder |
Included Diagonal | No |
Included Eyepieces | 25/10 Super (modified Kellner) |
Magnification w/ Included Eyepieces | 48x/120x |
Included Case | No |
Corrector | No |
Reviews
There are no reviews yet.