| Celestron 11 inch StarHopper Dobsonian
reflector astronomical telescope, 1255mm focal length [f/4.5], 2" helical focuser with
1-1/4" adapter, 25mm SMA eyepiece 1-1/4" [49x], collimation tool, Balance
system included. It is new in the box and has not been used or assembled.
We purchased the new scope several years ago and never got around to using it.
This scope is no
longer in production. Surprise someone special
with this great scope!!!
This scope is better (Premium
Quality) than the current Celestron StarHopper
Dobsonian scopes. It is faster (f/4.5), has a better glass mirror
(Pyrex) and the mirror is
multicoated. Compare and you
will see the difference. This scope cost more back several years ago when
they came out than the current lower quality model.
The 11" Star Hopper astronomical telescope has these Standard Features:
Precision annealed Pyrex primary mirror -
better glass than used by competitors, ensures faster temperature
stabilization and the highest steady quality optical figure. The same
glass as used on the Palomar 200-inch Hale Telescope.
Palomar Observatory
and look for the info marked 1934-36: A Pyrex Mirror.
- 11" (279mm) -- f/4.5 Focal Length 49.4"
(1255mm)
25mm SMA Wide Angle Eyepiece -- 1-1/4"
2" Helical Focuser with 1-1/4" Adapter
Premium Quality, Affordably Priced
Optics are diffraction limited
Pyrex Multi-Coated Primary Mirror
Teflon and Nylon surfaces guarantee smooth performing
mechanics.
Collimation Tool -- very useful and unique to
Celestron
Made in the U.S.A.
We have all the original accessories, boxes and papers
3 boxes: large tube box, mirror box and mount box
Important
differences between this scope and the current
Celeston StarHoppers Dobsonian.
- This scope is shorter and faster than the
current 10" and 12" Celeston StarHopper Dobsonian making it easier to
move and set up.
Focal Lengths (10" = 1270mm) (11" = 1255mm) (12" = 1500mm)
- This scope has a
Pyrex glass primary mirror and the
current models have the less stable BK-7 glass primary mirror. The
BK-7 glass is used for binocular prisms and refractor telescope lenses
but this is a reflector, not a refractor.
Pyrex is better and
costs more.
- This scope has a Multi-Coated Primary Mirror and the
current models do not.
Multi-Coated Mirrors transmit more light and that is better and costs more.
Astronomy Magazine
says, "Star Hopper® is a milestone on the road toward a better
commercial Dobsonian telescope. Star Hopper's innovative mirror, mirror
cell and adjustable altitude bearings, combined with its crisp, sharp
images more than meet what every Dobsonian owner hopes to have in an easy
to use, backyard telescope."
The Star Hopper Dobsonian telescopes are designed for beginners who
seek the best possible view of the faint Deep Sky objects while on a
constrained budget. These include advanced features that an experienced
observer will appreciate. Furthermore, these 6" and 8" aperture units
(introduced in November 1995) benefit from years of study of those
Dobsonian style telescopes already on the market; Celestron has improved
upon the competing standards. In December 1996 Celestron improved the
designs further and also introduced 11", 14" and a 17.5" aperture models.
|
History: This is basically a classic Newtonian reflecting telescope on
a "Dobson" style of simple mount. The optical design by an English
mathematician was first constructed by Sir Isaac Newton. This employs two
mirrors (a parabolic and an elliptical flat) to gather and reflect light
to focus at a point beyond the focuser; an eyepiece for viewing is placed
at the focuser. A good reflector can offer the best view per the dollar
especially of the faint, deep sky objects where light gathering power is
essential.
The use of a simple Alt-Azimuth mounting, lightweight mirror and
modestly priced components evolved from a goal of San Francisco sidewalk
astronomer John Dobson to get the most telescope possible into the hands
of the amateur observer for the lowest relative cost. Ideally by
developing a design which can be home made. This design remains the first
choice among serious deep sky observers, and it is not uncommon to find
custom or home made 8" to 36" aperture "Dobs" at the astronomical
observing events at dark sky observing sites around the U.S.
|
Celestron 8
StarHopper
Our scope is larger than this one which is used as an example.
Ours has a white mount not black. |
Noteworthy improvements over conventional economical Dobs include:
- Low Friction Altitude Bearing/Dovetail Pinion Balance System
- A unique, low-mass molded Pyrex primary mirror for better thermal
stability
- Unique adjustable Pinnacle Mirror Cell to support the low mass
Primary Mirror
- Multicoated, high reflectivity mirror coatings improve brightness
and contrast.
- Optics hand finished and tested on a 125 line Ronchi
- Weight -- about 95 lbs.
Celestron 11 StarHopper Dobsonian is on the far left side of the photo
Price
| Description |
Order # |
Price |
| Celestron
11 StarHopper Dobsonian astronomical telescope, 1255mm focal length [f/4.5], 2" helical
focuser with 1-1/4" adapter, 25mm SMA eyepiece
1-1/4" [49x].
Ours has a white mount not black.
No free shipping.
Lower price! Save $110 |
NS-00150 |
999.00
889.00
Yes this is still available |
Jorgen S. this email did not work
lymorkiew@yahoo.com on 1-11-2008 please try again!
The telescope ships by truck freight or UPS because of weight and size. There
are three boxes: large tube box 41 pounds, mirror box 21 pounds and mount box
39 pounds. The total weight for all boxes is about 100 pounds. Shipped from San Angelo, Texas 76903.
Back
 
Back
to Top
|
