Telescope Refractors

Refractor Telescopes

In the simple sense refractor telescopes are those that use lenses as their goals intended to be attained rather than mirrors and were the basi type of telescopes, the type you may imagine Galileo using. They were original produced in the early 1600′s in Holland before Galileo made his own version and made it the well known instrument we still use today.

The goal to be attained lens (the one at the front of the scope) bends light rays towards a focal point where we may view the effigy through an eyepiece. The bending of light rays like that is known as refraction, hence the name refracting or refractor telescopes. Modern refractors have lenses which are designed to reduce the aberrations which would other than as supposed or expected take place and blur the resultant images. They are not perfective nevertheless and so numerous chromatic or spherical aberration is still visible exceptionally on for less models.

As refractors gather light with their lenses and as exposure depends on the diameter of those goal to be attained lenses, they tend to become big and heavy the more one wants to see! Professional refractors may be rather massive but they do fabricate splendid views. Small refractors on the other hand are fabulously easy to use and set-up quickly for casual observation. Up to diameters of 90mm (three and a half inches) or so they offer great looking at while likewise supplying easy portability and storage.

Refractors also tend to carry out better in city and suburban emplacements where light pollution may be an issue so if you are likely to do most of your watching from the city or suburbs a refractor is a good choice in most circumstances. They require little maintenance and offer splendid casual observing, perfective for city rooftops and suburban backyards.

If you’re looking for a dual-purpose telescope suitable for both terrestrial and celestial viewing, then the AstroMaster Series is for you. Each AstroMaster model is competent of giving rectify views of land and sky.

General Features:

• Quick and easy no-tool set up
• Permanently mounted StarPointer
  

Erect effigy optics – Ideal for terrestrial and astronomical use

Quick release dovetail attachment – no tool set up

Pan handle Alt-Az control with clutch – for smooth and precise pointing

The AstroMaster Series manufacture bright, clear images of the Moon and planets. It is easy to see the moons of Jupiter and the rings of Saturn with each one of these fine instruments. For views of the more brilliant deep space objects like galaxies and nebulae, we commend the larger aperture and light gathering capacity of the Newtonian reflectors.

Specs

• Optical Design: Refractor
• Aperture: 70 mm (2.76 in)
• Focal Length: 900 mm (35.43 in)
• Focal Ratio: 12.86
• Eyepiece 1: 20 mm (0.79 in)
• Magnification 1: 45 x
• Eyepiece 2: 10 mm (0.39 in)
• Magnification 2: 90 x
• Mount: Altazimuth
• Optical Coatings: Fully Coated
• Weight: 18 lb (8.16 kg)
• Finderscope: Built-on StarPointer
• Tube Attachment: Dovetail Bar
• Star Diagonal: Erect Image Diagonal – 1.25″
• Tripod: 1.25″ steel tube legs
• CD ROM: The Sky L1
• Highest Useful Magnification: 165 x
• Limiting Stellar Magnitude: 11.7
• Resolution (Rayleigh): 1.99 arcsec
• Resolution (Dawes): 1.66 arcsec
• Light Gathering Power: 100 x
• Angular Field of View: 1.1 °
• Linear Field of View (@1000 yds): 58 ft (17.68 m)
• Optical Tube Length: 36 in (914.4 mm)

2-year Telescope Warranty

CELESTRON TWO YEAR LIMITED WARRANTY

A. Celestron warrantees your telescope to be free from defects in materials and workmanship for two years. Celestron will fix or replace such product or portion thereof which, upon inspection by Celestron, is found to be faulty in materials or workmanship. As a condition to the obligation of Celestron to fix or replace such product, the product ought to be returned to Celestron together with proof-of-purchase satisfactory to Celestron.

B. The Proper Return Authorization Number ought to be received from Celestron in advance of return. Call Celestron at (310) 328-9560 to receive the number to be displayed on the outside of your shipping container.

All returns must be accompanied by a written statement setting forth the name, address, and daytime telephone number of the owner, together with a brief description of any claimed defects. Parts or product for which alternate is made shall become the property of Celestron.

The client shall be responsible for all costs of transportation and insurance, both to and from the factory of Celestron, and shall be required to prepay such costs.

Celestron shall use reasonable attempts to repair or replace any telescope covered by this warranty within thirty days of receipt. In the event fix or substitute shall require more than thirty days, Celestron shall notify the client accordingly. Celestron reserves the right to replace any product which has been discontinued from it is product line with a new product of comparable value and function.

This warranty shall be void and of no strength of effect in the event a covered product has been altered in design or function, or subjected to abuse, misuse, mishandling or unauthorized repair. Further, product malfunction or deterioration due to normal wear is not covered by this warranty.

CELESTRON DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WHETHER OF MERCHANTABILITY OF FITNESS FOR A PARTICULAR USE, EXCEPT AS EXPRESSLY SET FORTH HEREIN. THE SOLE OBLIGATION OF CELESTRON UNDER THIS LIMITED WARRANTY SHALL BE TO REPAIR OR REPLACE THE COVERED PRODUCT, IN ACCORDANCE WITH THE TERMS SET FORTH HEREIN. CELESTRON EXPRESSLY DISCLAIMS ANY LOST PROFITS, GENERAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES WHICH MAY RESULT FROM BREACH OF ANY WARRANTY, OR ARISING OUT OF THE USE OR INABILITY TO USE ANY CELESTRON PRODUCT. ANY WARRANTIES WHICH ARE IMPLIED AND WHICH CANNOT BE DISCLAIMED SHALL BE LIMITED IN DURATION TO A TERM OF TWO YEARS FROM THE DATE OF ORIGINAL RETAIL PURCHASE.

Some states do not concede the exclusion or limitation of incidental or consequential damages or limitation on how long an implied warranty lasts, so the above limitations and exclusions may not utilise to you.

This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

Celestron reserves the right to alter or discontinue, without prior detect to you, any model or style telescope.

If warranty difficulties arise, or if you need assistance in using your telescope contact:

Celestron
Customer Service Department
2835 Columbia Street
Torrance, CA 90503
Tel. (310) 328-9560
Fax. (310) 212-5835

Monday-Friday 8AM-4PM PST

NOTE: This warranty is valid to U.S.A. and Canadian clients who have purchased this product from an authorized Celestron merchant in the U.S.A. or Canada. Warranty outside the U.S.A. and Canada is valid only to clients who purchased from a Celestron’s International Distributor or Authorized Celestron Dealer in the specific country. Please contact them for any warranty service.