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INSTRUCTION MANUAL

IN 221 Rev. A 06/03

Providing Exceptional Consumer Optical Products Since 1975

Customer Support (800) 676-1343

E-mail: [email protected]

Corporate Offices (831) 763-7000

P.O. Box 1815, Santa Cruz, CA 95061

80mm f/7.5 ED Refractor

#9895 Optical Tube Assembly

Congratulations on your purchase of an Orion 80mm f/7.5 ED

refractor optical tube. Your 80mm f/7.5 ED has been designed

with high quality optics and excellent mechanical construc-

tion. The ED glass in the objective lens means you’ll enjoy

images with far less color distortion than those seen in a stan-

dard refractor, and the smooth Crayford focuser will make

getting sharp images a breeze. These instructions will help

you set up and use your telescope tube.

Getting Started

The 80mm f/7.5 ED comes fully assembled from the factory.

The telescope’s optics have been installed and collimated, so

you should not have to make any adjustments to them.

Please keep the original shipping box! In the unlikely event

you should need to ship the telescope back to Orion for war-

ranty repair service, you should use the original packaging.

The box also makes a very good container for storing the tele-

scope when it is not in use.

Attaching the Refractor to a Tripod or Mount

The 80mm f/7.5 ED can be attached to a tripod or mount by

the use of the 1/4"-20 mounting block. The 1/4"-20 shaft of a

sturdy camera tripod will thread into the hole on the mounting

block on the underside of the optical tube.

Optional tube rings can also be used to mount the scope to a

telescope mount. Tube rings with an inner diameter of 100mm

(3.9"), such as Orion item #7371, are needed. If you are using

tube rings, you should first attach them to your telescope

mount and then lay the optical tube in the tube rings.

Use of Optional Eyepieces, Diagonal, and Finder

Scope

The 80mm ED does not come with a finder scope, diagonal or

eyepieces in order to grant the user the greatest versatility in

customizing the instrument to suit their tastes. However, cer-

tain rules for using accessories still apply.

Any Orion finder scope with a dovetail bracket can be used

with the 80mm f/7.5 ED. Simply unthread the thumbscrew on

the dovetail mount (Figure) and insert the assembled finder

scope and dovetail bracket. Retighten the thumbscrew. Finder

scopes that do not use a dovetail bracket will need to be

attached by other means.

The 80mm ED can use almost any 1.25" diagonal and eye-

piece. Please note that the telescope will not come to focus

without the use of a diagonal or extension tube. To install a

diagonal, unthread the thumbscrew on the 1.25" adapter

(Figure) until it is flush with the interior of the adapter. Insert

the diagonal or extension tube and secure it with the thumb-

screw. Then insert the eyepiece into the diagonal or extension

tube and secure it with the thumbscrew.

Figure. The 80mm f/7.5 ED Refractor optical tube assembly

Dew/Glare shield

Machined aluminum lens cell

Finder scope dovetail mount

2" Crayford focuser

1.25" Eyepiece

adapter

Crayford focuser tension

thumbscrew

Focus wheel (2)

1/4"-20 mounting block

1 2 3 4

Specifications 3

Résumé du contenu

Page 1

INSTRUCTION MANUALIN 221 Rev. A 06/03Providing Exceptional Consumer Optical Products Since 1975Customer Support (800) 676-1343E-mail: support@telescop

Page 2

2Use of 2" Eyepieces and DiagonalsA feature of the 80mm ED is its ability to also use 2" barrel-diameter eyepieces and diagonals. At low mag

Page 3 - Specifications

3SpecificationsOptical tube: Seamless aluminumObjective lens diameter: 80mm (3.1")Objective lens: Achromatic, rear element made of ED glass,air-s

Page 4

4One-Year Limited WarrantyThis 80mm f/7.5 ED Refractor is warranted against defects in materials or workmanship for aperiod of one year from the date

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