Orion ED102T CF #9530 Parts List, Getting Started, Functions and Features, Retractable Dew Shield

Congratulations on your purchase of an Orion ED Triplet Carbon Fiber Refractor. Your telescope has been designed with high quality precision optics and excellent mechanical construction. The dual- speed (11:1) Crayford focuser will make getting sharp images a breeze and reduce image shift to almost zero. The three element objective lens offers excellent color correction. These instructions will help you set up and use your telescope.

Parts List

ED80T CF

Optical tube assembly Threaded metal objective cap 1.25" eyepiece adapter 5mm hex key

Hard carrying case

ED102T CF

Optical tube assembly Threaded metal objective cap 1.25" eyepiece adapter Tube rings

Dovetail mounting plate 4mm hex key

Getting Started

The ED Triplet Carbon Fiber (ED T CF) refractors come fully assembled from the factory. The telescope’s optics have been assembled and collimated at the factory, so you should not have to make any adjustments to them.

Please keep the original shipping box. In the unlikely event you need to ship the telescope back to Orion for warranty repair service, you should use the original packaging. The box also makes a very good container for storing the telescope when it is not in use.

Functions and Features

The ED T CF refractors have several features designed to maximize the use and enjoyment of your telescope. When you have become familiar with all of the functions of your ED T CF refractor, you will be ready to begin using your new telescope under the night sky!

Retractable Dew Shield

All ED T CF refractors feature a retractable dew shield (Figure 1.1-1.2) which allows the telescope to become more compact for storage. The dew shield’s primary purpose is to prevent

Focuser tension setscrew

Focuser lock thumbscrew

Figure 2. Locate the focuser tension set screw to change the tension for heavier loads.

dew (water condensation) from forming on the lens during cold and humid nights. The dew shield is also useful for reduc- ing glare under unwanted outside lights. To extend the dew shield, remove the optical tube dust cover by unthreading it counter clockwise, then loosen the dew shield lock thumb- screw. Pull the dew shield outward until it stops and retighten the dew shield lock thumbscrew.

Dual-Speed Crayford Focuser

The ED T CF refractors come equipped with dual-speed Crayford focuser (2" for the ED80T CF and 3" for the ED102CF). The Crayford design allows for smooth, precise focusing without the image shift that rack-and-pinion designs experience.

For quick focusing of your ED T CF refractor, the two larger silver focus knobs will provide a coarse focus. For more pre- cise focusing, as needed for applications such as critical high power planetary observing and digital imaging, the smaller black focus knob (Figure 1.1-1.2) offers fine focus adjust- ment. The fine focus knob rotates eleven times to one single rotation of the coarse focus knobs, making an 11:1 ratio for extremely precise focusing.

If you find that the focus adjustment is too hard to turn or if the drawtube slips under the weight of your eyepiece or camera, you can make adjustments to the focuser tension by using the focuser tension set screw located on the bottom side of the focuser (Figure 2). Make adjustments to this set screw until the focuser motion feels smooth and holds in place when you have obtained focus. It may be necessary to make adjustments when the weight of your accessories change significantly.

3