Equipment Library

The Seattle Astronomical Society maintains a library of small and medium size telescopes that may be checked out for a period of 1 month by members in good standing. If you are new to astronomy, this is an excellent way to learn how to use a telescope and to begin viewing the wonders of the night sky, without having to invest immediately in a telescope of your own. To check out a telescope, please check out our equipment available for loan.

If you have any questions about borrowing equipment, or do not see a specific piece of equipment please reach out to our Equipment Manager.

See the complete equipment list in alphabetical order.

Keywords

You can narrow your search of our equipment library by selecting any one of the below keywords.

Astrophotography Basic Binoculars Camera Dobsonian Go To Maksutov Newtonian Push To Refractor Schmidt Cassegrain

Available Immediately

The following list of equipment is immediately available to borrow.

Meade 8 LX200

Currently there are 2 requests to borrow this.

 

 

The Meade 8 LX200  Schmidt-Cassegrain is an older, manually operated telescope on an equatorial fork mount. It will give good views of the moon, planets as well as nebulae, star clusters and galaxies. It has a 110V clock drive, with a manual solw motion control  that can be used to track objects if 110 V power is not readily available.

None of our equipment is loaned out to any members.

Currently Unavailable

The following list of equipment is not available to members until we are able to replace or repair parts.

Celestron NexStar Evolution 6 (#2)

Note  This item is being serviced and it is not available for check out.

PLEASE NOTE: This equipment is a duplicate Evolution 6 telescope and when available it will be loaned to the next person on the Celestron NexStar Evolution 6 (#1) wait list. Please DO NOT submit a request here unless directed by the Equipment Manager. Thank you.

 

 

Celestron NexStar Evolution 6 (#1)

Note  This item is being serviced and it is not available for check out.

Temporarily unavailable for new requests due to long waitlist.

There are two nearly identical NexStar Evolution 6 telescopes in the SAS Equipment Library. When one becomes available it will go to the next requestor from the queue below..

The Celestron NexStar Evolution 6 is a microprocessor controlled GoTo telescope. The SkyAlign alignment procedure is simple and only requires the user to point the telescope to any three bright stars.   Once aligned, the "GoTo" mode provides automatic slewing to a selected object. The telescope can be controlled using a traditional hand held controller, or it can be operated using a smart phone or tablet connected to the NexStar Evolution’s built-in WiFi network. The built-in  rechargeable battery will operate the telescope for up to 10 hours on a single charge. Ergonomic handles help with setup. Manual clutches in both altitude and azimuth offer flexibility to manually point the telescope when powered off. The 6-inch NexStar Evolution tracking accuracy is accurate enough to get started in astroimaging by attaching your DSLR camera.

The telescope also includes a "Red Dot"  finderscope, a  good quality 1.25” star diagonal, eyepieces, and an AC adapter.

Celestron NexStar 6 SE

Note  This item is being serviced and it is not available for check out.

 

Temporarily unavailable for new requests due to long waitlist.

The Celestron 6 SE is a current model altazimuth computerized Schmidt-Cassegrain telescope. The 6 SE features a relatively long 1500mm focal length (f/10) and a total weight of 30 lbs including the tripod. 

Celestron NexStar 8 GPS

Note  This item is being serviced and it is not available for check out.

 

Temporarily unavailable for new requests due to long waitlist.

The NexStar 8  GPS is an 8-inch Schmidt-Cassegrain telescope with Celestron NexStar  computer control.

200 mm aperture, 2000 mm focal length

This is a heavy and bulky telescope.  It may require 2 people to lift it. Your vehicle must accomodate three large boxes (32x20x14, 24x18x12, and 30x10x10 inches) to transport it.  The optical tube assembly is about 45 lbs.  This is not a beginner telescope..

 

 

Telescope Types

Types of telescopes

Copyright NIAAS, North Ireland Amatuer Astronomical Society

What are those numbers?

Types of telescopes

Copyright 2008-2012 Stormthecastle.com

The f-ratio is the focal length divided by the diameter of the telescope. Magnification is the focal length of the telescope divided by the focal length of the eyepiece.

Example

To find the f-ratio of a telescope 10 " in diameter with a 45" focal length:

Divide 45 " F.L. by10" D. to get an f-ratio of 4.5.

Compute Magnification

First, convert focal length to mm: 45" = 1146 mm, then:

1146 mm focal length divided by 35 mm eyepiece equals 33 magnification.

More Information

If you are interested in learning more about telescopes, we recommend: