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.

All our equipment is currently on loan to other members.

Available Eventually

The following list of equipment is currently loaned out to a member, and may include other members waiting to also borrow.

DSLR with SCT Adapter

Newly added 14 days ago on September 12, 2020 (Saturday).

Currently there are 1 requests to borrow this.

Older Canon XTi  DSLR camera body with T-ring and Adapter for attaching this camera to a Schmidt Cassegrain Telescope. Suitable for Lunar and Planetary photography.

 

Currently Unavailable

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

ZWO ASI120MC-S Imaging Camera

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

The waiting list for this equipment is filled and new requests are temporarily on hold.

The ASI120MC-S is a color USB3.0 camera. primarily intended for planetary imaging, but it can be used for deep sky imaging with some limitations.

Sky-Watcher Star Adventurer Mini Tracking Mount

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

 

Temporarily unavailable for new requests due to long waitlist.

Note: This equipment includes a small equatorial mount that must be carefully polar aligned and may be confusing for beginners.

Star Adventurer Mini is a high precision, portable and stable tracking platform for sidereal, solar and lunar tracking with automatic DSLR shutter release control. It is useful as a tracking platform to capture wide-field images of the Milky Way, or as a compact travel mount. The Equipment Manager can provide advice on setting up the equatorial mount.

A Star Adventurer Latitude Base is included and provides a smooth and reliable way to polar align your mount. With internal gearing the Latitude Base makes aligning to the north celestial pole easy and repeatable.  A MeFoto GlobeTrotter with a ball head is also provided.

Astrophotography Kit-Ultrastar CCD

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

 

The waiting list for this equipment is filled and new requests are temporarily on hold.

This astrophotography kit is designed capable amateur astronomers who wish to learn the basics of imaging with CCD cameras. It includes the same model 80mm ED APO (apochromatic) refractor (Meade 6000) with reducer/flattener and the same Celestron AVX telescope mount as the Advanced CCD kit, along with an entry level CCD camera (an Ultrastar Color CCD with a resolution of 1392 x 1040 pixels), a reducer/flatener, a Windows 10 laptop preloaded with the necessary software and drivers, and all the necessary cables and power supply. The borrower should understand how to align and use an equatorial mount and must supply a laptop computer to operate the camera. There is no guide camera. The short effective focal length of the system allows unguided exposures of a few minutes, which can then be stacked during post processing

Ultrastar-C Specifications:
CCD - Sony ICX825AL ExView2 monochrome CCD
Pixel count - 1392(H) x 1040(V)
Pixel size - 6.45 x 6.45uM
Optical size - 8.98 x 6.71 mm
Input connection - ‘Mini B’ USB socket for USB2.0
Output connection - Standard RJ12 autoguider socket

Portable DSLR Astrophotography Kit

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

The waiting list for this equipment is filled and new requests are temporarily on hold.

Note: This equipment includes a small equatorial mount that must be carefully polar aligned and may be confusing for beginners.

This is a complete portable astrophotography kit which is suitable for wide-field astro-imaging.  The equipment includes a Sky-Watcher Star Adventurer equatorial tracking mount, Berlebach mini tripod, astronomy-modified Canon T3i with a 50mm and a 100mm lens, assorted cables, a Pelican case for the mount and camera, and a zipper bag for the tripod).  It comes with a manual to familiarize the user with the assembly, use, and care of the Star Adventurer equatorial tracking mount. The Equipment Manager can provide advice on setting up an equatorial mount.

Advanced Astrophotography Kit-ZWO Pro CCD

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

 

Temporarily unavailable for new requests due to long waitlist.

Note: This package requires the user to provide a laptop computer, install the necessary drivers, and polar align an equatorial mount.

This astrophotography kit is designed for imaging deep sky objects by capable amateur astronomers. It  includes a Meade Series 6000 APO ED APO (apochromatic) 80mm refractor, a Celestron Advanced VX telescope mount, a ZWO ASI294MC Pro cooled camera with a reducer/flattener, and all the necessary cables and power supply. The borrower should understand how to align and use an equatorial mount and must supply a laptop computer to operate the camera. The short effective focal length of the system allows unguided exposures of a few minutes, which can then be stacked during post processing 

The Meade Series 6000 80mm APO triplet refractor uses extra-low dispersion optical glass to provide excellent color correction, contrast, and sharpness.

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: