How to focus a wobbly telescope

Many telescopes vibrate too much to focus but only if you're touching the focus knob. This video has solutions.


The Bahtinov mask on Wikipedia
http://en.wikipedia.org/wiki/Bahtinov...

You can make your own
http://www.deepskywatch.com/Articles/...
http://www.skyatnightmagazine.com/bah...


Places where you can buy one:

http://www.telescopes.com/telescope-a...
http://www.adorama.com/searchsite/def...
http://www.amazon.com/s/url=search-al...
http://www.spike-a.com/

Motorized focus
http://www.jmitelescopes.com/buy_moto...


The telescope shown in this video is the Celestron NexStar 5SE. It was used to make the video of Jupiter. The Celestron NexImage 5 was used in 640x480 mode.

The eyepiece is an X-Cel LX eyepiece from Celestron.

X-Cel LX Series eyepieces
http://www.celestron.com/c3/category....

The "finder scope" is actually a green laser I bought from Orion
http://www.telescope.com/catalog/sear...

The scope is equipped with "Bob's Knobs" for easy collimation without using any tools
http://bobsknobs.com/


The Teaching Company has many great courses on DVD related to astronomy

Our Night Sky
http://www.thegreatcourses.com/tgc/co...

Understanding the Universe: An Introduction to Astronomy, 2nd Edition
http://www.thegreatcourses.com/tgc/co...

Many more
http://www.thegreatcourses.com/tgc/se...