Galileoscope: 25x magnification eyepiece focal point

090721-1100333
http://www.flickr.com/photos/waiferx/3744253607/
Originally uploaded by Waifer X

Using a ballpoint pen to identify the focal point of the 25x magnification eyepiece of the International Year of Astronomy 2009 Galileoscope (www.galileoscope.org).


090717-1100296
http://www.flickr.com/photos/waiferx/3734666664/
Originally uploaded by Waifer X

View through the Galileoscope 25x eyepiece, showing the ballpoint pen tip used to identify its focal point.

Photo and video by Cuesta College Physical Sciences Division instructor Dr. Patrick M. Len.