Ministerio de Educación (Spain)
Ministerio De Educacion: Instrumentacion Astronomica Modulo I Unidad 2
In this unit you will combine all the major components of a telescope to obtain the desired system for different types of astronomical observations.
Ministerio de Educación (Spain)
Ministerio De Educacion: Instrumentos Auxiliaries Modulo I Unidad 3
In this unit you will learn the main advantages and disadvantages offered by the refractor and reflector telescopes for a particular observation. You will also learn about the main types of telescopes.
University of Chicago
University of Chicago: Reflector and Refractor
From the Yerkes Observatory Virtual Tour web site. Compares and contrasts reflecting and refracting telescopes. A link from the page leads to a second page which explains why most modern research telescopes are reflecting telescopes.