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This video is intended for inexperienced, beginning amateur astronomers.
The video is an overview of refracting telescopes and includes a discussion of refractor design, advantages of refractor telescopes, a discussion of chromatic aberration (false color) - what it is, what causes it, and ways to reduce or eliminate it, including use of doublet and triplet lenses and ED glass in the objective lens.
Field distortion is defined, and the use of field flatteners is presented as a means of eliminating field distortion.
Price points of different types and sizes of refracting telescopes is discussed, including representative examples of typical costs.
Music in this video is "So My Love - Instrumental Version", by Anthem of Rain
freemusicarchive.org/music/an...