Recent removal    I took out the following passage  Barlow lenses have an unfortunate reputation in some quarters due to poor results given by the Barlows included with some inexpensive telescopes  These results however are perhaps better attributed to poor optics and shaky mounts permitting less practical magnification in these telescopes than to an inherent failing of Barlow lenses  While the entire article is uncited this bothered me especially since all the weaselwording makes it sound like someones OR