Barlow lens

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11	VOYAGER® 4.5 INCH FAMILY TELESCOPE MODEL[removed] Add to Reading List Source URL: www.bushnell.com Language: English - Date: 2012-09-19 15:06:57 Telescope types Optics Laboratory equipment Eyepiece Optical devices Magnification Barlow lens Reflecting telescope Collimated light Telescopes Lenses Observational astronomy
12	PDF Document Add to Reading List Source URL: www.project-nightflight.net Language: English - Date: 2013-02-02 12:16:14 Technology Telescopes European Space Agency Astrophotography Space art Eyepiece Webcam Barlow lens Collimated light Observational astronomy Astronomy Lenses