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Amazon.com : Telescopes for Adults Astronomy 900mm, Refractor Telescope with Phone Adapter and Adjustable Tripod, 70mm Aperture Portable Telescope for Kids Beginners with 2 Plossl Eyepieces : Electronics
![Telescopes for Adults Astronomy 900mm, Refractor Telescope with Phone Adapter and Adjustable Tripod, 70mm Aperture Portable Telescope for Kids Beginners with 2 Plossl Eyepieces : Electronics - Amazon.com Telescopes for Adults Astronomy 900mm, Refractor Telescope with Phone Adapter and Adjustable Tripod, 70mm Aperture Portable Telescope for Kids Beginners with 2 Plossl Eyepieces : Electronics - Amazon.com](https://m.media-amazon.com/images/I/51n9eZGz6KL._AC_SY580_.jpg)
Telescopes for Adults Astronomy 900mm, Refractor Telescope with Phone Adapter and Adjustable Tripod, 70mm Aperture Portable Telescope for Kids Beginners with 2 Plossl Eyepieces : Electronics - Amazon.com
![Amazon.com : Telescopes for Adults Astronomy 900mm, Refractor Telescope with Phone Adapter and Adjustable Tripod, 70mm Aperture Portable Telescope for Kids Beginners with 2 Plossl Eyepieces : Electronics Amazon.com : Telescopes for Adults Astronomy 900mm, Refractor Telescope with Phone Adapter and Adjustable Tripod, 70mm Aperture Portable Telescope for Kids Beginners with 2 Plossl Eyepieces : Electronics](https://m.media-amazon.com/images/I/71p0L6kYI-L.jpg)
Amazon.com : Telescopes for Adults Astronomy 900mm, Refractor Telescope with Phone Adapter and Adjustable Tripod, 70mm Aperture Portable Telescope for Kids Beginners with 2 Plossl Eyepieces : Electronics
When building a refracting telescope, does the diameter of the eyepiece matter? And why do we need to move the eyepiece (as in my textbook) if the image is always focused at
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