![Cloyster Astronomy Telescope Eyepiece Lens Focal Length 6mm/20mm Eyepiece Optical Lens Astronomical Telescope Accessories : Amazon.in: Electronics Cloyster Astronomy Telescope Eyepiece Lens Focal Length 6mm/20mm Eyepiece Optical Lens Astronomical Telescope Accessories : Amazon.in: Electronics](https://m.media-amazon.com/images/I/61+rVV5TgzL._AC_SS450_.jpg)
Cloyster Astronomy Telescope Eyepiece Lens Focal Length 6mm/20mm Eyepiece Optical Lens Astronomical Telescope Accessories : Amazon.in: 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
![An astronomical telescope has an eyepiece of focal-length 5cm. If the angular magnification - YouTube An astronomical telescope has an eyepiece of focal-length 5cm. If the angular magnification - YouTube](https://i.ytimg.com/vi/WDPW9wsZgVA/maxresdefault.jpg)