A telescope with achromatic lenses.
Newtonian telescope
It is called a refracting telescope.
The Hubble Telescope uses both mirrors and lenses to focus on images.
A reflecting telescope forms an image by using a combination of curved mirrors to focus light. It was invented as an alternative to the refracting telescope.
Refracting telescope.
The focus is between the two lenses, closer to the eyepiece
Refracting Telescope.
the reflecting telescope uses mirrors and lenses. The refracting telescope does not include the mirrors.
A reflecting telescope.
the reflecting telescope uses mirrors and lenses. The refracting telescope does not include the mirrors.
Concave Mirrors
refractor