In late 1668 he was able to produce this first reflecting telescope.

On his back porch, though, he does use a 14-inch reflecting telescope.

And his studies in optics led to the first reflecting telescope.

The 1908 addition included a second dome and space for a new 37 1/2-inch reflecting telescope.

Towards the end of the 19th century very large silver on glass mirror reflecting telescopes were built.

In the early 1930s he constructed his first astronomical clock and at the same time a large reflecting telescope.

That got him to the parabola, and he explained the reflecting telescope.

Reflecting telescopes, just like any other optical system, do not produce "perfect" images.

They are used as objectives for large reflecting telescopes.

Isaac Newton has been generally credited with building the first reflecting telescope in 1668.