He read the small print using a magnifying glass.

The speculum of this bird has a very beautiful color.

In physics class, I learned about the properties of convex mirrors.

This magic mirror came from China.

He attached a new reflector to his bicycle.

He was observing the stars with a telescope.

He is good at reading mirror writing.

He conducted an experiment using a spherical lens.

He is an expert in ethology, and his research is highly regarded worldwide.

He likes to take a walk in the park at dusk.