Fresnel lens
A convex lens
convex lens
convex
A convex lens.
ocular lens
Fresnel lens
A convex lens
convex lens
convex
A convex lens.
diverging lens
Concave lens would diverge the rays.
The energy that enters any kind of camera through the lens is called light.
A convex lens
24-105MM Zoom Lens is the best for me.
projector have concave or convex