Any convex lens bulges out from each side. It is thicker at the centre of the lens and thinner at the edges. I am supposing that a spherical convex lens has convexity on both sides, but on one of those sides the glass is so curved that it has the shape of part of a sphere.
It is lens. The lens consists of the lens capsule, the lens epithelium, and the lens fibres.
)( is a concave lens() is a convex lens
The ocular is the upper lens and objective is the lower lens
The objective lens
A crystalline lens is the lens in the human eye.
The pole of a lens is the midpoint of the lens' geometric axis. It is where the principal axis intersects the lens.
Double-convex lens
The best lens hood for a Canon 55-250 lens is the Canon ET-63 lens hood. It helps reduce lens flare and protects the lens from unwanted light.
The Shutter.
= A lens cap is a cover to a lens on a camera or camcorder.=
The upper lens is called the ocular lens or the eyepiece.
A convex lens is also known as a converging lens, while a concave lens is also known as a diverging lens.