Modern designs with many lens elements, however, can correct for this, and viewing at high power becomes more comfortable.

A front lens element- sometimes referred to as a cell.

What does this have to do with checking your lens elements for scratches and dust?

The first eyepieces had only a single lens element, which delivered highly distorted images.

A bigger rear lens element allows for more eye movement, which can make watching a performance more comfortable.

To do this requires lens elements of different compositions and different shapes.

These filters are often an internal part in the assembly of lens elements.

With the addition of extra electrodes, liquid lens elements can take on tasks other than just focusing.

The optical construction consists of 21 lens elements divided into 15 groups.

This means the rear lens elements are as close as possible to the sensor.