This page is available in two viewing options to assist the visually impaired. The number of times a lens multiplies the image. The working distance between the lens and the object where the image is sharply defined. The maximum area seen through a magnifier.
Spherical aberration distorts the image.
Color aberration separates the colors of the spectrum. Lenses which are ground with variable radii or a combination of lenses or various types of glass spaced or stacked to form a lens system. All of the above factors are variables that must be taken into consideration in selection and use of a magnifier. Each of these factors affect the other. Aberrations are more predominate when lenses are used at improper focal lengths, especially in the stronger powered lenses.