Objectives

Objectives are optical systems that are used to form an upset imagine from an object; this imagine can
be observed directly, for example with a microscope. In addition to the constructive characteristics, an objective differs
for its brightness, for its focal length and for the size of the covered photogram.
The achromatic objective is typical for microscopes; it can be used in a huge variety of applications, where a particular
sharpness of the image is needed.