and field of view with up to 100x magnificationIntuitively positioned operating buttons and dialsSimple menu navigationSmooth zoom in even stepsHomogeneous and shadow-free illumination is provided by LEDs

and field of view with up to 100x magnificationIntuitively positioned operating buttons and dialsSimple menu navigationSmooth zoom in even stepsHomogeneous and shadow-free illumination is provided by LEDs

which is not in the form of a sphere. The image quality is significantly improved in comparison to simple spherical lenses and aberrations are prevented or reduced. What are diffractive aspheric lenses?