Peak #1983

The special feature of the 1983 measuring magnifier is the extremely large field of view and measuring area in relation to the 10x magnification. The optical system consists of four lenses subdivided into two groups. Fifteen different black scales and fourteen white scales are available for these measuring magnifiers (see overview): These magnifiers are coated to prevent reflection.

Specifications:

• magnification 10x
• achromatic glass lens
• Anti-reflex
• focussable
• Okular 20mm
• Standard scale included (30mm/1mm)
• Field of view Ø 32mm
• Dimensions: Ø 46 x 44mm
• Weight 74g
• Pouch included

Summary

Chromatic aberration is caused by a lens having a different refractive index for different wavelengths of light (lens dispersion), meaning that different colors focus at different distances from the lens. Longitudinal and lateral chromatic aberration of a lens can be seen as "fringes" of color around the image.

Chromatic aberration of a single lens causes different wavelengths of light to have differing focal lengths.

An achromatic doublet has the same focal length for red and blue light.

Chromatic aberration can be minimized by using an Achromatic Lens or Achromat, in which special optical materials with differing dispersion are assembled together to form a compound lens.