Shop Magazine
%SALE%
EN / $
✓ Europe's largest astronomy equipment retailer
✓ 7,500+ items available from stock
✓ Personal advice & service
Your partner for astronomy
Telescopes Mounts Eyepieces Filters Telescope accessories Astrophotography Solar Observation Binoculars % SALE %
Glossary > Telescopes > Optics > Lens design

Glossary | Telescopes | Optics | Lens design

Doublet

A refractor with two lenses. Compared to an achromat, it displays significantly less chromatic aberration and more contrast.

Triplet

A lens telescope that almost completely corrects chromatic aberration. It consists of three lenses and offers very high optical performance thanks to its design.