Glossary
 

Glossary

Breadcrumb

Glossary > ASL (Aspherical) Aspherical 
ASL or Hybrid Aspherical lens is often found in Sigma and Tamron lens specs and is a special type of aspherical lens that is bonded onto a normal spherical lens. This is less expensive to manufacturer than aspherical lenses and allows a much more compact optical construction without the need for multiple elements - one reason why compact cameras can have such large focal length ranges these days.