Verlängerungsröhre
A Verlängerungsröhre, which translates to extension tube in English, is a mechanical device used to increase the distance between an objective lens and a camera sensor or film plane. This increased distance allows for closer focusing distances and therefore higher magnification for macro photography.
Extension tubes are hollow cylinders that contain no optical elements themselves. They are typically made of
There are two main types of extension tubes: manual and automatic. Manual extension tubes simply provide the
Extension tubes are a cost-effective alternative to dedicated macro lenses, especially for photographers who may only