|
Date: |
|
Description: | Busch aplanatsatz lens F.8, 8 inch f.l., with a ring type iris diaphragm. Convertible lens. Interchangeable elements changes focal lengths. Front element has focal length of approx 11 inch and the back element has a focal length of approx 18 inch. When using single components the iris diaphragm has to be well stopped down otherwise a falling off of definition at the edges will occur. c. 1900 | License: | http://creativecommons.org/licenses/by-nc-sa/2.5/ | Subjects: | lens | Temporal: | c.1900 | Source: | Science Museum | Creator: | Emil Busch A. G. | Identifier: | 1979-559/1494 | Go to resource |
|
|