Celor lens
| Introduced in | 1898 |
|---|---|
| Author | Emil von Hoegh |
| Construction | 4 elements in 4 groups |
| Aperture | f/4.5 and 6.3 |
A Celor lens (also known as a symmetric dialyte) is a highly corrected lens of the Dialyt type, designed for process photography, involving reproduction at or near 1:1 scale.