Photographic filter pack and filter holder
US4383735A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 5, 1980 |
| Grant date | May 17, 1983 |
| Priority date | — |
| Expiry date | Sep 5, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B11/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A combination photographic filter pack and filter holder attaches to the front of a camera lens and comprises first and second housings, the first housing being connected to the second housing, preferably in a slideable and nesting manner. The first housing defines a storage area for retaining a plurality of photographic filters, and the second housing comprises an arrangement for removable attachment to the front of a camera lens, and a space for slideably receiving filters from the storage area of the first housing and for retaining the received filters in an operative position in registration with a camera lens. Any or all of the filters from the storage area in the first housing can be slid to the operative position within the second housing as desired. The housings also are disengageable for replacement of the filters contained therein. Also disclosed are various filter frames for use with the combination filter pack and filter holder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.