Details of exhibit
- Exhibition:
- 1902 Forty-seventh Annual Exhibition of the Royal Photographic Society of Great Britain
- Exhibit title:
- Focussing Cooke Lens, and the same with Unicum Shutter
- Exhibitor:
- Taylor, Taylor & Hobson, Ltd.
- Section:
- Scientific, Technical and Photo-Mechanical Exhibits
- Exhibit No.:
- 436
- Description:
- This lens contains within itself a means of focussing objects at various distances from the camera. Focussing is accomplished by rotating the front ring of the lens mount, which bears an engraved scale of distances. The turning of this ring changes the focal length of the lens, so that focussing can be effected in rigid cameras without bellows or other means of extension.
- Exhibit type:
- Photographic equipment and supplies
- Process:
- [Not Listed] ()
- Award:
- none
