Details of exhibit
- Exhibition:
- 1911 Fifty-sixth Annual Exhibition of the Royal Photographic Society of Great Britain
- Exhibit title:
- Grandac Rapid Telephoto Lenses f/10
- Exhibitor:
- J. H. Dallmeyer, Ltd.
- Section:
- VI. Photographic Apparatus & Materials. Professional Photography
- Exhibit No.:
- [974]
- Exhibit No. 2:
- [4]
- Description:
- giving focal lengths from 25 in. to 50 in., giving
At 6 in. extension a focal length of 25 in. and a rapidity of f/10.
At 8 in. extension a focal length of 30 in. and a rapidity of ƒ/12.
At 10 in. extension a focal length of 35 in. and a rapidity of ƒ/14. - Exhibit type:
- Photographic equipment and supplies
- Process:
- [Not Listed] ()
- Award:
- none
