Details of exhibit
- Exhibition:
- 1906 Fifty-first Annual Exhibition of the Royal Photographic Society of Great Britain
- Exhibit title:
- Oblique coma. Details of pencil in zones and at foci. The complete foci are shown in blue and yellow, the blue portions being filled by other zones not shown.
- Exhibitor:
- C. Welborne Piper
- Section:
- Scientific and Technical Photography and its Application to Processes of Reproduction
- Group Title:
- Models of Light Pencils, showing various effects of Aberration
- Exhibit No.:
- 280
- Exhibit No. 2:
- [4]
- Description:
- NOTE: - Models [1] to [4] are made from 8-inch Achromatic Meniscus lens, which concave surface towards object: and represent action of lens when set to copy on scale of about 1/3 full size, with apertures varying from f/6 to f/12; the proper working aperture being f/22. The models are full size in tranverse section and 1/5 full size in length. The lens is at left side of model in every case.
- Exhibit type:
- Photograph
- Process:
- [Not Listed] ()
- Award:
- medal
