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- Path: sparky!uunet!pipex!bnr.co.uk!uknet!glasgow!jack
- From: jack@dcs.glasgow.ac.uk (Jack Campin)
- Newsgroups: rec.photo
- Subject: Re: Phantom lights-pse explain
- Message-ID: <BzGyoE.2vu@dcs.glasgow.ac.uk>
- Date: 18 Dec 92 19:12:13 GMT
- References: <1992Dec17.155604.1540@bmw.mayo.edu> <BzFs6H.F38@newsserver.technet.sg>
- Reply-To: jack@dcs.glasgow.ac.uk (Jack Campin)
- Organization: COMANDOS Project, Glesga Yoonie
- Lines: 19
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- dbsbanka@solomon.technet.sg (Teo Pit Koon) wrote:
- > how do you explain some of the photos which showed the transparent picture
- > of a group of persons with the wall (background) super imposed on it!
-
- Double exposure. The film wasn't wound on between shots - presumably the
- winder mechanism failed. It's easy to do if your camera allows you to fire
- the sutter without advancing the film; most cheap cameras don't, but
- mechanical failure or film slippage can produce the same effect.
-
- cheers - jack
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- --
- -- Jack Campin room G092, Computing Science Department, Glasgow University,
- 17 Lilybank Gardens, Glasgow G12 8RZ, Scotland TEL: 041 339 8855 x6854 (work)
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