Re: Exposing infrared film for more than 3 seconds

["David J. Carlyon" <david@xxxxxxx>]

I don't see why it wouldn't work, if you picked the right aperture, to get
the correct light needed for the exposures. Getting that right aperture
might take some testing though - not only would you have to figure out the
brightness of the flash on the subject, at the distance needed, but how
much infrared light the flash puts out.

David
http://scc.net/~david/Photography/

At 01:24 PM 10/27/98 GMT0BST, you wrote:
>Hi,
>
>I want to know if you can expose high speed infra red film for more
>than 2 to 3 seconds. I want to place infrared filters on the camera
>lens to block out visible light and only allow infra red radiation to
>pass through. This way I can do my experiment in dim light, possibly
>in blue-green light or something.
>
>I plan to take a photo of a golf swing and fire a series of strob
>lights so that I get a series of club positions on the film.
>There will be reflectors on the club to reflect infrared radiation
>into the camera.
>
>Will there be a problem of infrared luminesence if I expose the film
>for so long? Are the films available in the market fast enough to
>capture the images?
>
>Thanks
>
>David
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