View Full Version : Lighting requirements for high speed video

07-05-1994, 09:22 PM
Dear Biomch-l members,

We are about to sign contracts for the construction of an Aquatics
Laboratory at the University of Ballarat and I have been asked to
justify my design brief in regards to the amount of artificial light
requested for high speed video.

I seek (urgently) any practical example of an existing lab or pool with sufficient lighting, or your
opinion that the amount I have requested is neccessary.

The indoor pool is an 8 lane by 25m with viewing windows at one side and one end which
extend below and above water. The water at this end of the pool is
2.0m deep and basically white tiles will be used. Filming will be
restricted to this deep half of the pool. We currently use Panasonic
MS4 video cameras and I consider a shutter speed of one thousandth of
a second necessary to freeze the action.

I have specified a level of 1800 lux falling on the swimmers over the
filming area. This was established experimentally with our camera and
a lux meter and via a computer simulation used by local lighting
engineers. Still they wish for expert ( definition: >100km from
here!) opinion or an example building to cite. The issue is important
ot me because I cannot take my portable studio lights into this area
(safety, corrosion, too low direction).

Please forward comment if you think I have asked for too much or too

With grateful thanks

Keith McElroy
Senior Biomechanist
University of Ballarat