10M target lighting

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peepsight
Posts: 479
Joined: Mon Sep 25, 2006 9:12 am
Location: London England

10M target lighting

Post by peepsight »

Any body suggest a good light that will illuminate a 10m target from about 5 feet distance. It must comply with the ISSF rules of 1500 lux minimum at the target face and must not cast any shadows across the target. If you have a suggestion please give me the light's spec.
Thanks.

Peepsight
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RobStubbs
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Joined: Mon Mar 01, 2004 1:06 pm
Location: Herts, England, UK

Post by RobStubbs »

From that distance you'll need at least one 500w halogen spotlight. You're best off with a light much closer to the target and a lower wattage, otherwise your back wall with look too bright, unless it's painted darker. Whatever you choose, get a lux meter to check it - you can pick them up cheap on ebay.

Rob.
peepsight
Posts: 479
Joined: Mon Sep 25, 2006 9:12 am
Location: London England

10M target lighting

Post by peepsight »

Hi Rob

Sorry for the delay in saying thanks.

After much experiment, we managed to get a reading of 1700 Lux at the target face using a lux meter. The ISSF minimum rule is 1500 Lux.

We achieved this by using a 75w mains powered halogen 'spot' lamp with a 10 degree light angle. Don't use the flood version as it is a 30 degree angle. The light is white, has no shadow, no flare or light scatter and is good on the eye. The lamp maintains readings above 1500 lux up to 55 inches away but then begins to fall off above this.
The ISSF also say that the target light levels can be much higher than 1500 lux if the shoot is being televised. They don't state what level thus i suspect it will be down to the TV crew as to what level they want?

It may be a good idea for the forum admin to store this info for future reference.

Peepsight.
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RobStubbs
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Location: Herts, England, UK

Post by RobStubbs »

That makes sense, a 10 degree v 30 degree light band should give approx 10 x more light per watt (over an inch square). It does however give very directional light and can cause more shadows. You need to make sure the non target areas are sufficiently light to be both within the rules and comfortable to shoot under.

Rob.
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