Good Lighting

[Dratsabylgu]

For good lighting you need the correct color and enough light.

If you wanted to use LEDs the the color temp should be 6000 - 6500 K this is the same color temp as normal daylight.
And you need lots of light so go for something like this http://www.ledssuperbright.com/30w-led- ... -led-p-226
For even more light on the right place I will try a stage lighting lens like this http://www.thomann.de/nl/search.html?xs ... 12180=Lens
I ordered both types (120 mm fresnel and DC) to test and compare.

Also very important for filming under water is backscatter, this is the reflection of light on particles floating in the water.
To minimize this backscatter its important to place you lamps so that the reflecting light can't reach the lens of the camera.

[ERIEWRECKDIVER]

Please let us know how this goes. I've been experimenting with color correction and stage lighting gels, with LED's and standard fixtures. But I'm not ready to make any statements yet. LED's are bright but there are some issues with light scatter. I am also wondering if IR lighting and IR cameras might not be an option.

Anyway. Best of luck.

[Maximus Rumpas]

Hi,

My understanding (and I accept that I might be wrong) is that in general the light source should be placed behind the camera and to avoid backscatter, situated a suitable distance apart to each side. As shown – Dscent303.

I have taken my inspiration from the excellent ROV designed by Jonas Reiffers - Descent303.

I would welcome your comments as you both have the relevant experience.

Kind regards
Max

Descent303
http://www.rov.cc/index.php?option=com_ ... &Itemid=56

Seoul P7 Emitter
http://www.led-tech.de/en/High-Power-LE ... 21_78.html

Alunatec
http://www.alunatec-shop.de/

[Dratsabylgu]

http://www.uwphotographyguide.com/backs ... underwater

Place 2 lights left and right from the camera and use narrow beam lights so that particles in the water don't get illuminated.

In the picture section A and B are the lights and in these lightbeams backscatter can occure.
In section C there is no light so particles in the water will not produce backscatter.

backscatter.png (34.71 KiB) Viewed 4884 times

[Dratsabylgu]

Seoul P7 Emitter
http://www.led-tech.de/en/High-Power-LE ... 21_78.html

+ color temp is 6300
+ output is 800 lumen

viewing angle of 130°
this is ok for navigation lighting, but is too much for video or photography
for video or photography you can use a cheap fresnel lens