2nd Hiltons post.
***shoot in RAW mode, JPG doesn't cut it!***
take a picture of an 18% grey card (waterproof kind or laminate one). then (depending on your software), set your white balance using select as much of the grey card as you can. Adjust from there using balance fine adjustments.
here is a copy/paste of a post I put up earlier in the week (for Nikon):
- always shoot raw & with a tripod. Stock 18-55 will focus at about 11" out. Set camera to Aperture priority mode, set F11 to start with
- take a picture of a stock grey card which is a neutral gray in your tank. I picked up the card at a photo store and had it laminated
- turn off pumps!
- take pictures of some corals (aperture priority mode, start with F11, Iso 100)
- download the NX2 software from Nikons site (60 day trial)
- color balance against the card (
http://www.youtube.com/watch?v=qzvPVgRNk6k)
- copy settings
- open raw pictures of corals and paste settings (it's in the you tube link)
- adjust as needed
- save as JPG with another name
- post really cool pictures