Aloha Aydin & Marcus, I'll spill the beans on this since i've used ring's for years on most of my macro-work. A Daylight UV Filter that's double threaded will instantly correct the white color balance problem. The natural color will be restored. I've tried Polarizers but FL's give a more natural tone. Mahalo! CHRIS:) (Don't use the hotmail.com, it's only for Conch-L. Hate deleting everyday. Use [log in to unmask]) ---------------------------------------------------------------------- [log in to unmask] - a forum for informal discussions on molluscs To leave this list, click on the following web link: http://listserv.uga.edu/cgi-bin/wa?SUBED1=conch-l&A=1 Type your email address and name in the appropriate box and click leave the list. ----------------------------------------------------------------------