Can you guys please help me as i am new to uw photography:) i have rx100 w ikelite housing, i ´m still learning with it, but i would still like to improve my pictures - what would you reccomand me as next upgrade? Are the wide angle lenses really worth the prize - i ´v been looking for ikelite w30 which is actually pretty $$$ or should i better go for flashlight? Red filter? And do you have any basic setting for uw pictures with rx100, i ´m using mode "P", iso 100, F 1.6, auto wb right now.. And one more:) how can i manually adjust white balance with white plate? not so necessary for still, but may be usefull for movies i guess?