hi just wondering some people are using the omnibounce (small plastic cap over the top of flash) while others are using the lumiquest (macham like umbrella/hood over the flash) to stimulate a bounced ceiling. what in your opinion is the better option and what are the differences? i find a home made bounce card quite insufficient to light up subjects taken in nature (eg. bird park/zoo). anyone knows any books available for EOS flash? 
