[matthew]

(Matthew? Compare your F828 with your Olympus lenses? I want petals!)

Try this one out: http://www.lenshoods.co.uk/hoods/Olympus....5-5.6.php

The f717's minimum focal length equivalent is 38mm? The above link is for a lens with a 58mm thread and a minimum 28mm focal length, so it won't give as good coverage as it could. Another one to try is this one:

http://www.lenshoods.co.uk/hoods/Olympus....5-4.5.php

It's for a lens with an 80mm-e minimum focal length, but I expect that you'll figure out how to do a hybrid that won't vignette. There's also the option of using a hood that's specific to the focal length range that you're using, but that gets very complicated.

Other cameras may give better results -- I would think that anything with a similar focal length to the F717 and a 58mm thread could be made to fit.