On Aug 26, 2006, at 12:31 PM, Kostas Kavoussanakis wrote:

>> Tulip shaped hoods are a compromise too. ;-)
>
> How?

Any lens hood is a compromise on a zoom lens at some point or  
another. A tulip shaped hood gives a little more coverage than a  
barrel shaped hood, but only in a four-pronged shape that has edges  
which must be oriented correctly or you get vignetting. And it's  
harder to fit a hood cap  with a more complex lens hood shape.

Godfrey

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