I have a query in regards to Canon lenses (and it may be a stupid one). I know with the L series lenses (which I'm tempted to buy today) that if you take 24-105 for example on a crop frame camera it will end up being 36-whatever. However on lenses Canon has "designed" for crop sensor cameras does it take this into account? For example is the 18-55 really 18-55 or does it end up being 24-whatever even though Canon say they're designed for crop sensors?