Lens Comparison: Canon 100-400mm Vs Sigma 150-500mm

I've recently bought myself a new lens, the Canon EF 100-400mm f4.5-5.6L IS USM, to use instead of my trusty Sigma 150-500mm f5-6.3 DG APO OS HSM.  I love the Sigma lens, so why the desire to change ...??

Let me point you to an interesting article ....

"The iPad, One Year On" although, to quote the article, I'd have prefered to have called it "The iPad - the great love/hate device where both sides are equally right"!  Anyone who read my post 'iPad - big iPhone or small Laptop?' will understand when I say ..  

Marmite!

Yet Another 'Must Have' iPad Apps Selection

OK so this is a very personal view on the 'must have' apps for the iPad, but these are the ones I really wouldn't want to be without anymore.  So, in no particular order ....

iPad - big iPhone or small Laptop? Well, both really ...

There's not much that creates such extremes of reaction like Apple products do.  And the iPad must be the one that has created even more extreme (and often ill-informed) opinion than anything before.  And yet, those who use it appear to love it - so what has it got that these users feel is worth the five-hundred or so quid it costs?