Originally Posted by M_Six
Here's an example. (Not my shot.)
Although looking through this thread on POTN I see several such images and they all have two things in common: they're taken with the 10-22mm and they have cloudless blue skies.
likely 3 things in common: under exposure elsewhere in the image. Unless they are using a device to stop down the sun it's nearly impossible properly expose an image with the in the frame.
BTW, i should have put a disclaimer up with the link i posted above saying i'm not responsible for the amount of money you'll want to spend on filters after watching that video.