black-cat
Striker
Thanks for your comments peach.Well I'll explain it thus, but I guess others would explain it better. When you are shooting into light or bright conditions your lens shuts down (gets smaller) to let in less light. Unless you counteract this ie by opening up your lens again (or keeping it open for longer), the overall picture will be under exposed.
That strange beam of light only seems to happen with digital cameras, it doesn't seem to happen with film photography (though you can get glare and lens image in the picture). I think if you reposition yourself it won't happen. If you look at your picture, the sun is too "bright" and the rest of the picture is too dark. But, the only way to learn is to take pictures and work out out what you like/don't like and see/find out how to do/not do the same again.
I learnt the hard way. I was an impoverished traveller sitting on a beautiful beach one afternoon. Took some shots of the sun and the waves (olympus trip) on a glorious day, and never to go back etc. Developed the film some months later, and every single shot was under exposed as I just thought shooting away at the sun would provide me with realistic pictures.