So I'm new with my DSLR Canon xti Rebel 06'. I purchased this camera via craigslist and it's been working just fine. My question pertains to lenses. What lenses are good for doing portraits? As well as close ups and shooting scenery too? Any input would be helpful as I am trying to upgrade my camera and learn more about it with changing my lenses and such. Any feedback would be helpful. Thanks! =).