I read in one of the forums that the person used a Tamron 28-75 2.8 for group shots also. Is this also a good choice? I know alot may depend on preference or what your shooting. The cost is a factor in my case right now. I don't have alot that I can spend but I don't want to get something that...

I am new to photography and I would like to know what would be a good, sharp lens for me to use? I asked about a couple of weeks ago and some of you use Canon 50mm f/1.8. What type of shots is this lens use for? I shoot mainly close-ups, inside & outside. I also shoot indoor & outdoor sports...