Hi guys I am new here and new to the hobby. I have a Sony A100 DSLR with the kit lens. I am look at getting a few different types of lens. ONe I am looking at is a Sigma 28-300mm 1:3.5-6.3. What all could I use this lens for? After doing alot of reading I see people talking about the f# number for indoor shots. What is good? Dose anyone have a list of what type of lens are ood for the differnet types of shooting? I want to get lens for indoor, out door fast sport shots, and general wildlife and family shots around anywhere. Any help would be great.