Hey guys! So I want a new lens for Christmas and I don't know which one would be best. Just wondering if you could help me out.. Here is what I have access to Canon EF 50mm F1.8 $129 Canon EF 70-200mm F4 L USM $719 Canon EF-S 18-135mm F3.5-5.6 IS $599 Sigma 18-200mm F3.5-6.3 DC OS Tamron SP AF 17-50MM F/2.8 XR Di II LD Aspherical (IF) It will be used indoors in pretty bad lighting. I'm the school photographer and have been trying to take pictures with my 55-250mm but it's really tough because of the huge zoom on it, I'd like something under 55 so the last three are the most ideal I think.