Hello everyone, I'm new to this hobby, recently purchased a Canon Rebel XTI with a 28mm-135mm lens. I'm needing to take some close up macro shots of some jewelry that I sell at my shop for selling online. I tried using this lens I got, but I'm not able to get close enough to be able to read the engravings on the jewelry. Can anyone recomend a decent lens for this? I don't want anything fancy, and I am on a budget. How are these aftermarket lenses like Sigma? Will they work fine? Can any of you recomend some models I can look into? I'm looking for the most cost effective solution. Please be specific, because I am new, and honsetly I really don't know much. Still learning. Thanks. Gord.