I am really new to DSLR photography, I have recently bought a Canon 60D with the 18-55mm kit lens plus a 50mm 1.8 prime lens. I really only take pictures of my kids, they are 11 & 13 yo so are indoors alot of the time.

I am considering what my next lens purchase should be and thought about the Sigma 10-20mm as this fits my budget (around $600).

I'm would really appreciate any feedback or advice anyone has as to best options for lenses for indoors within this budget.

Thanks

Nicole