I love my 50mm f/1.8, but I mostly shoot my kids with it and I feel like I have to back up a lot to get them in the frame. It's frustrating for me especially when I'm in a small room and I can't physically get any further away. I also have a 24-105 f/4L lens and I love it, but it doesn't do indoor shots as nicely (obviously...the f/4) and I love the bokeh I get with the 50mm. I was wondering if there is another lens that would allow me to be closer but would still have the large aperture? I am wondering if it distorts the subject. I've heard that a portrait lens is ideally closer to 100mm?? (Is that correct?) Why is that?