Hello fellow photo forum friends I just had a childrens photoshoot on Sunday and I think my pictures turned out great (for being a beginner) - feedback appreciated! However, they have a slight blur, if I zoom in they are not as clear as I am used to. I shoot with a Canon XSI and I used my 28-80mm Tamaron lens. I made myself shoot Manual (to ensure I am learning) ISO 400. This 1st picture: 5.6 aperature, 1/30 Shutter Speed. Is this a lens focus issue? an ISO issue? help please!