5 reasons why your indoor photographs are blurry ...
DIANNE GILLILAND, NEW YORK INSTITUTE OF PHOTOGRAPHY:
"Your digital camera may perform magnificently in outdoor sunlight, but when you try to shoot close-up subjects in indoor light, everything looks slightly fuzzy. Why is that? Well, there are several contributing factors. Luckily, you don't need a lot of technical know-how to solve these issues and take sharper indoor shots."
Read more, here.