1Tanker wrote in post #14747060
When it comes to impromptu shots of family..especially kids, you don't always have time to run grab the flash, put it on, and set it up.
While sort of true, that is a mostly irrelevant statement.
If the lens one uses is not fast enough to take a picture of an active child (and the child is one of your main subjects), you grab the flash (or it is already set and ready). If not expect a good number of blurred images. Otherwise set the camera's ISO real high and have noisy images.
For me, my camera and flash are right next to each other, if needed I can grab both at almost the same time. I would think this is similar for most people, especially if they shoot where flash is often needed.
Then, if someone keeps there camera out for a quick shot, they should know the lighting in their house, and if it typically requires flash with the lens they use. If it does, then the flash should be on the camera or on a bracket with flash.
If one is out somewhere with the kids, then one will quickly decide if flash is needed or not.
Impromptu shots are not the typical family shots. They happen, but it is probably not the main reason people get (or should get) a general lens. In some houses (like my house) f/2.8 is not enough most of the time without flash. If flash is used, then an f/4 would work too (but if you look back I still agreed with getting an f/2.8).
I'm just trying to help the OP by pointing out f/2.8 isn't always enough without flash.