How does Canon 6D shoot children's photography with which lens?

24- 105 or 50 fixed-focus lens is recommended.

24- 105 has large focal length and high cost performance, and can be used indoors and outdoors. This focal length is the same as that of Quan Huafu EF lens, but it is only 24 70, which is three times more expensive than 24 105, and its performance, especially on the computer screen, is far from three times worse. Even most people can't see the gap when they look at JPG format with the naked eye.

There is a special 24 105 lens forum, and some people with good skills have made good films.

There are also many poor craftsmen who use 24 70 to shoot bad movies.

24 105, the focal length is more complete, with anti-shake, enough to shoot children. What is not enough is actually your own photography skills.

24 105 is not bad, Quan Huafu EF lens is quite good, but when it is used on a half-frame machine, the wide-angle viewing angle is equivalent to 38.4, and there is no wide angle.

50 fixed-focus lens, high-quality portrait lens, Canon 50 lens has two types, 1.4 and 1.8. Although the aperture is similar, but the price difference is much, it is recommended to buy expensive ones (1.4), 1.8 is rough in workmanship.

I hope my answer can help you. I hope it can be adopted. Thank you.