5D3 has no automatic follow-up focusing function for video shooting at all.

And the more professional video shooting, the less you will use the pediatric function of automatic follow-up focusing.

(It's not impossible, it's true that professional video shooting can't automatically follow focus! Must be manually controlled all the way)

Then, if you want to shoot a wedding and make money with this, don't hesitate to use 24-70mm, and your customers will look down on it with 24- 105.

Many people know about SLR now. 5D3+24-70 is the "top equipment" for wedding and shooting in many people's eyes. You have a lot of face when you go out with this, and you look professional in the eyes of laymen. Just pay the price when collecting money!

24- 105 is definitely a good start for your own use. If you want to take it out to make money, it will be a bit difficult and will definitely be looked down upon by snobbish customers!

As for anti-shake ... I have to practice by myself and learn how to stabilize the camera more stably at the moment of shooting.

Moreover, with the aperture of 24-70 F2.8 and the super ISO sensitivity of 5D3, it is not difficult to control the shutter for about 200 seconds.

My 5D3 has no pressure when driving to 6400 ISO in dark light, and its sharpness 100% is almost unaffected.

In addition to concentration, 5D3 has a high sense of success. You must believe him!

It should be said that 24-70 is better than 24- 105 in picture quality. But some people find that the sharpness of 24- 105 is better than that of 24-70, but this is only one aspect. After all, the gap between F2.8 and F4 is huge! This is the decisive difference between two heads!

But it is undeniable that without an anti-shake lens, filming a micro-film is almost worse. But if you buy the kind of SLR video stabilizer or rocker arm with stabilizing function, it will definitely improve the picture stability.