Which of Canon's big ternary lenses is suitable for photographers?

It is not recommended that you buy 2470. The reason for this is the following：

24-70, medium focus zoom lens, really excellent, excellent image quality and practical focal length. At first glance, it looks perfect and has no shortcomings, so Da Sanyuan has always been the suit that photographers want to collect first. On the other hand, the wide-angle end of 24-70 is not wide enough, and the telephoto end is too short. The aperture of 2.8 is still too small compared with the fixed-focus lens, and the image quality is not as good as that of the fixed-focus lens, which is more expensive and heavier than the sum of several fixed-focus lenses.

If you are an amateur player who only wants to take one lens for the time being, it is unrealistic to buy this lens, and the high resolution is not what ordinary people need. The lack of wide angle and telephoto limits your study and progress. It's better to buy a slightly amateur one with stronger zoom ability, such as 24- 105, or even a cheaper one 18-200. The picture difference doesn't matter for the time being.

If you are an advanced player, you should know that different themes need lenses with different focal lengths. A lens with a medium focal length in triple zoom will affect your creative space. Why don't you add a few fixed focal lengths (better picture quality, lower price and larger aperture), or 14-24, or 70-200, or even some special lenses such as shift axis and macro to better activate your creativity.

If you were an expert, you wouldn't ask this question. Maybe you should start with the big three yuan and all kinds of bull heads and use them flexibly according to your needs. Maybe you just choose your own needs and shoot your favorite theme.