Since 550D has been set, if we pursue the image quality and the quality of scenery films:

Scheme for the poor: 550d+Tuli1224+501.8: Poor people hang poor gold wide-angle, and occasionally use spittoons as sugar water slices, which is the standard landscape scheme for the poor.

Scheme for the rich: The cost-effective 550d+1740+501.8:1740 is used as a wide-angle lens, and there will be no lens in the future.

It is not recommended to fix the dog's head from the beginning. 18 135 is also a mid-range dog head. The picture quality is ridiculous and the price is outrageous. If you want to buy second-hand, you will find that many people sell dog heads second-hand, which can save a small sum of money, because the picture quality is really ridiculous.

In order to supplement the commonly used and telephoto lens segments, I will consider the dog head like 18 135 when I am proficient. Personally, I suggest directly considering 70 200 Guo Xuwei as the telephoto end. After getting on the full-frame machine, I will take a normal shot like 24 70, which is a more reasonable upgrade sequence scheme.

PS:

If there are many landscapes, it is necessary to climb mountains well. We have to get up in the dark at three o'clock to shoot the sunrise and get ready to shoot the sunset at four o'clock in the afternoon. Real landscape photographers are more bitter, second only to the most bitter wildlife photographers.

I suggest you refer to Waiting for Bright People's Posts and Telecommunications Press.

hope this helps