The lens is the core part of your camera, and it can affect the quality of your photos in so many ways. Therefore, you need to choose the right lens for your SLR camera.
1) Look at the focal length. This can affect how well your camera is able to focus on the object.
2) Stability: Make sure that the performance of the lens is stable
3) Compatibility: Make sure the lens you choose actually fit the camera
4) Practical use: Lastly, try taking some shots in the store to make sure that the lens is good