How to place the lens of SLR digital camera?

You can buy a special camera case directly and put the camera and lens together directly.

Only this kind of cover will be specially designed for different models. Otherwise, it will not be fixed on the camera (through the screw below, it will be fixed in the screw hole reserved for the camera to install the tripod).

This kind is more advanced, and some are simpler, such as this one.

This is more convenient for users who only carry one lens.

Of course, if you want to carry a lot of lens equipment, you need to buy a professional camera bag.