What lens do you use to shoot the model?

Look at the machine and environment you use and the effect you need.

Full-width machine, the environment portrait is 35mm, the bust is 50mm to the whole body, the bust is 85mm, and the close-up is over 135mm.

Half a picture, the environmental portrait is about 20mm, the bust is 35mm to the whole body, the bust is 50mm, and the close-up is more than 85 mm.