Which one is better, 16-35 or 50mm fixed focus lens?

Both are very good.

1. The 16-35mm lens is a small wide-angle lens, suitable for shooting travel scenery, humanities, food, children, etc. This lens has a relatively low value retention rate, is relatively expensive, heavy, and has average performance.

2. The 50mm lens is suitable for shooting portraits, weddings, street photography and children. The lens is relatively easy to handle, relatively affordable, and lightweight.

If users like to shoot humanities and sketches, they can choose a 35mm fixed focus lens. If users like to shoot portraits and children, they can choose a 50mm fixed focus lens.