Sony NEX5T is for personal use, please provide the lens.

Originally, it has its own focal length 16-50, which is suitable for shooting small humanistic movies with scenery or people+scenery. Most portraits are taken in full-length, and self-portraits can be satisfied.

If you want to continue with advanced lenses, it depends on what you like to shoot.

If you like portrait shooting, pursue photos with blurred background and strong layering, or like shooting at night, then the fixed focus of 50F 18 is the most suitable, cost-effective and practical. The disadvantage is that the distance is fixed, which means that if you want to enlarge the subject in the picture, you need to move forward. This lens is also suitable for shooting small objects and knickknacks.

If you like to shoot close-ups of non-portraits, or like to travel and shoot distant things, then you may need to match a SEL552 10 lens to make up for the telephoto lens of your original lens. However, personally, it is not as practical as fixed focus 50F 18.