OnLeaks and Smartprix say that the S25 Slim’s camera system will include a 200MP main camera, a 50MP ultrawide camera, and a 50MP telephoto lens with 3.5X optical zoom. The telephoto lens will apparently have a special design:

Some unofficial Galaxy S25 Slim renders attempt to reveal this long-rumored model's measurements, including being just 6.4mm thick.

A leaker produced the Galaxy S25 Slim renders, which make the design look incredibly boring, but that's perfectly fine.