You asked
Best budget lens for the fujifilm x t50?
Here is what the site says about that.
From Fujifilm X-T50: Fujifilm X-T50: A mirrorless camera by Fujifilm with a 40.2-megapixel APS-C sensor, announced in 2024. Specs - Maker: Fujifilm - Mount: Fujifilm X - Sensor: APS-C, 23.5 x 15.6mm, crop factor 1.5 - Resolution: 40.2 megapixels - Stabilisation: in the body - Announced: 2024 - Type: mirrorless camera Focal lengths on it Lenses frame like 1.5 times their focal length on full frame: 16mm like 24mm, 23mm like 35mm, 33mm like 50mm, ...
From Your first camera: How to split the budget: Spend roughly as much on lenses as on the body, or more. A modest body with a great lens takes better pictures than a flagship body with a cheap zoom. A sensible first kit: 1. The body with its kit zoom, for everything. 2. A cheap fast prime, a 50mm f/1.8 or its APS-C equivalent, for people and low light. See lenses. 3. A spare battery and a decent memory ...
Quoted from this site's pages.