Best budget lens for the fujifilm gfx 50s?

Here is what the site says about that.

From Fujifilm GFX 50S: Fujifilm GFX 50S: A mirrorless camera by Fujifilm with a 51.4-megapixel medium format sensor, announced in 2017. The first GFX: an SLR-shaped body with a removable viewfinder and no stabilisation. Specs - Maker: Fujifilm - Mount: Fujifilm G - Sensor: Medium format (44 x 33), 43.8 x 32.9mm, crop factor 0.79 - Resolution: 51.4 megapixels - Stabilisation: none in the body; use stabilised lenses for slow shutter speeds - Announced: 2017 - Type: ...

From Fujifilm GFX 50S II: Fujifilm GFX 50S II: A mirrorless camera by Fujifilm with a 51.4-megapixel medium format sensor, announced in 2021. The cheapest way into medium format, and lovely files.

Quoted from this site's pages.