You asked

Best budget lens for the panasonic lumix gh7?

Here is what the site says about that.

From Panasonic Lumix GH7: Panasonic Lumix GH7: A mirrorless camera by Panasonic with a 25.2-megapixel Micro Four Thirds sensor, announced in 2024. A video camera first: internal ProRes RAW and no recording limits worth worrying about. Specs - Maker: Panasonic - Mount: Micro Four Thirds - Sensor: Micro Four Thirds, 17.3 x 13mm, crop factor 2.0 - Resolution: 25.2 megapixels - Stabilisation: in the body - Announced: 2024 - Type: mirrorless camera Focal lengths on it Lenses ...

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.

From these pages