25mm isn't wide on m43. It'll give you same fov as 50mm ff. 17m will be wider, but it's still not classic ultra wide. If you shoot bmpc, you'll have even higher crop ratios.
Some more wides around 200. panasonic 14mm f/2.5, rokinon/samyang f/3.5, panasonic 20mm, meike 12mm f/2.8, meike 6.5 f/2, samyang 12mm f/2, and cheapest quality zoom; panasonic 12-32mm f/3.5-5.6. Samyangs and Meikes are manual focus