7Artisans lenses have become quite popular with their best bang for the buck approach to lens design and they are bringing their glass to X-mount. They do not make the smallest or lightest lenses, but their optical performance for the price is quite good on Leica and Sony cameras. 7Artisans lenses can be found on Amazon and will be a good budget option to Fujinon glass. Even our sister site Leicarumors enjoys shooting 7Artisans lenses.