Sigma has been reluctant to release their 19mm, 30mm and 60mm lens for X mount. I suggest we do some pushing to make them understand that there is room for cheaper and reasonably good lens on X mount. Having more manufactures produce lens for Fuji system would increase competition and should probably decrease prices and/or increase quality in long run. So even if you don't plan on buying Sigma it would still benefit you if they released lens for X mount. It would be great if you dropped them a short message about this: Contact Us | Sigma Thank you!