Fisheye lens for UAV

How to make your UAV have wider FOV? You should make a change of your lens of your UAV. 
I ever purchased some kinds of fisheye lens to replace the original onein our UAV, but the result is not satisfactory, the FOV isn't wide enough for me, and I found the image is blur, especially the edge. 
Last month, I purchased a 1.05mm fisheye lens  SA-010528FEB  from Fuzhou Siaon Optoelectronic Technology Co., Ltd.
The lens is very goods, with 245°x245°x245° FOV, 10MP resolution, 1/2.3" format.
I try it in my UAV. the image is better than before. If you want to make a change of your lens in UAV, you could make a try of the fisheye lens from Fuzhou Siaon.