What type is it, Peter? I would love to have fish-eye as just in case lens. In fact I do have one. It`s miniscule 8mm f:2,8 specifically designed for APS-C, name Samyang.
But, but, but it comes in Samsung NX or Sony Nex mount. Difference is thickness. I have NX mount which is very close to Leica LTM flange alas, after removing bayonet mount it still does`t focus on infinity. Looks complicated and I havn`t figure the way procede further.