Quote Originally Posted by Jeff Kubach View Post
Go with the FD 17mm it might cost you a few extra bucks, but it is worth it in the wrong long!

The FD 17mm lens Jeff is a semi-fisheye that produces curvo-linear perspective which is why I bought the FD 20mm f2.8 as an ultra wide lens in preferance , the Tamron SP is also a recto-linear lens that produces more conventional ultra wide angle images .