Thanks! It works fine, good field of view and aspect ratio. The problem is the performance, doesn't go further than 15 fps but it's normal for an alpha.

AMD FX-8320 @ 4GHZ
Shapphire 7950 OC Vapor X 3GB DDR5
Kingston HyperX Blu DDR3 8GB 2100
NOX NX Series 620W
Asrock 970 Extreme3 R2.0