Looking hard at this Canon FDn 17/4.0 UWA. Description is “Pristine / Mint condition…both caps, 72mm Hoya Skylight filter, Canon case, everything works perfectly as new”. At my request, seller verified back that he rechecked with an LED that there is zero haze, zero fungus, zero scratches, zero problems, etc. He only sells photo equipment and has 100% positive feedback rating, so I assume he knows what he's talking about. Should have a field of view on an NEX about like a 24mm would have on a FF, right?