Tree & its reflection in Don River - NEX-5N & Kodak Cine Ektar 63mm f2 C-Mount
The Kodak Cine Ektar 63mm f2 is one of the few c-mount lenses that actually covers the APS-C size sensor of the Sony NEX cameras. Well, there is still dark corners, but considering it was designed for 16mm movie cameras, it's not bad at all. Also, I think the image circle is even larger than the 102mm f2.7 Kodak Anastigmat. The image towards the edge is far better than the 102mm.
The 63mm f2 is amazingly sharp, and the images coming off of this lens is wonderful, especially in colour. In fact, it's one of my favourite c-mount lenses. If you can get one at reasonable price, grab it and you won't regret it.