hey Sohcan
no, 37mm lens are not very common. My dad's JVC camcorder has a 37mmm mount and he bought some 37mm lens with for it, and one of them is a wide angle. This wide angle cost about 200 bucks, but I have yet to try it on on my camera. when i fly home later this month I am going to try it and see how it works. I have been toying with the idea of trying to get a F-type to 37mm mount specially made with a special adapter to mount on my tripod to support the weight of my nikon lens so the camera adapter is not supporting the weight. This is based off the fact that f-type to c-type mounts work pretty good without corrective lens.