I had the same problem with an M 35 f2.8. Cost about $40 to clean at a local repair shop.
Randy Jackson wrote:
Hi, I have a beautiful SMC-M 35mm f2 with some (not a lot) oil on the blades, and the aperture seems slow, especially when it's mounted on a camera and I try to see how fast it opens when I use the depth of field preview. I would like to get it repaired, and have seen from browsing through the archives that fixing this problem is possible. Does anyone know how much might I expect to spend, and/or have any suggestions as to a place I could contact and mail it to? I live in Minneapolis, but am not aware of any places locally that work on older equipment. Thanks much. Randy jackson
