Hello to everybody, i am getting straight into to the point. I have a Nikon FE and a Nikon EL which shoot at only one speed. I do not know what speed it is, but they act like there is only one. For example, if i go 1/1000 or 1/500 or 1/2 or 4" or anything else, the curtain remains open for the same period of time. They both have new batteries. Bulb works as expected. Any ideas on what to check or any information, would be appreciated. Thanks a lot!