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Author Message   Brcamera Tinkerer Username: Brcamera Post Number: 195 Registered: 08-2010 Rating: N/A Votes: 0 Posted on Thursday, August 16, 2012 - 09:36 am:    Jiri, Yes, the information on the redesigned mirror box is correct, you can see the trap in the back of the mirror box on the bottom. But probably the easiest way to tell if you have a FM2n is to notice the mirror stop toward the front bottom of the mirror box- the FM2 does not have this part. You could also check to see if the meter turns off when it goes past the 1/4000 mark as this is how the FM2 operated. In fact, that is one of the issues with the FM2 - the meter would turn off when put into X200 flash mode. Not good when you want to meter and use fill flash. Here is a little know fact on the FM2- although the shutter dial is marked X200, 1/125 is marked in red on the shutter dial, and the Nikon instruction book tells you that 1/125 is the fastest flash sync speed, the camera will actually flash sync fine when used at 1/250!