I do not not know anybody, who got a working NAM-1/ND combination (without pressing manually the adapter on the ND as described in another thread).
Shutter lag is existing (as with every camera) but not as long so that you have to worry about it. But it is not a camera for sports.
Shutter lag is existing (as with every camera) but not as long so that you have to worry about it. But it is not a camera for sports.