External flash compatibility - Nikon D-50

[BOBWRC]

I am considering the purchase of a Nikon D-50, asI have a Nikon F-70 35mm. SLR with a variety of lenses.

I also have a Sunpak 4000AF electronic flash unit for that camera, and wonder ifit will be usable on the D-50?

Also: I'd sure appreciate comments from D-50 owners, relative to shutter "lag time" with regard to taking action shots.

Thanks,

Bob W