(Works only with battery grip bent contacts etc.) was first, I was a little unsure about the compatibility of the battery grip with the D90 as in some reviews of problems reported. So I went to the photo shop of my confidence and tried the MB-D80 unceremoniously out and it worked just fine. That, however, say that I always operate the battery grip with 2 batteries. Through the battery grip, the use of the camera much easier, especially with mounted compact flash (I use a Metz 54 MZ 4i) is significantly more balanced camera in his hands. So it is no wonder that I now often photografiere in portrait mode.