One of the first photos with my new D610. 28mm f/4 PC-Nikkor, 30 seconds, f/11 (I think, no EXIF data from this lens).
For the long exposure, I am using a Manfrotto tripod and ball head, then using an ML-L3 wireless remote, setting the camera in Remote mirror-up (Menu > Shooting Menu > Remote Control Mode > Remote Mirror Lockup) were the first press of the shutter button locks the mirror up, and the second fires the shutter.