Nikon's ES-2 Film Digitizing Adapter (what a mouthful!) comes with just about everything one needs to tackle either slides or strips of negatives. There is a holder for a strip of six negatives, a holder for a pair of slides, the carrier either of these that includes a diffusion screen and adapter rings to attach the carrier to either an AF Micro-Nikkor 60mm f/2.8D or an AF-S Micro-Nikkor 60mm f/2.8G.
The carrier has a 52mm thread and so is suitable for any Micro-Nikkor of your choice. Not having one already, I settled on the 55mm f/3.5 AI that seems to be well-regarded here.
The photograph below shows, from the camera outwards, the PK-13 extension ring that allows the lens to reach 1:1, the lens, a K5 ring and then the carrier. The screw allows one to rotate the end of the carrier so that it lines up with the sensor.
As you can see, when focused on a negative (not shown) this arrangement is at somewhere between 1:1.1 and 1:1. This captures the entire negative and a smidge of the holder.