Remark on my repro setup: 

My digital camera is mounted on a repro stand. The stand is similar to the stand used in an analog darkroom. 

The "duplication direction" is opposite to the analog darkroom: The camera is mounted on the stand, while the object to be duplicated is placed on the base plate. 

I have a light table on the base plate when a negative or positive is duplicated. 

Mounted on the camera, depending on lens, may an extension tube be needed to achieve the macro distance to duplicate a small object.