Digital BW, The Print

I have been following with interest the discussion of using a copy 
stand, light tablet, and digital camera to copy negatives instead of 
scanning. I have been using a Nikon 9000 to scan black and white 35mm 
and 120 negatives. If this alternative works as well, I would strongly 
consider selling my scanner. Could someone who is doing this please 
describe it in greater detail? For example, what length camera lens do 
you use? Do you place a piece of glass on top of the negative? Anything 
else one needs to know about how to do it? Also, it would be great if 
someone would post a copy of a negative copied using this method. Thanks 
so much. Paula Berg