mdarnton
Well-known
In that vein, I'm using this system for duping B&W negs. With my Nikon D300, a transparency is right at the boundary of it's dynamic range, but a more modern camera would give me a couple of more stops of range, and I think it would work fine. I do so much of this, I'm thinking of getting a Sony NEX-7 to plug into this setup:
http://www.flickr.com/photos/mdarnton/7183241686/
Of course, that's film to digital, which isn't going to get you another slide.
I used to produce educational slide shows and film strips, and did my own slide dupes using Kodak's E4 duping film of the time. They didn't look like the originals (the problem wasn't contrast. . . it was more like a saturation issue, if I remember right), but honestly, the intended audience wasn't going to know the difference.
http://www.flickr.com/photos/mdarnton/7183241686/
Of course, that's film to digital, which isn't going to get you another slide.
I used to produce educational slide shows and film strips, and did my own slide dupes using Kodak's E4 duping film of the time. They didn't look like the originals (the problem wasn't contrast. . . it was more like a saturation issue, if I remember right), but honestly, the intended audience wasn't going to know the difference.