Clarkey, yeah, using a medium format bellows will definitely raise the price. And you have to have a camera to fit the bellows, too. To dupe medium format slides or negatives with a bellows, you'll need a slide copier attachment made for those bellows. I've seen bellows to fit my Bronica ETRSi (6x4.5) that sell on eBay for $185 and up. Currently there is one set of bellows for the Pentax 67 on eBay. The seller is asking a whopping $700 for it. But neither of these bellows units come with slide attachments. So bellows might not even be an option with medium format. I think the reason why you don't see slide duplicator attachments with MF bellows is because most of us just have the slides developed unmounted. I've only had mounted MF slides developed once. The resulting mounted slides were too clumsy to be used anywhere so i just said, "no more." So, taping them down or similar is the best way to go, IMO.
One thing I didn't mention in my above comments about doing digital dupes is I set my 55mm Micro Nikkor to f/8 for the dupes. I want some depth of field to eliminate any possible bit of out-of-focus areas due to the slight curvature of the negative or the slide.
Last edited by cooltouch; 03-01-2015 at 09:35 AM.