Ron you have a few choices. You say you have lots of slides to copy, what number is lots as this is important? If you are talking thousands or even hundreds, you may just want to pay a service to copy them for you. As for using your d700, the 105 mm is the wrong lens to get consistant results, although it could be done,you would have to set up a stage at the proper distance and make sure your camera is perfectly parallel to the slide. This could be accomplished with a copy stand. As you have found it is better to use a Nikkor 55 mm f/2.8 micro and an ES-1, or if you have one a PB-6 bellows with slide copying attachment. This assures the sensor plane and the film plane are in allignment and also keeps out stray light. You do not need any further extension tubes-that was needed when you used a DX camera. With the D700 you will get a 12 MP image in NEF format, but will need to make sure your slides are really clean as you will not have the advantage of Digital Ice to remove dust and scratches, which will require a lot of work in post. I have gotten excellent results this way; see my gallery for examples. The next option is to use a film scanner but this will cost you more than a 55 mm Micro Nikkor and when you are done copying your slides, it will essentially be useless, but you will get excellent results. The final method is to use a flatbed film scanner. Cheap flatbeds will give you awful results nowhere near what you will get from the above methods. The best results would come from pro scanners which are way to costly costing thousands. A good compromise would be the Epson V700 which can be had for about $500. It is designed to copy both film and photos and has two lenses that are selected automatically for the task at hand. The end result would give you around a 7 MP image that was cleaned with digital ice and you could copy about 6 slides at a time.