It's what people who do catalogs and the like use. You can see it in use on some websites as well, though it's usually high-end gemstone dealers and the like plus a couple of the high-end auction houses.
Just go to Tiffany.com
Good results require this sort of equipment.
http://www.luminous-landscape.com/reviews/...s/mp-e-65.shtmlProbably the best dedicated lens for this sort of work that will fit(I think so - not a Canon expert) on your camera.
65mm is very close to a 1:1 ratio to begin with, and this is a macro-only lens. 5x is a godsend.
Cheaper still is this:
EF 50mm f/2.5 Compact Macro ($250 at B&H)
http://www.the-digital-picture.com/Reviews...Set-Review.aspxB&H photo item # KEAETSCD ($169 at B&H)
Three tubes for the price of Canon's one. (over half a dozen different lengths if you mix and match them together)
http://www.luminous-landscape.com/reviews/...non_macro.shtmlA nice bit of info/page from this site.
http://www.shutterfreaks.com/Tips/ExtensionTube.htmA good example of an extender tube in action.
Note - the extender tubes will convert almost any lens into a macro, so you can actually squeek by in a pinch with a tube and a simple 50, 85, or 100mm lens. Most non macro lenses focus at about half life size natively, so adding 2-3 tubes together is a quick and dirty trick.(worth trying out with your existing lenses - can't hurt to try) The 85mm with a .44x magnifier photo at the site above is a superb example of what a even a cheap lens and a magnifier/extension tube can do. But with a true macro, even if it only goes to 1:1, things get stunning for small things like jewelery, because .25x factor with something already at life size is really large - perfect for small items.
(though again, the MP-E 65mm 1-5x while pricey, does this all right out of the box)
http://photo.net/equipment/canon/macro-flash/Another nice item you might consider - makes lighting small subjects much easier. But it's kind of pricey compared to a light box and some tweaking. Lots of examples on this page of macro lenses and small items. This gives you an idea of why lighting like this or a light box(much cheaper!) is a necessity.