Do you have any other lenses? Especially wide angles? If so, a better alternative to a close-up diopter is to buy a reversing ring, like this one:
or genuine Nikon brand:
Just be sure to order one for the correct filter size of your wide angle lens(es). Most Nikkors between 24mm and 50mm take a 52mm filter.
Mount your lens backwards for increased magnification. The wider the lens, the greater the magnification. Of course, you'll have to set the aperture manually and meter in the stopped down mode, but that's not that big of a deal. Just focus with the lens wide open, then stop it down and meter, and fire away.
Using reversed WA lenses for macro photography is an old technique and achieves quite satisfactory results with good optics. I've done it with 35mm and 28mm lenses and been well pleased with the results. Even a 50mm gives good magnification. Try it for yourself: take a lens, turn it backward and look through it at a subject close up. You have to get pretty close before it'll come into focus. The only drawback to this technique is the focusing ring doesn't make much of a difference. So you have to be able to accurately position your camera. A macro focusing rail is good for this. Mounting it on a tripod is essential. MFRs can get really expensive, but here's a reasonably priced one:
Last edited by cooltouch; 01-16-2009 at 10:30 PM. Click to view previous post history.