Al Kaplan - Miami, FL , May 26, 2004; 09:03 a.m.
Let me start out with stating that I'm white but spent nearly 12 years of my life with a lovely brown skinned Jamaican woman. I still carry pix of my two step sons in my wallet. I've photographed a lot of blacks over the years.
The shine is because people of African descent usually have oilier skin, and the reflection from the sheen on a white person's face isn't all that much brighter than the underlying skin tone so you don't get the contrast. With women this usually isn't so much of a problem because they tend to use make-up, and the base and the powder kills the sheen. In general, the darker the skin the more noticeable the problem. You might discuss with the bride and groom the possibility that the ladies in the wedding party might help apply a bit of suitably toned powder to the mens' faces as well. This will go a long way towards solving that problem. Have a box of tissues handy during the posed shots in case anybody needs to wipe their forehead.
The next problem is that in order to preserve detail in the white wedding gown (lace, embroidery, etc.)we tend to pick an exposure that will make the darkest parts of the photo come out too dark. The automatic exposure chosen by your camera and/or auto flash might be doing this for you. Because this is not a new problem people are used to seeing wedding pictures like this. Choose a low contrast professional portrait type of color film. This will give you the longest range of tones. Films like Kodak Gold, designed for amateur use, have a lot of contrast and a tendancy to block up the highlight areas (the gown).
It is important to give enough exposure that the faces (and tuxedos) aren't at the extremes of the film's ability to record detail. The best way to do this is to use your camera on manual. Otherwise one photo might have the flash sensor reading mostly black tuxedos, the next mostly white and pastel gowns. Usually the film's latitude will handle this, but dark faces are where the problem lies. If there's not enough image on the film you can't put it there later. With too much exposure you can still print through it. Modern color negative films can easily stand some over exposure, and in fact have slightly finer grain when so exposed.
I'd suggest that you should shoot a few rolls and experiment a bit if you can find somebody. This should be no problem if you ask a black friend or coworker to pose in exchange for some free prints. Try setting your meter, camera, and flash for ISO 100 for ISO 160 film, ISO 250 for ISO 400 film. Also try bracketing one stop over and one stop under. See what works best for you with your equipment.