Just got back from my first wedding as a wedding photographer. I was second photographer and neither of us were being paid (bride/groom couldn't pay someone, and hey at least it gave me experience and they didn't go without). Other guy was also amateur but had worked in TV before... Took along my E-P2 with 20mm, kit zoom, adapted Pentax-M 50/1.4 and 100/2.8. Also the FL-36R flash unit. Also had a teeny little Canon compact as backup but didn't really use it. For outdoor shots, had the most success with the 20mm and the flash as FP fill flash, allowing for a wide(ish) aperture. Some of the best shots were on the beach with sun low, long shadows, and fill flash pointed at them. Until now I'd been a "natural light" person but using a flash in combination with the sun can get really nice "glossy" results. I tended to shoot wider than the other photographer and we both had some winners at that location. Did some shots with the 50mm and 100mm, but quite a few with these were missed due to depth of field being too narrow. Learned some lessons here - at such a long focal length, even f/4 or so has such a narrow depth of field that focusing on the bride's hair/eyes and the groom standing right with her will be blurry. It was hard to get a sense of this when reviewing on the camera screen. Manual focusing wasn't too much of a pain as people stand still most of the time - for walking on/off though MF was tricky and I wish I'd had a longer reach autofocus lens. Indoors, I had a lot more winners than the other photographer, with similar sort of camera and flash except his was Nikon DX - my success mainly attributed to my fast prime (20mm) but may also have been my different flash technique - I boosted ISO to 500 and with bounce flash, a little flash card it blended well with the existing light and looked good. I also favoured bouncing straight up (white ceiling) with a small white card to bounce, over the 45 degree angle with a little diffuser that the other guy had. I gotta add - the auto white balance on the E-P2 is amazingly spot-on. Even though I could easily correct it in RAW, not a single shot in all locations including indoors isn't perfectly white balanced apart from a couple of indoor shots where I tried to get arty with the light. A lot of shooting weddings is about trying to organise people and tell them what to do, and that's not really the part I enjoy, so being the "other guy" saved me much of that stress. On the other hand, at times I would have liked a little bit more freedom to come up with some creative ideas myself while the models were lined up. I did get a lot more background/candid shots and that was more my role, really.