http://www.nikonchat.com/nikon-200mm-f2-8/

What camera equipment I need for wedding photography?
I already have the following: Nikon D300 (x2) Sigma 70-200mm f2.8 Sigma 17-50mm f2.8 Nikon 18-200mm f3.5-5.6 nikon 50mm F1.4 Nikon SB-900 Flash with SD-9 battery Sekonic L-358 Light Meter more memory cards, Tripod / Monopods, extra batteries, etc …
Great setup. You have everything you need in the form of lenses. You might be able to "artistic" as lenses 10mm fisheye lens or a change tilt (always fun). Need additional flashes, however. For group shots, you need proper flash exposure of both sides evenly the light of their group. Plus you can get creative with real estate backlight and sidelight. I just did a session where I made several type flash lamps here …. http://bc-photo.smugmug.com/gallery/7259794_AZqZH # 477013107_xVhUH http://freephotographytutorials.blogspot.com/
Nikon 80-200mm f2.8+Custom Tripod Collar + Nikon HB-29 Hood