Listmania!
Wedding Photographer's Survival gear
By an Amazon.com customer
Canon EOS 5D 12.8 MP Digital SLR Camera (Body Only)Canon EOS 5D 12.8 MP Digital SLR Camera (Body Only)
Buy new: $1,979.00 / Used from: $1,400.00
Although a Full-Frame camera is not a must, it definitely helps -- big time!! And the 12.8MP sensor gives you flexibilty in cropping.
Canon EF 70-200mm f/2.8L IS USM Telephoto Zoom Lens for Canon SLR CamerasCanon EF 70-200mm f/2.8L IS USM Telephoto Zoom Lens for Canon SLR Cameras
Buy new: $1,528.00 / Used from: $1,425.00
This lens is a MUST have item. EVERY Wedding photographer should own this lens for low-light church weddings where flash is not allowed.
Canon EF 24-70mm f/2.8L USM Standard Zoom Lens for Canon SLR CamerasCanon EF 24-70mm f/2.8L USM Standard Zoom Lens for Canon SLR Cameras
Buy new: $1,059.00 / Used from: $1,199.00
This really is a workhorse lens although with a good range you'll find very useful if you're using a Full Frame body.
Canon EF 24mm f/1.4L USM Wide Angle Lens for Canon SLR CamerasCanon EF 24mm f/1.4L USM Wide Angle Lens for Canon SLR Cameras
Buy new: $1,139.00 / Used from: $980.00
If f2.8 is just not fast enough, this is by far the sharpest and fastest wide angle lens you can buy! You will have to get used to using your legs to 'zoom' since it's a prime lens but the results of the pictures are well worth it! I got rid of my 24-70/2.8L after buying this lens and don't regret it one bit! 2 f-stops faster and a lot sharper!
Canon EF 35mm f/1.4L USM Wide Angle Lens for Canon SLR Cameras Canon EF 35mm f/1.4L USM Wide Angle Lens for Canon SLR Cameras 
Buy new: $1,149.00 / Used from: $1,029.95
When it comes to the SHARPEST lens Canon makes.... the 35/1.4L is EASILY the sharpest of all the Canon lenses out there. The focal length is a bit odd, however, as it's not wide enough for a wide angle shot but not close enough for a close-up lens. However, it will give you the ultimate in picture quality! RAZOR SHARP IMAGES!!!
Canon EF 85mm f1.2L II USM Lens for Canon DSLR CamerasCanon EF 85mm f1.2L II USM Lens for Canon DSLR Cameras
Buy new: $1,799.95 / Used from: $1,800.00
An 85mm prime lens should be in every wedding photographer's arsenal for the pre-ceremony preparation shots. The 85/1.2L II takes amazingly crisp shots wide open at f1.2. The downside of it (aside from its price tag), is that the auto focusing is slower than all the other Canon USM lenses out there.
Canon EF 15mm f/2.8 Fisheye Lens for Canon SLR CamerasCanon EF 15mm f/2.8 Fisheye Lens for Canon SLR Cameras
Buy new: $589.95
The fisheye shot is one of those shots you just can realistically simulate with Photoshop. A fisheye lens is a great lens to own to get a really wide angle shot of the inside of a church, outside of a church, or inside a reception hall. It can also be used creatively for other shots during the wedding day.
Canon Speedlite 580EX II Flash for Canon EOS Digital SLR CamerasCanon Speedlite 580EX II Flash for Canon EOS Digital SLR Cameras
Buy new: $364.37 / Used from: $540.33
The 580EX II flash is a must have item and one should not even consider shooting an evening reception without one -- regardless of whether or not you own a ton of fast prime lenses.