Primary camera and backup camera
If photography has become such a passion of yours to the point wherein you have decided to more or less make a career out of it, then there is a pretty good chance that you may already have everything that you could possibly need for as far as the camera needs are concerned. You will need a second camera for backup though and that is something that might cost some amount of money. If this is something that you may actually end up struggling with, there is no need for you to buy one out just yet. Save your money up until you will be able to do so. In the meantime, a borrowed camera or a rented one will work just fine for you. The point is that this is something that you cannot skip out on. It is absolutely crucial that you have a backup camera one way or the other.
Wedding photography basic lenses
You will need two basic lenses for your wedding photography career. You will need a telephoto lens for all of those times wherein you will need to take big close up photos but you are not allowed to be right next to the people you are supposed to take photos of. The second lens that you will need is a wide angle lens. A wide angle lens will let you take those group photos without having to worry if all of the people will get to fit in the view angle of the lens at some point or so. Again, all photography accessories cost money and lenses in particular can be quite expensive and if money is an issue and you cannot afford them just yet, the perfect meantime solution would be a medium zoom lens. It does a little bit of both what the telephoto lens and what the wide angle lens can do.
Memory cards and batteries
Make sure that you are able to pack more than enough memory cards and batteries for the wedding photography event. Ideally, you need about 60 GB worth of memory cards and about two extra batteries per camera. Make sure that the memory cards are wiped clean before and after every single use. Like kent wedding photographer, make sure that all of your camera batteries are fully charged as well so that you can guarantee that you will never run out of juice while you are covering the wedding event. These are pretty basic stuff and you do not really have any excuse if you bail out on any of these things.
Tripod and light stands. A tripod is something that can give your camera the kind of stability and support that it basically needs. It is perfect to bring around with you during wedding events especially for those times wherein you will have to shoot in low light settings. The camera tends to have some vibrations when it shoots in night mode so having a tripod handy will really get to help you out a lot for as far as keeping things grounded is concerned.