Totally agree with everything John has written here.
The one backup that I was lacking was flash. I have an EX580 and my backups are two vivitars. Now the vivitars are great bits of kit and for some off camera flash where it's all manual I'm happy to use them but I was very aware that the trickery of the EX580 was not there so there would be a problem if something went wrong with the EX580. So I bought another one.
Second hand, after all, I will still use my "bought from new" one as my frontline one but at least I have a backup.
Blooming good job! Only the second wedding since I bought it and mine developed a fault, would not change mode and would not zoom. Oh dear! OK, I'll sort that out later, in the meantime, just dive into my bag and as if by magic.........another EX580 with fully charged batteries is produced and off we go. Bride and Groom just laugh because one of the questions they had asked me was about backups. "What happens if" With two photographers and each with backups just about every eventuality can be covered.
And John makes another very valid point, what happens if you, yourself get crocked and can't do the day? I'm lucky that there is a group of five SWPP members that I am friends with and we have an agreement that we would (if avalable on the day) rush to the aid of each other should that happen. If I was feeling that bad a few days before, I'd be on the phone arranging a possible substitute.
Tested the flash when I get home side by side and found the fault, all fixed now with a new foot on it.
