« on: August 05, 2014, 07:15:11 AM »
When I'm the official photographer, I try to avoid using flash as much as possible - unless you gel it and have a perfect wall/ceiling to bounce off, or have the time to set up multiple lights, the results will look significantly worse than a bit of grain due to the higher ISO's (think rabbit in the headlights, or mismatched ambient/artificial colours for near/far objects).
And as a guest, I'd do my utmost to avoid using the flash. Bear in mind you're under no pressure or obligation to get the shots, so why go around drawing attention to you while you're at it? Also, it can create a minor situation if you 'outgun' the photographer by using a big white lens like your 70-200. Keep it subtle.
Don't feel like you have to run around everywhere getting to the best angle and cover every single moment. The photographer is paid to do that. Enjoy the day, pack very light (two lenses max, no flash) and aim to take a few photos, and if you come away with a handful of really magical keepers, that'd be all you could ask for.
For me that'd mean shooting mostly available light, shallow depth of field shots with your 50, and occasionally adding in some creative use of your wide angle lens. Or take the 100L as the second lens for some more subtle head shots or full body candids from a distance. Take your time and go for quality, not quantity. You have no pressure to deliver.