I shoot enough events that I feel like I can offer some decent advice. All the advice given is good and solid... and my head is spinning after reading it.
My BEST ADVICE -> K.I.S.S. Principle
<- My BEST ADVICE (Read distant.star
's advice again. Relax and enjoy!)
I don't care how much you shoot, how many events or whatever, every photographer who gives a hoot will over think these things because they want to do a great job.
There are many ways that this can be done with many cameras and lens scenarios. In general, you have good equipment and a LOT can be fixed in Post so don't kill yourself. Take your time, relax and try different things. Watch your LCD as you shoot and adapt as you go. Don't take too much stuff. And ditch the CPL.
So here's MY
two scenarios... Simple
- Take the 5D3, 24-70 and Flash. Shoot RAW. Set your WB to daylight and leave it there or use the gray card and set it custom but once it's set, don't change it. Corrections in Post will be much easier starting from the same place every image. Set ISO 3200 indoors and 400 outdoors. Create custom camera settings for indoor and outdoor to save time. Set for Av Priority f/4 (lowest you can go) with Flash ETTL AUTO indoors. Outdoors, depending on light levels, shade, etc you might need to go with center point metering. I wouldn't worry about HSS, you won't have time. It would probably be better to use a smaller aperture anyway to help control all the background light and have more of the scene in focus. Point flash with Sto-Fen up 45 degrees indoors, 90 degrees forward outdoors and dial in EC on the fly like wickedwombat
suggests. (This is pretty much what I do most of the time.) I wouldn't take the 70-200 unless you are planning to get a lot of face only shots, or maybe just noses and eyes. Heck, I would have my 16-35 L lens hanging on my belt because I would find it much more useful indoors where I'm cramped and trying to get the event in the frame. And you might shoot a bit with no flash so the aquarium will be pretty, or with the flash dialed back quite a bit so as not to overpower or reflect heavily off the glass.
Another indoor flash idea, gel the flash to match the aquarium light color. Some kind of blue or green perhaps?More Work and Versatility
- Take the T2i with the 24-70 for reach and put the 16-35 on the 5D3. Put the flash on the T2i. Use the 5D3 wide with available light indoors and out for group, event, story shots, etc. Use the T2i for candids, etc and light the faces better with the flash.
Another lens I would take for some fun shots would be... drum roll... the EF 15mm f/2.8 FishEye
! Inside with the aquarium, letting the kids get really close and capturing them near the tanks, no flash. I think that would be really neat! Also, held up high it would give some great story shots.
Seriously, relax and enjoy this. To reduce the worry, go to the venue early and experiment for an hour or two. Make sure it's about the same time of day!
Keep us posted on how this goes and what you ended doing. Sharing a few pictures would be nice too!