you want fast shutterspeeds for bif, also the skys are not always bright here in the uk, but its better to have sharp noisey shots then blurry one.
You can still get fast shutter speeds of BIF without going to ISO 1600 imo. I never go up to 1600 unless I want a record shot. I'm picky about noise levels in images and would rather go without if it means a having a noisy image.
ISO 320, S/speed 1/1000th, f7.1
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What lens please?
I'd never go up to IS0 1600. Max I go up to is 800, and usually thats not needed because if you're shooting BIF then you're generally shooting against a sunny/lighter background, so will get the shutter speed that way.

i should be fine have an apature of about f8, also depending on weather conditons you miht need to use spot metering instead of multi.I have a lensesforhire 300 f4 arriving Friday so hope to get some practice in before Sunday. On my D5000 I'll try settings aound 1/500-1/1000 but it's the focus I'm more concerned about - if I go singlepoint AF and try and follow the heads as they do a "fly-by" will that suffice?![]()
