The theory in the previous threads on this topic have no been a lens wider than your hand or some such arbitrary measurment. SLRs with the standard kit lenses don't get looked at and you see many of them around. If he tries to bring his 300mm lens, he'll probably get stopped. I have brought in various compact(ish) ultra zoom cameras over the years and nobody bats an eye. Having the extra zoom is an advantage.
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