Fixed, prime lenses such as the Canon EF 300mm F4L IS USM and Canon EF 400mm F5.6L IS USM will give you sharper images, but you lose the flexibility and of being able to zoom the lens in and out in order to frame your photos as best as …

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Which Canon Lens For Airshow Photography? | Digital Photography Notes

Zoom lenses offer you excellent versatility especially when shooting events where you often need to have a wider view angle, when photographing groups of people, to being able to focus in on the action.

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Mastering the Basics – Lens Basics