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Lenses for wedding
The kitbag staple for most wildlife photographers is a long telephoto prime or zoom with at least 400mm reach. This is because most wildlife subjects are difficult to get very close to, which means working from some distance away. Depending on the type of wildlife, the budget available and the weight of the lens the photographer is prepared to carry, there is a range of different options available in the Sigma range. On APS-C cameras, a crop factor applies, which gives users around 1.5x extra effective reach.
In some situations, such a photographing in a zoo, or if working with very tame animals, it may be possible to use shorter focal lengths. These have the advantage of being smaller and lighter, and they usually have faster maximum apertures.