Why something is priced at Canon extra?

This lens hood is Canon typical of good quality and fits perfectly with the 15-85. It is useful and necessary for this objective.
Likewise Canon typically it is sold as an accessory at an inflated price.
In my view, the panel would have at such a high-priced lens are included.
For companies like Sigma which is for years selbstverständlich.Daher only 3 stars.