My lens has a built in “petal type” lens hood, can I use a filter holder?
In most cases, when a lens has a fixed “petal” type lens hood (often on extreme wide angle lenses) use of a filter system is not possible – hand holding the filters is the only option.
Popular lenses affected are:
Canon 14mm, Sigma 8-16mm, Sigma 12-24mm, Tokina 16-28mm.