The panel fits perfectly and can be attached in reverse with screwed adapter ring. However, contact screwed on filters (in my poles and UV filters) Depending on the system at 18mm APS-C Ojektiv vignetting at the edges. Without filters, directly on the lens are almost no longer exists.
Who is aware of, and does not see this as a reason for complaint, in any case, a recommendation, since the supplier system-related properties can not change.
Moreover, I was very pleased with the entire transaction.
