I have just my really expensive pole filter on this adapter is screwed (not tightened, but less). After a few test shots, the polarizing filter using all known tricks (cable ties, string) could not be removed. The problem is certainly the one in the Doppelringigen polarizing filters - the worst rating, there are the following reasons: - Material plastic (deforms the hold) - The bayonet catch towards the camera revolve, so that you can not use it as a firm grip when turning with force, the camera body. Thus, you have to take it off and then pushes you only the plastic together. - The negative vote would be for the Canon SX40 due because it is the bayonet lock.
Meanwhile, the pro-filter is in addition to adapters in the trash - along burned about 100
