ZF2 Not possible to add my own input filters?

[wige2480]

I have created a custom input filter for ZF2 that extends AbstractFilter. However, I can't find any way to tell ZF2 where the filter is so that I can use it.

I tried adding it to the Module->onBootstrap:
StaticFilter::getPluginManager()->setInvokableClass('Ascii', 'Namespace\Ascii');

However, StaticFilter doesn't seem to be used for anything. So, is there some way that custom filters can be added?