I´ve shot a few rolls through my recently-acquired Pen EE-2 and now am sufficiently encouraged by the results to continue. Therefore I am now seeking suitable filters, at least a Skylight and a Yellow. Some places I read that two filter sizes will fit, namely 43.5mm and 22.5mm, while another site said only the larger size would fit this particular model in the EE series. Looking on my own lens I cannot actually see any threads at all ! I´m confused... could anyone explain what I need, please?