This Pentax lens has a Pentax K mount. The filter size for this lens is 49 mm, so make sure the filters will fit.
HD Pentax-FA 43mmF1.9 Limited Black Limited Lens standard prime lens, High-performance HD coating, SP coating, Round diaphragm, Machined aluminum body
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(Black) Pentax HD FA 43MM F/1.9 Limited Digital Camera Lens
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