Dust is everywhere in the environment, unless one lives in outer space. It is impossible to find a used lens without dust, and even new lenses have some dust. Dust is out of the photographic plane and simply will not affect a photograph.
SOLIGOR 28MM F2.8. CLOSE FOCUS WIDE ANGLE LENS. MAY ALSO FIT DIGITAL SLR CAMERAS WITH APPROPRIATE ADAPTOR (NOT SUPPLIED). MAY ALSO FIT OTHER DIGITAL CAMERAS. AUTOFOCUS AND DIGITAL CAMERAS. GOOD CONDITION, OPTICS CLEAN, NO FUNGAS, MC COATED OPTICS.