Zoom lens. ED glass. Range 50-200mm. Lead free glass. Maximum length 78.5mm. Maximum diameter 66.5mm. For use with GX-10 and GX-20. Lightweight and compact. Mount compatibility - Pentax KAF2, KAF mount. Full time manual override. Filter attachment 52mm. Full size manual focus. Circular aperture. Weight 255g. Manufacturer's 2 year guarantee.