Overview

The Sigma Z 135mm f/2.8 Pantel is a manual focus lens known for its unusual f/64 aperture. Wide open at f/2.8, sharpness is lacking, but improves noticeably from f/4 onwards (tikkathree). Build quality varies; copies can be found in pristine or poor condition (ducdao). The f/64 setting is a unique feature, though its practical usability is questioned (tikkathree). This lens suits photographers interested in experimental or extreme aperture effects, but those seeking sharpness at wide apertures may be disappointed.