The action of the push pull zoom and twist focus is smooth and positive.
Nikon AF 28-200 D /3.5-5.6 Sigma Aspherical UC Zoom Lens Autofocus lens
Minolta Dynax 3xi 35mm Film SLR Camera + Sigma 28-70mm Zoom Lens
Sigma High-Speed Zoom Lens Multi Coated Black 200mm 1:3.5 F=80-200mm untested
SIGMA AF-MF ZOOM LENS 170-500mm F5-6.3 APO Sony Mount
TESTED Minolta Dynax 5xi Film Camera SLR + Sigma 35-105mm Zoom lens
Sigma DG AF Zoom 70-300mm f/4-5.6 Macro Auto-Focus Lens - Canon EOS/EF Mount
