Panasonic lumix s 14 28mm f 4 5 6 macro vs sigma 16 28mm f 2 8 dg dn contemporary?

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From Panasonic Lumix S 14-28mm f/4-5.6 Macro: Panasonic Lumix S 14-28mm f/4-5.6 Macro: A macro lens by Panasonic for Full frame cameras, 14-28mm f/4-5.6. Specs - Maker: Panasonic - Focal length: 14-28mm (macro) - Maximum aperture: f/4-5.6 (it gets darker as you zoom in) - Made for: Full frame sensors - Mounts: L-Mount - Stabilised: no - Autofocus: yes What it frames like - On full frame (L-Mount): as marked, 14-28mm. - On APS-C (L-Mount): like 21-42mm on full frame; f/4-5.6 gives about ...

From Sigma 16-28mm f/2.8 DG DN Contemporary: Sigma 16-28mm f/2.8 DG DN Contemporary: A zoom lens by Sigma for Full frame cameras, 16-28mm f/2.8. Specs - Maker: Sigma - Focal length: 16-28mm (zoom) - Maximum aperture: f/2.8 - Made for: Full frame sensors - Mounts: Sony E, L-Mount - Stabilised: no - Autofocus: yes What it frames like - On full frame (Sony E, L-Mount): as marked, 16-28mm. - On APS-C (Sony E, L-Mount): like 24-42mm on full frame; f/2.8 gives about the ...

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