Panasonic lumix s 24 60mm f 2 8 vs sigma 20 60mm f 2 8 4 dg contemporary?

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From Sigma 20-60mm f/2.8-4 DG Contemporary: Sigma 20-60mm f/2.8-4 DG Contemporary: A zoom lens by Sigma for Full frame cameras, 20-60mm f/2.8-4. A standard zoom that starts at a true ultra-wide 20mm. Specs - Maker: Sigma - Focal length: 20-60mm (zoom) - Maximum aperture: f/2.8-4 (it gets darker as you zoom in) - 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 ...

From Panasonic Lumix S 24-60mm f/2.8: Panasonic Lumix S 24-60mm f/2.8: A zoom lens by Panasonic for Full frame cameras, 24-60mm f/2.8. A compact constant-f/2.8 standard zoom. Specs - Maker: Panasonic - Focal length: 24-60mm (zoom) - Maximum aperture: f/2.8 - Made for: Full frame sensors - Mounts: L-Mount - Stabilised: no - Autofocus: yes What it frames like - On full frame (L-Mount): as marked, 24-60mm. - On APS-C (L-Mount): like 36-90mm on full frame; f/2.8 gives about the depth ...

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