Sigma 20 200mm f 3 5 6 3 dg contemporary vs tamron 25 200mm f 2 8 5 6?

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From Sigma 20-200mm f/3.5-6.3 DG Contemporary: Sigma 20-200mm f/3.5-6.3 DG Contemporary: A zoom lens by Sigma for Full frame cameras, 20-200mm f/3.5-6.3. A 10x full-frame travel zoom that starts at 20mm. Specs - Maker: Sigma - Focal length: 20-200mm (zoom) - Maximum aperture: f/3.5-6.3 (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 marked, ...

From Tamron 25-200mm f/2.8-5.6 Di III VXD G2: Tamron 25-200mm f/2.8-5.6 Di III VXD G2: A zoom lens by Tamron for Full frame cameras, 25-200mm f/2.8-5.6. The second-generation version of the 28-200mm, now starting at 25mm.

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