Canon ef s 18 200mm f 3 5 5 6 is vs tamron 18 270mm f 3 5 6 3?

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From Canon EF-S 18-200mm f/3.5-5.6 IS: Canon EF-S 18-200mm f/3.5-5.6 IS: A zoom lens by Canon for APS-C cameras, 18-200mm f/3.5-5.6. Specs - Maker: Canon - Focal length: 18-200mm (zoom) - Maximum aperture: f/3.5-5.6 (it gets darker as you zoom in) - Made for: APS-C sensors - Mounts: Canon EF - Stabilised: yes - Autofocus: yes What it frames like - On APS-C (Canon) (Canon EF): like 29-320mm on full frame; f/3.5-5.6 gives about the depth of field of f/5.6-9 there. ...

From Tamron 18-270mm f/3.5-6.3 Di II VC PZD: Tamron 18-270mm f/3.5-6.3 Di II VC PZD: A zoom lens by Tamron for APS-C cameras, 18-270mm f/3.5-6.3. Sold first with a gold ring (B008), later with a silver one (B008TS).

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