What is the canon ef s 17 55mm f 2 8 is usm good for?

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From Canon EF-S 17-55mm f/2.8 IS USM: Canon EF-S 17-55mm f/2.8 IS USM: A zoom lens by Canon for APS-C cameras, 17-55mm f/2.8. The constant f/2.8 standard zoom for Canon's APS-C DSLRs. Specs - Maker: Canon - Focal length: 17-55mm (zoom) - Maximum aperture: f/2.8 - Made for: APS-C sensors - Mounts: Canon EF - Stabilised: yes - Autofocus: yes What it frames like - On APS-C (Canon) (Canon EF): like 27-88mm on full frame; f/2.8 gives about the depth of field of ...

From Sensor sizes: The main sizes: - Full frame (36 x 24mm, the size of a 35mm film frame). The reference size: when people quote a focal length "in full-frame terms", this is what they mean. - APS-C (about 23 x 15mm). Crop factor about 1.5x (1.6x on Canon). Most entry and mid-range mirrorless cameras. - Micro Four Thirds (about 17 x 13mm). Crop factor 2x. Small, light systems from OM System and Panasonic. - 1-inch ...

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